drivers/hwtracing/coresight/coresight-priv.h

   1 /* Copyright (c) 2011-2012, The Linux Foundation. All rights reserved.
   2  *
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License version 2 and
   5  * only version 2 as published by the Free Software Foundation.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  */
  12
  13 #ifndef _CORESIGHT_PRIV_H
  14 #define _CORESIGHT_PRIV_H
  15
  16 #include <linux/bitops.h>
  17 #include <linux/io.h>
  18 #include <linux/coresight.h>
  19
  20 /*
  21  * Coresight management registers (0xf00-0xfcc)
  22  * 0xfa0 - 0xfa4: Management    registers in PFTv1.0
  23  *                Trace         registers in PFTv1.1
  24  */
  25 #define CORESIGHT_ITCTRL        0xf00
  26 #define CORESIGHT_CLAIMSET      0xfa0
  27 #define CORESIGHT_CLAIMCLR      0xfa4
  28 #define CORESIGHT_LAR           0xfb0
  29 #define CORESIGHT_LSR           0xfb4
  30 #define CORESIGHT_AUTHSTATUS    0xfb8
  31 #define CORESIGHT_DEVID         0xfc8
  32 #define CORESIGHT_DEVTYPE       0xfcc
  33
  34 #define TIMEOUT_US              100
  35 #define BMVAL(val, lsb, msb)    ((val & GENMASK(msb, lsb)) >> lsb)
  36
  37 #define ETM_MODE_EXCL_KERN      BIT(30)
  38 #define ETM_MODE_EXCL_USER      BIT(31)
  39
  40 #define coresight_simple_func(type, name, offset)                       \
  41 static ssize_t name##_show(struct device *_dev,                         \
  42                            struct device_attribute *attr, char *buf)    \
  43 {                                                                       \
  44         type *drvdata = dev_get_drvdata(_dev->parent);                  \
  45         return scnprintf(buf, PAGE_SIZE, "0x%x\n",                      \
  46                          readl_relaxed(drvdata->base + offset));        \
  47 }                                                                       \
  48 static DEVICE_ATTR_RO(name)
  49
  50 enum cs_mode {
  51         CS_MODE_DISABLED,
  52         CS_MODE_SYSFS,
  53         CS_MODE_PERF,
  54 };
  55
  56 /**
  57  * struct cs_buffer - keep track of a recording session' specifics
  58  * @cur:        index of the current buffer
  59  * @nr_pages:   max number of pages granted to us
  60  * @offset:     offset within the current buffer
  61  * @data_size:  how much we collected in this run
  62  * @lost:       other than zero if we had a HW buffer wrap around
  63  * @snapshot:   is this run in snapshot mode
  64  * @data_pages: a handle the ring buffer
  65  */
  66 struct cs_buffers {
  67         unsigned int            cur;
  68         unsigned int            nr_pages;
  69         unsigned long           offset;
  70         local_t                 data_size;
  71         local_t                 lost;
  72         bool                    snapshot;
  73         void                    **data_pages;
  74 };
  75
  76 static inline void CS_LOCK(void __iomem *addr)
  77 {
  78         do {
  79                 /* Wait for things to settle */
  80                 mb();
  81                 writel_relaxed(0x0, addr + CORESIGHT_LAR);
  82         } while (0);
  83 }
  84
  85 static inline void CS_UNLOCK(void __iomem *addr)
  86 {
  87         do {
  88                 writel_relaxed(CORESIGHT_UNLOCK, addr + CORESIGHT_LAR);
  89                 /* Make sure everyone has seen this */
  90                 mb();
  91         } while (0);
  92 }
  93
  94 void coresight_disable_path(struct list_head *path);
  95 int coresight_enable_path(struct list_head *path, u32 mode);
  96 struct coresight_device *coresight_get_sink(struct list_head *path);
  97 struct list_head *coresight_build_path(struct coresight_device *csdev);
  98 void coresight_release_path(struct list_head *path);
  99
 100 #ifdef CONFIG_CORESIGHT_SOURCE_ETM3X
 101 extern int etm_readl_cp14(u32 off, unsigned int *val);
 102 extern int etm_writel_cp14(u32 off, u32 val);
 103 #else
 104 static inline int etm_readl_cp14(u32 off, unsigned int *val) { return 0; }
 105 static inline int etm_writel_cp14(u32 off, u32 val) { return 0; }
 106 #endif
 107
 108 #endif