Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 132 insertions, 0 deletions

diff --git a/sound/soc/sof/ipc4-priv.h b/sound/soc/sof/ipc4-priv.h
new file mode 100644
index 000000000..a8cdf9bc7
--- /dev/null
+++ b/sound/soc/sof/ipc4-priv.h
@@ -0,0 +1,132 @@
+/* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
+/*
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * Copyright(c) 2022 Intel Corporation
+ */
+
+#ifndef __SOUND_SOC_SOF_IPC4_PRIV_H
+#define __SOUND_SOC_SOF_IPC4_PRIV_H
+
+#include <linux/idr.h>
+#include <sound/sof/ext_manifest4.h>
+#include <sound/sof/ipc4/header.h>
+#include "sof-priv.h"
+
+/* The DSP window indices are fixed */
+#define SOF_IPC4_INBOX_WINDOW_IDX	0
+#define SOF_IPC4_OUTBOX_WINDOW_IDX	1
+#define SOF_IPC4_DEBUG_WINDOW_IDX	2
+
+enum sof_ipc4_mtrace_type {
+	SOF_IPC4_MTRACE_NOT_AVAILABLE = 0,
+	SOF_IPC4_MTRACE_INTEL_CAVS_1_5,
+	SOF_IPC4_MTRACE_INTEL_CAVS_1_8,
+	SOF_IPC4_MTRACE_INTEL_CAVS_2,
+};
+
+/**
+ * struct sof_ipc4_fw_module - IPC4 module info
+ * @sof_man4_module: Module info
+ * @fw_mod_cfg: Pointer to the module config start of the module
+ * @m_ida: Module instance identifier
+ * @private: Module private data
+ */
+struct sof_ipc4_fw_module {
+	struct sof_man4_module man4_module_entry;
+	const struct sof_man4_module_config *fw_mod_cfg;
+	struct ida m_ida;
+	void *private;
+};
+
+/**
+ * struct sof_ipc4_fw_library - IPC4 library information
+ * @sof_fw: SOF Firmware of the library
+ * @id: Library ID. 0 is reserved for basefw, external libraries must have unique
+ *	ID number between 1 and (sof_ipc4_fw_data.max_libs_count - 1)
+ *	Note: sof_ipc4_fw_data.max_libs_count == 1 implies that external libraries
+ *	are not supported
+ * @num_modules : Number of FW modules in the library
+ * @modules: Array of FW modules
+ */
+struct sof_ipc4_fw_library {
+	struct sof_firmware sof_fw;
+	const char *name;
+	u32 id;
+	int num_modules;
+	struct sof_ipc4_fw_module *modules;
+};
+
+/**
+ * struct sof_ipc4_fw_data - IPC4-specific data
+ * @manifest_fw_hdr_offset: FW header offset in the manifest
+ * @fw_lib_xa: XArray for firmware libraries, including basefw (ID = 0)
+ *	       Used to store the FW libraries and to manage the unique IDs of the
+ *	       libraries.
+ * @nhlt: NHLT table either from the BIOS or the topology manifest
+ * @mtrace_type: mtrace type supported on the booted platform
+ * @mtrace_log_bytes: log bytes as reported by the firmware via fw_config reply
+ * @num_playback_streams: max number of playback DMAs, needed for CHAIN_DMA offset
+ * @num_capture_streams: max number of capture DMAs
+ * @max_num_pipelines: max number of pipelines
+ * @max_libs_count: Maximum number of libraries support by the FW including the
+ *		    base firmware
+ * @fw_context_save: Firmware supports full context save and restore
+ * @libraries_restored: The libraries have been retained during firmware boot
+ *
+ * @load_library: Callback function for platform dependent library loading
+ * @pipeline_state_mutex: Mutex to protect pipeline triggers, ref counts, states and deletion
+ */
+struct sof_ipc4_fw_data {
+	u32 manifest_fw_hdr_offset;
+	struct xarray fw_lib_xa;
+	void *nhlt;
+	enum sof_ipc4_mtrace_type mtrace_type;
+	u32 mtrace_log_bytes;
+	int num_playback_streams;
+	int num_capture_streams;
+	int max_num_pipelines;
+	u32 max_libs_count;
+	bool fw_context_save;
+	bool libraries_restored;
+
+	int (*load_library)(struct snd_sof_dev *sdev,
+			    struct sof_ipc4_fw_library *fw_lib, bool reload);
+	void (*intel_configure_mic_privacy)(struct snd_sof_dev *sdev,
+					    struct sof_ipc4_intel_mic_privacy_cap *caps);
+	struct mutex pipeline_state_mutex; /* protect pipeline triggers, ref counts and states */
+};
+
+extern const struct sof_ipc_fw_loader_ops ipc4_loader_ops;
+extern const struct sof_ipc_tplg_ops ipc4_tplg_ops;
+extern const struct sof_ipc_tplg_control_ops tplg_ipc4_control_ops;
+extern const struct sof_ipc_pcm_ops ipc4_pcm_ops;
+extern const struct sof_ipc_fw_tracing_ops ipc4_mtrace_ops;
+
+int sof_ipc4_set_pipeline_state(struct snd_sof_dev *sdev, u32 instance_id, u32 state);
+int sof_ipc4_mtrace_update_pos(struct snd_sof_dev *sdev, int core);
+
+int sof_ipc4_complete_split_release(struct snd_sof_dev *sdev);
+int sof_ipc4_query_fw_configuration(struct snd_sof_dev *sdev);
+int sof_ipc4_reload_fw_libraries(struct snd_sof_dev *sdev);
+struct sof_ipc4_fw_module *sof_ipc4_find_module_by_uuid(struct snd_sof_dev *sdev,
+							const guid_t *uuid);
+
+struct snd_sof_widget *sof_ipc4_find_swidget_by_ids(struct snd_sof_dev *sdev,
+						    u32 module_id, int instance_id);
+
+struct sof_ipc4_base_module_cfg;
+void sof_ipc4_update_cpc_from_manifest(struct snd_sof_dev *sdev,
+				       struct sof_ipc4_fw_module *fw_module,
+				       struct sof_ipc4_base_module_cfg *basecfg);
+
+size_t sof_ipc4_find_debug_slot_offset_by_type(struct snd_sof_dev *sdev,
+					       u32 slot_type);
+
+void sof_ipc4_mic_privacy_state_change(struct snd_sof_dev *sdev, bool state);
+
+enum sof_ipc4_pipeline_state;
+const char *sof_ipc4_pipeline_state_str(enum sof_ipc4_pipeline_state state);
+
+#endif