lib/trace_readwrite.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Register read and write tracepoints
   4  *
   5  * Copyright (c) 2021-2022 Qualcomm Innovation Center, Inc. All rights reserved.
   6  */
   7
   8 #include <linux/ftrace.h>
   9 #include <linux/module.h>
  10 #include <asm-generic/io.h>
  11
  12 #define CREATE_TRACE_POINTS
  13 #include <trace/events/rwmmio.h>
  14
  15 #ifdef CONFIG_TRACE_MMIO_ACCESS
  16 void log_write_mmio(u64 val, u8 width, volatile void __iomem *addr,
  17                     unsigned long caller_addr)
  18 {
  19         trace_rwmmio_write(caller_addr, val, width, addr);
  20 }
  21 EXPORT_SYMBOL_GPL(log_write_mmio);
  22 EXPORT_TRACEPOINT_SYMBOL_GPL(rwmmio_write);
  23
  24 void log_post_write_mmio(u64 val, u8 width, volatile void __iomem *addr,
  25                          unsigned long caller_addr)
  26 {
  27         trace_rwmmio_post_write(caller_addr, val, width, addr);
  28 }
  29 EXPORT_SYMBOL_GPL(log_post_write_mmio);
  30 EXPORT_TRACEPOINT_SYMBOL_GPL(rwmmio_post_write);
  31
  32 void log_read_mmio(u8 width, const volatile void __iomem *addr,
  33                    unsigned long caller_addr)
  34 {
  35         trace_rwmmio_read(caller_addr, width, addr);
  36 }
  37 EXPORT_SYMBOL_GPL(log_read_mmio);
  38 EXPORT_TRACEPOINT_SYMBOL_GPL(rwmmio_read);
  39
  40 void log_post_read_mmio(u64 val, u8 width, const volatile void __iomem *addr,
  41                         unsigned long caller_addr)
  42 {
  43         trace_rwmmio_post_read(caller_addr, val, width, addr);
  44 }
  45 EXPORT_SYMBOL_GPL(log_post_read_mmio);
  46 EXPORT_TRACEPOINT_SYMBOL_GPL(rwmmio_post_read);
  47 #endif /* CONFIG_TRACE_MMIO_ACCESS */