LXR linux/drivers/hwtracing/stm/stm.h

   1/*
   2 * System Trace Module (STM) infrastructure
   3 * Copyright (c) 2014, Intel Corporation.
   4 *
   5 * This program is free software; you can redistribute it and/or modify it
   6 * under the terms and conditions of the GNU General Public License,
   7 * version 2, as published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope it will be useful, but WITHOUT
  10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12 * more details.
  13 *
  14 * STM class implements generic infrastructure for  System Trace Module devices
  15 * as defined in MIPI STPv2 specification.
  16 */
  17
  18#ifndef _STM_STM_H_
  19#define _STM_STM_H_
  20
  21struct stp_policy;
  22struct stp_policy_node;
  23
  24struct stp_policy_node *
  25stp_policy_node_lookup(struct stm_device *stm, char *s);
  26void stp_policy_node_put(struct stp_policy_node *policy_node);
  27void stp_policy_unbind(struct stp_policy *policy);
  28
  29void stp_policy_node_get_ranges(struct stp_policy_node *policy_node,
  30                                unsigned int *mstart, unsigned int *mend,
  31                                unsigned int *cstart, unsigned int *cend);
  32int stp_configfs_init(void);
  33void stp_configfs_exit(void);
  34
  35struct stp_master {
  36        unsigned int    nr_free;
  37        unsigned long   chan_map[0];
  38};
  39
  40struct stm_device {
  41        struct device           dev;
  42        struct module           *owner;
  43        struct stp_policy       *policy;
  44        struct mutex            policy_mutex;
  45        int                     major;
  46        unsigned int            sw_nmasters;
  47        struct stm_data         *data;
  48        struct mutex            link_mutex;
  49        spinlock_t              link_lock;
  50        struct list_head        link_list;
  51        /* master allocation */
  52        spinlock_t              mc_lock;
  53        struct stp_master       *masters[0];
  54};
  55
  56#define to_stm_device(_d)                               \
  57        container_of((_d), struct stm_device, dev)
  58
  59struct stm_output {
  60        spinlock_t              lock;
  61        unsigned int            master;
  62        unsigned int            channel;
  63        unsigned int            nr_chans;
  64};
  65
  66struct stm_file {
  67        struct stm_device       *stm;
  68        struct stp_policy_node  *policy_node;
  69        struct stm_output       output;
  70};
  71
  72struct stm_device *stm_find_device(const char *name);
  73void stm_put_device(struct stm_device *stm);
  74
  75struct stm_source_device {
  76        struct device           dev;
  77        struct stm_source_data  *data;
  78        spinlock_t              link_lock;
  79        struct stm_device __rcu *link;
  80        struct list_head        link_entry;
  81        /* one output per stm_source device */
  82        struct stp_policy_node  *policy_node;
  83        struct stm_output       output;
  84};
  85
  86#define to_stm_source_device(_d)                                \
  87        container_of((_d), struct stm_source_device, dev)
  88
  89#endif /* _STM_STM_H_ */
  90