Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3) // This file is provided under a dual BSD/GPLv2 license.  When using or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4) // redistributing this file, you may do so under either license.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6) // Copyright(c) 2018 Intel Corporation. All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) // Author: Liam Girdwood <liam.r.girdwood@linux.intel.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) //
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/debugfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/sched/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include "sof-priv.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include "ops.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) static size_t sof_trace_avail(struct snd_sof_dev *sdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) 			      loff_t pos, size_t buffer_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 	loff_t host_offset = READ_ONCE(sdev->host_offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 	 * If host offset is less than local pos, it means write pointer of
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) 	 * host DMA buffer has been wrapped. We should output the trace data
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) 	 * at the end of host DMA buffer at first.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 	if (host_offset < pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) 		return buffer_size - pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) 	/* If there is available trace data now, it is unnecessary to wait. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 	if (host_offset > pos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) 		return host_offset - pos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) static size_t sof_wait_trace_avail(struct snd_sof_dev *sdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 				   loff_t pos, size_t buffer_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	wait_queue_entry_t wait;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	size_t ret = sof_trace_avail(sdev, pos, buffer_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	/* data immediately available */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 	if (!sdev->dtrace_is_enabled && sdev->dtrace_draining) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 		/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		 * tracing has ended and all traces have been
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		 * read by client, return EOF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 		 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) 		sdev->dtrace_draining = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	/* wait for available trace data from FW */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	init_waitqueue_entry(&wait, current);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	set_current_state(TASK_INTERRUPTIBLE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	add_wait_queue(&sdev->trace_sleep, &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	if (!signal_pending(current)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) 		/* set timeout to max value, no error code */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 		schedule_timeout(MAX_SCHEDULE_TIMEOUT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	remove_wait_queue(&sdev->trace_sleep, &wait);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	return sof_trace_avail(sdev, pos, buffer_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) static ssize_t sof_dfsentry_trace_read(struct file *file, char __user *buffer,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 				       size_t count, loff_t *ppos)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	struct snd_sof_dfsentry *dfse = file->private_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 	struct snd_sof_dev *sdev = dfse->sdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 	unsigned long rem;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	loff_t lpos = *ppos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	size_t avail, buffer_size = dfse->size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	u64 lpos_64;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) 	/* make sure we know about any failures on the DSP side */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 	sdev->dtrace_error = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	/* check pos and count */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	if (lpos < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	if (!count)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	/* check for buffer wrap and count overflow */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	lpos_64 = lpos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	lpos = do_div(lpos_64, buffer_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	if (count > buffer_size - lpos) /* min() not used to avoid sparse warnings */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 		count = buffer_size - lpos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	/* get available count based on current host offset */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	avail = sof_wait_trace_avail(sdev, lpos, buffer_size);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	if (sdev->dtrace_error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 		dev_err(sdev->dev, "error: trace IO error\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 		return -EIO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	/* make sure count is <= avail */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	count = avail > count ? count : avail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 	/* copy available trace data to debugfs */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	rem = copy_to_user(buffer, ((u8 *)(dfse->buf) + lpos), count);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	if (rem)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 		return -EFAULT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	*ppos += count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	/* move debugfs reading position */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 	return count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) static int sof_dfsentry_trace_release(struct inode *inode, struct file *file)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	struct snd_sof_dfsentry *dfse = inode->i_private;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	struct snd_sof_dev *sdev = dfse->sdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	/* avoid duplicate traces at next open */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 	if (!sdev->dtrace_is_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 		sdev->host_offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) static const struct file_operations sof_dfs_trace_fops = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 	.open = simple_open,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	.read = sof_dfsentry_trace_read,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 	.llseek = default_llseek,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 	.release = sof_dfsentry_trace_release,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) static int trace_debugfs_create(struct snd_sof_dev *sdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 	struct snd_sof_dfsentry *dfse;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 	if (!sdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 	dfse = devm_kzalloc(sdev->dev, sizeof(*dfse), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (!dfse)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	dfse->type = SOF_DFSENTRY_TYPE_BUF;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	dfse->buf = sdev->dmatb.area;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	dfse->size = sdev->dmatb.bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	dfse->sdev = sdev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 	debugfs_create_file("trace", 0444, sdev->debugfs_root, dfse,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 			    &sof_dfs_trace_fops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) int snd_sof_init_trace_ipc(struct snd_sof_dev *sdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	struct sof_ipc_fw_ready *ready = &sdev->fw_ready;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	struct sof_ipc_fw_version *v = &ready->version;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 	struct sof_ipc_dma_trace_params_ext params;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	struct sof_ipc_reply ipc_reply;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	if (!sdev->dtrace_is_supported)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 	if (sdev->dtrace_is_enabled || !sdev->dma_trace_pages)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	/* set IPC parameters */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	params.hdr.cmd = SOF_IPC_GLB_TRACE_MSG;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 	/* PARAMS_EXT is only supported from ABI 3.7.0 onwards */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	if (v->abi_version >= SOF_ABI_VER(3, 7, 0)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 		params.hdr.size = sizeof(struct sof_ipc_dma_trace_params_ext);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 		params.hdr.cmd |= SOF_IPC_TRACE_DMA_PARAMS_EXT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 		params.timestamp_ns = ktime_get(); /* in nanosecond */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	} else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 		params.hdr.size = sizeof(struct sof_ipc_dma_trace_params);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 		params.hdr.cmd |= SOF_IPC_TRACE_DMA_PARAMS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	params.buffer.phy_addr = sdev->dmatp.addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 	params.buffer.size = sdev->dmatb.bytes;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	params.buffer.pages = sdev->dma_trace_pages;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	params.stream_tag = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 	sdev->host_offset = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	sdev->dtrace_draining = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	ret = snd_sof_dma_trace_init(sdev, &params.stream_tag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 		dev_err(sdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 			"error: fail in snd_sof_dma_trace_init %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	dev_dbg(sdev->dev, "stream_tag: %d\n", params.stream_tag);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	/* send IPC to the DSP */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	ret = sof_ipc_tx_message(sdev->ipc,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 				 params.hdr.cmd, &params, sizeof(params),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 				 &ipc_reply, sizeof(ipc_reply));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 		dev_err(sdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 			"error: can't set params for DMA for trace %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 		goto trace_release;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 	ret = snd_sof_dma_trace_trigger(sdev, SNDRV_PCM_TRIGGER_START);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 		dev_err(sdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 			"error: snd_sof_dma_trace_trigger: start: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		goto trace_release;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	sdev->dtrace_is_enabled = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) trace_release:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 	snd_sof_dma_trace_release(sdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) int snd_sof_init_trace(struct snd_sof_dev *sdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	if (!sdev->dtrace_is_supported)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	/* set false before start initialization */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 	sdev->dtrace_is_enabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	/* allocate trace page table buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) 	ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV, sdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 				  PAGE_SIZE, &sdev->dmatp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) 		dev_err(sdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 			"error: can't alloc page table for trace %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	/* allocate trace data buffer */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	ret = snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV_SG, sdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 				  DMA_BUF_SIZE_FOR_TRACE, &sdev->dmatb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 		dev_err(sdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 			"error: can't alloc buffer for trace %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 		goto page_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	/* create compressed page table for audio firmware */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	ret = snd_sof_create_page_table(sdev->dev, &sdev->dmatb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 					sdev->dmatp.area, sdev->dmatb.bytes);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 		goto table_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	sdev->dma_trace_pages = ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	dev_dbg(sdev->dev, "dma_trace_pages: %d\n", sdev->dma_trace_pages);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	if (sdev->first_boot) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 		ret = trace_debugfs_create(sdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 			goto table_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	init_waitqueue_head(&sdev->trace_sleep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	ret = snd_sof_init_trace_ipc(sdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 		goto table_err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) table_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 	sdev->dma_trace_pages = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	snd_dma_free_pages(&sdev->dmatb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) page_err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	snd_dma_free_pages(&sdev->dmatp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) EXPORT_SYMBOL(snd_sof_init_trace);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) int snd_sof_trace_update_pos(struct snd_sof_dev *sdev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 			     struct sof_ipc_dma_trace_posn *posn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	if (!sdev->dtrace_is_supported)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	if (sdev->dtrace_is_enabled && sdev->host_offset != posn->host_offset) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		sdev->host_offset = posn->host_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 		wake_up(&sdev->trace_sleep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	if (posn->overflow != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 		dev_err(sdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 			"error: DSP trace buffer overflow %u bytes. Total messages %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 			posn->overflow, posn->messages);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) /* an error has occurred within the DSP that prevents further trace */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) void snd_sof_trace_notify_for_error(struct snd_sof_dev *sdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	if (!sdev->dtrace_is_supported)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 	if (sdev->dtrace_is_enabled) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		dev_err(sdev->dev, "error: waking up any trace sleepers\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 		sdev->dtrace_error = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 		wake_up(&sdev->trace_sleep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) EXPORT_SYMBOL(snd_sof_trace_notify_for_error);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) void snd_sof_release_trace(struct snd_sof_dev *sdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	if (!sdev->dtrace_is_supported || !sdev->dtrace_is_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	ret = snd_sof_dma_trace_trigger(sdev, SNDRV_PCM_TRIGGER_STOP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 		dev_err(sdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 			"error: snd_sof_dma_trace_trigger: stop: %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	ret = snd_sof_dma_trace_release(sdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 		dev_err(sdev->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 			"error: fail in snd_sof_dma_trace_release %d\n", ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	sdev->dtrace_is_enabled = false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	sdev->dtrace_draining = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 	wake_up(&sdev->trace_sleep);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) EXPORT_SYMBOL(snd_sof_release_trace);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) void snd_sof_free_trace(struct snd_sof_dev *sdev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 	if (!sdev->dtrace_is_supported)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 	snd_sof_release_trace(sdev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	if (sdev->dma_trace_pages) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 		snd_dma_free_pages(&sdev->dmatb);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 		snd_dma_free_pages(&sdev->dmatp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 		sdev->dma_trace_pages = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) EXPORT_SYMBOL(snd_sof_free_trace);