diff options
| author | Cezary Rojewski <cezary.rojewski@intel.com> | 2022-12-02 16:28:40 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-12-05 14:05:32 +0000 |
| commit | 870f6e5abba95ac78e750b61cf8f3f15be96796f (patch) | |
| tree | 3b30d2f87f17224eb2f66fe488cbe43220800f6b /sound | |
| parent | 34d27c71707c4ed615105376e0f3907d99b1b271 (diff) | |
ASoC: Intel: avs: Allow for dumping FW_REGS area
SRAM0 window begins with a block of memory, usually of size PAGE_SIZE,
dedicated to the base firmware registers. When debugging firmware, it is
desirable to be able to dump them at will.
Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Link: https://lore.kernel.org/r/20221202152841.672536-16-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/intel/avs/debugfs.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/sound/soc/intel/avs/debugfs.c b/sound/soc/intel/avs/debugfs.c index e7b0b99824aa..e9042d4328c4 100644 --- a/sound/soc/intel/avs/debugfs.c +++ b/sound/soc/intel/avs/debugfs.c @@ -48,6 +48,29 @@ void avs_dump_fw_log_wakeup(struct avs_dev *adev, const void __iomem *src, unsig wake_up(&adev->trace_waitq); } +static ssize_t fw_regs_read(struct file *file, char __user *to, size_t count, loff_t *ppos) +{ + struct avs_dev *adev = file->private_data; + char *buf; + int ret; + + buf = kzalloc(AVS_FW_REGS_SIZE, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + memcpy_fromio(buf, avs_sram_addr(adev, AVS_FW_REGS_WINDOW), AVS_FW_REGS_SIZE); + + ret = simple_read_from_buffer(to, count, ppos, buf, AVS_FW_REGS_SIZE); + kfree(buf); + return ret; +} + +static const struct file_operations fw_regs_fops = { + .open = simple_open, + .read = fw_regs_read, + .llseek = no_llseek, +}; + static ssize_t probe_points_read(struct file *file, char __user *to, size_t count, loff_t *ppos) { struct avs_dev *adev = file->private_data; @@ -369,6 +392,7 @@ void avs_debugfs_init(struct avs_dev *adev) debugfs_create_file("strace", 0444, adev->debugfs_root, adev, &strace_fops); debugfs_create_file("trace_control", 0644, adev->debugfs_root, adev, &trace_control_fops); + debugfs_create_file("fw_regs", 0444, adev->debugfs_root, adev, &fw_regs_fops); debugfs_create_u32("trace_aging_period", 0644, adev->debugfs_root, &adev->aging_timer_period); |