platform: msm: msm_bus: Add support for bus scaling

This snapshot is taken as of msm-3.18 commit 1513280 (Merge "platform: msm: msm_bus:
Fix memory leak during client unregister)"
Change Kconfig option to say QCOM_BUS* instead of MSM_BUS*

Change-Id: I6dd9aba5b26984a914714ca49ae7253c1f267b4b
Signed-off-by: David Dai <daidavid1@codeaurora.org>

3 files changed, 502 insertions, 0 deletions

diff --git a/include/linux/msm-bus-board.h b/include/linux/msm-bus-board.h
new file mode 100644
index 000000000000..c9d648d38ec4
--- /dev/null
+++ b/include/linux/msm-bus-board.h
@@ -0,0 +1,198 @@
+/* Copyright (c) 2010-2014, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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 __ASM_ARCH_MSM_BUS_BOARD_H
+#define __ASM_ARCH_MSM_BUS_BOARD_H
+
+#include <linux/types.h>
+#include <linux/input.h>
+
+enum context {
+	DUAL_CTX,
+	ACTIVE_CTX,
+	NUM_CTX
+};
+
+struct msm_bus_fabric_registration {
+	unsigned int id;
+	const char *name;
+	struct msm_bus_node_info *info;
+	unsigned int len;
+	int ahb;
+	const char *fabclk[NUM_CTX];
+	const char *iface_clk;
+	unsigned int offset;
+	unsigned int haltid;
+	unsigned int rpm_enabled;
+	unsigned int nmasters;
+	unsigned int nslaves;
+	unsigned int ntieredslaves;
+	bool il_flag;
+	const struct msm_bus_board_algorithm *board_algo;
+	int hw_sel;
+	void *hw_data;
+	uint32_t qos_freq;
+	uint32_t qos_baseoffset;
+	u64 nr_lim_thresh;
+	uint32_t eff_fact;
+	uint32_t qos_delta;
+	bool virt;
+};
+
+struct msm_bus_device_node_registration {
+	struct msm_bus_node_device_type *info;
+	unsigned int num_devices;
+	bool virt;
+};
+
+enum msm_bus_bw_tier_type {
+	MSM_BUS_BW_TIER1 = 1,
+	MSM_BUS_BW_TIER2,
+	MSM_BUS_BW_COUNT,
+	MSM_BUS_BW_SIZE = 0x7FFFFFFF,
+};
+
+struct msm_bus_halt_vector {
+	uint32_t haltval;
+	uint32_t haltmask;
+};
+
+extern struct msm_bus_fabric_registration msm_bus_apps_fabric_pdata;
+extern struct msm_bus_fabric_registration msm_bus_sys_fabric_pdata;
+extern struct msm_bus_fabric_registration msm_bus_mm_fabric_pdata;
+extern struct msm_bus_fabric_registration msm_bus_sys_fpb_pdata;
+extern struct msm_bus_fabric_registration msm_bus_cpss_fpb_pdata;
+extern struct msm_bus_fabric_registration msm_bus_def_fab_pdata;
+
+extern struct msm_bus_fabric_registration msm_bus_8960_apps_fabric_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8960_sys_fabric_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8960_mm_fabric_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8960_sg_mm_fabric_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8960_sys_fpb_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8960_cpss_fpb_pdata;
+
+extern struct msm_bus_fabric_registration msm_bus_8064_apps_fabric_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8064_sys_fabric_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8064_mm_fabric_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8064_sys_fpb_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8064_cpss_fpb_pdata;
+
+extern struct msm_bus_fabric_registration msm_bus_9615_sys_fabric_pdata;
+extern struct msm_bus_fabric_registration msm_bus_9615_def_fab_pdata;
+
+extern struct msm_bus_fabric_registration msm_bus_8930_apps_fabric_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8930_sys_fabric_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8930_mm_fabric_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8930_sys_fpb_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8930_cpss_fpb_pdata;
+
+extern struct msm_bus_fabric_registration msm_bus_8974_sys_noc_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8974_mmss_noc_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8974_bimc_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8974_ocmem_noc_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8974_periph_noc_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8974_config_noc_pdata;
+extern struct msm_bus_fabric_registration msm_bus_8974_ocmem_vnoc_pdata;
+
+extern struct msm_bus_fabric_registration msm_bus_9625_sys_noc_pdata;
+extern struct msm_bus_fabric_registration msm_bus_9625_bimc_pdata;
+extern struct msm_bus_fabric_registration msm_bus_9625_periph_noc_pdata;
+extern struct msm_bus_fabric_registration msm_bus_9625_config_noc_pdata;
+
+extern int msm_bus_device_match_adhoc(struct device *dev, void *id);
+
+void msm_bus_rpm_set_mt_mask(void);
+int msm_bus_board_rpm_get_il_ids(uint16_t *id);
+int msm_bus_board_get_iid(int id);
+
+#define NFAB_MSM8226 6
+#define NFAB_MSM8610 5
+
+/*
+ * These macros specify the convention followed for allocating
+ * ids to fabrics, masters and slaves for 8x60.
+ *
+ * A node can be identified as a master/slave/fabric by using
+ * these ids.
+ */
+#define FABRIC_ID_KEY 1024
+#define SLAVE_ID_KEY ((FABRIC_ID_KEY) >> 1)
+#define MAX_FAB_KEY 7168  /* OR(All fabric ids) */
+#define INT_NODE_START 10000
+
+#define GET_FABID(id) ((id) & MAX_FAB_KEY)
+
+#define NODE_ID(id) ((id) & (FABRIC_ID_KEY - 1))
+#define IS_SLAVE(id) ((NODE_ID(id)) >= SLAVE_ID_KEY ? 1 : 0)
+#define CHECK_ID(iid, id) (((iid & id) != id) ? -ENXIO : iid)
+
+/*
+ * The following macros are used to format the data for port halt
+ * and unhalt requests.
+ */
+#define MSM_BUS_CLK_HALT 0x1
+#define MSM_BUS_CLK_HALT_MASK 0x1
+#define MSM_BUS_CLK_HALT_FIELDSIZE 0x1
+#define MSM_BUS_CLK_UNHALT 0x0
+
+#define MSM_BUS_MASTER_SHIFT(master, fieldsize) \
+	((master) * (fieldsize))
+
+#define MSM_BUS_SET_BITFIELD(word, fieldmask, fieldvalue) \
+	{	\
+		(word) &= ~(fieldmask);	\
+		(word) |= (fieldvalue);	\
+	}
+
+
+#define MSM_BUS_MASTER_HALT(u32haltmask, u32haltval, master) \
+	MSM_BUS_SET_BITFIELD(u32haltmask, \
+		MSM_BUS_CLK_HALT_MASK<<MSM_BUS_MASTER_SHIFT((master),\
+		MSM_BUS_CLK_HALT_FIELDSIZE), \
+		MSM_BUS_CLK_HALT_MASK<<MSM_BUS_MASTER_SHIFT((master),\
+		MSM_BUS_CLK_HALT_FIELDSIZE))\
+	MSM_BUS_SET_BITFIELD(u32haltval, \
+		MSM_BUS_CLK_HALT_MASK<<MSM_BUS_MASTER_SHIFT((master),\
+		MSM_BUS_CLK_HALT_FIELDSIZE), \
+		MSM_BUS_CLK_HALT<<MSM_BUS_MASTER_SHIFT((master),\
+		MSM_BUS_CLK_HALT_FIELDSIZE))\
+
+#define MSM_BUS_MASTER_UNHALT(u32haltmask, u32haltval, master) \
+	MSM_BUS_SET_BITFIELD(u32haltmask, \
+		MSM_BUS_CLK_HALT_MASK<<MSM_BUS_MASTER_SHIFT((master),\
+		MSM_BUS_CLK_HALT_FIELDSIZE), \
+		MSM_BUS_CLK_HALT_MASK<<MSM_BUS_MASTER_SHIFT((master),\
+		MSM_BUS_CLK_HALT_FIELDSIZE))\
+	MSM_BUS_SET_BITFIELD(u32haltval, \
+		MSM_BUS_CLK_HALT_MASK<<MSM_BUS_MASTER_SHIFT((master),\
+		MSM_BUS_CLK_HALT_FIELDSIZE), \
+		MSM_BUS_CLK_UNHALT<<MSM_BUS_MASTER_SHIFT((master),\
+		MSM_BUS_CLK_HALT_FIELDSIZE))\
+
+#define RPM_BUS_SLAVE_REQ	0x766c7362
+#define RPM_BUS_MASTER_REQ	0x73616d62
+
+enum msm_bus_rpm_slave_field_type {
+	RPM_SLAVE_FIELD_BW = 0x00007762,
+};
+
+enum msm_bus_rpm_mas_field_type {
+	RPM_MASTER_FIELD_BW =		0x00007762,
+	RPM_MASTER_FIELD_BW_T0 =	0x30747762,
+	RPM_MASTER_FIELD_BW_T1 =	0x31747762,
+	RPM_MASTER_FIELD_BW_T2 =	0x32747762,
+};
+
+#include <dt-bindings/msm/msm-bus-ids.h>
+
+
+#endif /*__ASM_ARCH_MSM_BUS_BOARD_H */
diff --git a/include/linux/msm-bus.h b/include/linux/msm-bus.h
new file mode 100644
index 000000000000..8ea8c97f4972
--- /dev/null
+++ b/include/linux/msm-bus.h
@@ -0,0 +1,213 @@
+/* Copyright (c) 2010-2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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 _ARCH_ARM_MACH_MSM_BUS_H
+#define _ARCH_ARM_MACH_MSM_BUS_H
+
+#include <linux/types.h>
+#include <linux/input.h>
+#include <linux/platform_device.h>
+
+/*
+ * Macros for clients to convert their data to ib and ab
+ * Ws : Time window over which to transfer the data in SECONDS
+ * Bs : Size of the data block in bytes
+ * Per : Recurrence period
+ * Tb : Throughput bandwidth to prevent stalling
+ * R  : Ratio of actual bandwidth used to Tb
+ * Ib : Instantaneous bandwidth
+ * Ab : Arbitrated bandwidth
+ *
+ * IB_RECURRBLOCK and AB_RECURRBLOCK:
+ * These are used if the requirement is to transfer a
+ * recurring block of data over a known time window.
+ *
+ * IB_THROUGHPUTBW and AB_THROUGHPUTBW:
+ * These are used for CPU style masters. Here the requirement
+ * is to have minimum throughput bandwidth available to avoid
+ * stalling.
+ */
+#define IB_RECURRBLOCK(Ws, Bs) ((Ws) == 0 ? 0 : ((Bs)/(Ws)))
+#define AB_RECURRBLOCK(Ws, Per) ((Ws) == 0 ? 0 : ((Bs)/(Per)))
+#define IB_THROUGHPUTBW(Tb) (Tb)
+#define AB_THROUGHPUTBW(Tb, R) ((Tb) * (R))
+
+struct msm_bus_vectors {
+	int src; /* Master */
+	int dst; /* Slave */
+	uint64_t ab; /* Arbitrated bandwidth */
+	uint64_t ib; /* Instantaneous bandwidth */
+};
+
+struct msm_bus_paths {
+	int num_paths;
+	struct msm_bus_vectors *vectors;
+};
+
+struct msm_bus_scale_pdata {
+	struct msm_bus_paths *usecase;
+	int num_usecases;
+	const char *name;
+	/*
+	 * If the active_only flag is set to 1, the BW request is applied
+	 * only when at least one CPU is active (powered on). If the flag
+	 * is set to 0, then the BW request is always applied irrespective
+	 * of the CPU state.
+	 */
+	unsigned int active_only;
+};
+
+struct msm_bus_client_handle {
+	char *name;
+	int mas;
+	int slv;
+	int first_hop;
+	struct device *mas_dev;
+	u64 cur_act_ib;
+	u64 cur_act_ab;
+	u64 cur_slp_ib;
+	u64 cur_slp_ab;
+	bool active_only;
+};
+
+/* Scaling APIs */
+
+/*
+ * This function returns a handle to the client. This should be used to
+ * call msm_bus_scale_client_update_request.
+ * The function returns 0 if bus driver is unable to register a client
+ */
+
+#if (defined(CONFIG_QCOM_BUS_SCALING) || defined(CONFIG_QCOM_BUS_TOPOLOGY_ADHOC))
+int __init msm_bus_fabric_init_driver(void);
+uint32_t msm_bus_scale_register_client(struct msm_bus_scale_pdata *pdata);
+int msm_bus_scale_client_update_request(uint32_t cl, unsigned int index);
+void msm_bus_scale_unregister_client(uint32_t cl);
+int msm_bus_scale_client_update_context(uint32_t cl, bool active_only,
+							unsigned int ctx_idx);
+
+struct msm_bus_client_handle*
+msm_bus_scale_register(uint32_t mas, uint32_t slv, char *name,
+							bool active_only);
+void msm_bus_scale_unregister(struct msm_bus_client_handle *cl);
+int msm_bus_scale_update_bw(struct msm_bus_client_handle *cl, u64 ab, u64 ib);
+int msm_bus_scale_update_bw_context(struct msm_bus_client_handle *cl,
+		u64 act_ab, u64 act_ib, u64 slp_ib, u64 slp_ab);
+/* AXI Port configuration APIs */
+int msm_bus_axi_porthalt(int master_port);
+int msm_bus_axi_portunhalt(int master_port);
+
+#else
+static inline int __init msm_bus_fabric_init_driver(void) { return 0; }
+static struct msm_bus_client_handle dummy_cl;
+
+static inline uint32_t
+msm_bus_scale_register_client(struct msm_bus_scale_pdata *pdata)
+{
+	return 1;
+}
+
+static inline int
+msm_bus_scale_client_update_request(uint32_t cl, unsigned int index)
+{
+	return 0;
+}
+
+static inline int
+msm_bus_scale_client_update_context(uint32_t cl, bool active_only,
+							unsigned int ctx_idx)
+{
+	return 0;
+}
+
+static inline void
+msm_bus_scale_unregister_client(uint32_t cl)
+{
+}
+
+static inline int msm_bus_axi_porthalt(int master_port)
+{
+	return 0;
+}
+
+static inline int msm_bus_axi_portunhalt(int master_port)
+{
+	return 0;
+}
+
+static inline struct msm_bus_client_handle*
+msm_bus_scale_register(uint32_t mas, uint32_t slv, char *name,
+							bool active_only)
+{
+	return &dummy_cl;
+}
+
+static inline void msm_bus_scale_unregister(struct msm_bus_client_handle *cl)
+{
+}
+
+static inline int
+msm_bus_scale_update_bw(struct msm_bus_client_handle *cl, u64 ab, u64 ib)
+{
+	return 0;
+}
+
+static inline int
+msm_bus_scale_update_bw_context(struct msm_bus_client_handle *cl, u64 act_ab,
+				u64 act_ib, u64 slp_ib, u64 slp_ab)
+
+{
+	return 0;
+}
+
+#endif
+
+#if defined(CONFIG_OF) && defined(CONFIG_QCOM_BUS_SCALING)
+struct msm_bus_scale_pdata *msm_bus_pdata_from_node(
+		struct platform_device *pdev, struct device_node *of_node);
+struct msm_bus_scale_pdata *msm_bus_cl_get_pdata(struct platform_device *pdev);
+void msm_bus_cl_clear_pdata(struct msm_bus_scale_pdata *pdata);
+#else
+static inline struct msm_bus_scale_pdata
+*msm_bus_cl_get_pdata(struct platform_device *pdev)
+{
+	return NULL;
+}
+
+static inline struct msm_bus_scale_pdata *msm_bus_pdata_from_node(
+		struct platform_device *pdev, struct device_node *of_node)
+{
+	return NULL;
+}
+
+static inline void msm_bus_cl_clear_pdata(struct msm_bus_scale_pdata *pdata)
+{
+}
+#endif
+
+#ifdef CONFIG_DEBUG_BUS_VOTER
+int msm_bus_floor_vote_context(const char *name, u64 floor_hz,
+						bool active_only);
+int msm_bus_floor_vote(const char *name, u64 floor_hz);
+#else
+static inline int msm_bus_floor_vote(const char *name, u64 floor_hz)
+{
+	return -EINVAL;
+}
+
+static inline int msm_bus_floor_vote_context(const char *name, u64 floor_hz,
+						bool active_only)
+{
+	return -EINVAL;
+}
+#endif /*defined(CONFIG_DEBUG_BUS_VOTER) && defined(CONFIG_BUS_TOPOLOGY_ADHOC)*/
+#endif /*_ARCH_ARM_MACH_MSM_BUS_H*/
diff --git a/include/linux/msm_bus_rules.h b/include/linux/msm_bus_rules.h
new file mode 100644
index 000000000000..6bcbca081fe8
--- /dev/null
+++ b/include/linux/msm_bus_rules.h
@@ -0,0 +1,91 @@
+/* Copyright (c) 2014-2015, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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 _ARCH_ARM_MACH_MSM_BUS_RULES_H
+#define _ARCH_ARM_MACH_MSM_BUS_RULES_H
+
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/notifier.h>
+#include <dt-bindings/msm/msm-bus-rule-ops.h>
+
+#define MAX_NODES		(5)
+
+struct rule_update_path_info {
+	u32 id;
+	u64 ab;
+	u64 ib;
+	u64 clk;
+	bool added;
+	struct list_head link;
+};
+
+struct rule_apply_rcm_info {
+	u32 id;
+	u64 lim_bw;
+	int throttle;
+	bool after_clk_commit;
+	struct list_head link;
+};
+
+struct bus_rule_type {
+	int num_src;
+	int *src_id;
+	int src_field;
+	int op;
+	u64 thresh;
+	int num_dst;
+	int *dst_node;
+	u64 dst_bw;
+	int mode;
+	void *client_data;
+};
+
+#if (defined(CONFIG_QCOM_BUS_TOPOLOGY_ADHOC))
+void msm_rule_register(int num_rules, struct bus_rule_type *rule,
+				struct notifier_block *nb);
+void msm_rule_unregister(int num_rules, struct bus_rule_type *rule,
+						struct notifier_block *nb);
+bool msm_rule_update(struct bus_rule_type *old_rule,
+				struct bus_rule_type *new_rule,
+				struct notifier_block *nb);
+void msm_rule_evaluate_rules(int node);
+void print_rules_buf(char *buf, int count);
+bool msm_rule_are_rules_registered(void);
+#else
+static inline void msm_rule_register(int num_rules, struct bus_rule_type *rule,
+				struct notifier_block *nb)
+{
+}
+static inline void msm_rule_unregister(int num_rules,
+					struct bus_rule_type *rule,
+					struct notifier_block *nb)
+{
+}
+static inline void print_rules_buf(char *buf, int count)
+{
+}
+static inline bool msm_rule_are_rules_registered(void)
+{
+	return false;
+}
+static inline bool msm_rule_update(struct bus_rule_type *old_rule,
+					struct bus_rule_type *new_rule,
+					struct notifier_block *nb)
+{
+	return false;
+}
+static inline void msm_rule_evaluate_rules(int node)
+{
+}
+#endif /* defined(CONFIG_BUS_TOPOLOGY_ADHOC) */
+#endif /* _ARCH_ARM_MACH_MSM_BUS_RULES_H */