accel/ivpu: Add firmware tracing support

Add support for firmware tracing and logging via debugfs.

Signed-off-by: Stanislaw Gruszka <stanislaw.gruszka@linux.intel.com>
Reviewed-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230524074847.866711-3-stanislaw.gruszka@linux.intel.com

drivers/accel/ivpu/Makefile

@@ -5,6 +5,7 @@ intel_vpu-y := \
 	ivpu_debugfs.o \
 	ivpu_drv.o \
 	ivpu_fw.o \
+	ivpu_fw_log.o \
 	ivpu_gem.o \
 	ivpu_hw_mtl.o \
 	ivpu_ipc.o \
@@ -14,4 +15,4 @@ intel_vpu-y := \
 	ivpu_mmu_context.o \
 	ivpu_pm.o
 
-obj-$(CONFIG_DRM_ACCEL_IVPU) += intel_vpu.o
+obj-$(CONFIG_DRM_ACCEL_IVPU) += intel_vpu.o

drivers/accel/ivpu/ivpu_debugfs.c

@@ -11,6 +11,8 @@
 
 #include "ivpu_debugfs.h"
 #include "ivpu_drv.h"
+#include "ivpu_fw.h"
+#include "ivpu_fw_log.h"
 #include "ivpu_gem.h"
 #include "ivpu_jsm_msg.h"
 #include "ivpu_pm.h"
@@ -25,6 +27,46 @@ static int bo_list_show(struct seq_file *s, void *v)
 	return 0;
 }
 
+static int fw_trace_capability_show(struct seq_file *s, void *v)
+{
+	struct drm_info_node *node = (struct drm_info_node *)s->private;
+	struct ivpu_device *vdev = to_ivpu_device(node->minor->dev);
+	u64 trace_hw_component_mask;
+	u32 trace_destination_mask;
+	int ret;
+
+	ret = ivpu_jsm_trace_get_capability(vdev, &trace_destination_mask,
+					    &trace_hw_component_mask);
+	if (!ret) {
+		seq_printf(s,
+			   "trace_destination_mask:  %#18x\n"
+			   "trace_hw_component_mask: %#18llx\n",
+			   trace_destination_mask, trace_hw_component_mask);
+	}
+	return 0;
+}
+
+static int fw_trace_config_show(struct seq_file *s, void *v)
+{
+	struct drm_info_node *node = (struct drm_info_node *)s->private;
+	struct ivpu_device *vdev = to_ivpu_device(node->minor->dev);
+	/**
+	 * WA: VPU_JSM_MSG_TRACE_GET_CONFIG command is not working yet,
+	 * so we use values from vdev->fw instead of calling ivpu_jsm_trace_get_config()
+	 */
+	u32 trace_level = vdev->fw->trace_level;
+	u32 trace_destination_mask = vdev->fw->trace_destination_mask;
+	u64 trace_hw_component_mask = vdev->fw->trace_hw_component_mask;
+
+	seq_printf(s,
+		   "trace_level:             %#18x\n"
+		   "trace_destination_mask:  %#18x\n"
+		   "trace_hw_component_mask: %#18llx\n",
+		   trace_level, trace_destination_mask, trace_hw_component_mask);
+
+	return 0;
+}
+
 static int last_bootmode_show(struct seq_file *s, void *v)
 {
 	struct drm_info_node *node = (struct drm_info_node *)s->private;
@@ -37,9 +79,127 @@ static int last_bootmode_show(struct seq_file *s, void *v)
 
 static const struct drm_info_list vdev_debugfs_list[] = {
 	{"bo_list", bo_list_show, 0},
+	{"fw_trace_capability", fw_trace_capability_show, 0},
+	{"fw_trace_config", fw_trace_config_show, 0},
 	{"last_bootmode", last_bootmode_show, 0},
 };
 
+static int fw_log_show(struct seq_file *s, void *v)
+{
+	struct ivpu_device *vdev = s->private;
+	struct drm_printer p = drm_seq_file_printer(s);
+
+	ivpu_fw_log_print(vdev, true, &p);
+	return 0;
+}
+
+static int fw_log_fops_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, fw_log_show, inode->i_private);
+}
+
+static ssize_t
+fw_log_fops_write(struct file *file, const char __user *user_buf, size_t size, loff_t *pos)
+{
+	struct seq_file *s = file->private_data;
+	struct ivpu_device *vdev = s->private;
+
+	if (!size)
+		return -EINVAL;
+
+	ivpu_fw_log_clear(vdev);
+	return size;
+}
+
+static const struct file_operations fw_log_fops = {
+	.owner = THIS_MODULE,
+	.open = fw_log_fops_open,
+	.write = fw_log_fops_write,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+static ssize_t
+fw_trace_destination_mask_fops_write(struct file *file, const char __user *user_buf,
+				     size_t size, loff_t *pos)
+{
+	struct ivpu_device *vdev = file->private_data;
+	struct ivpu_fw_info *fw = vdev->fw;
+	u32 trace_destination_mask;
+	int ret;
+
+	ret = kstrtou32_from_user(user_buf, size, 0, &trace_destination_mask);
+	if (ret < 0)
+		return ret;
+
+	fw->trace_destination_mask = trace_destination_mask;
+
+	ivpu_jsm_trace_set_config(vdev, fw->trace_level, trace_destination_mask,
+				  fw->trace_hw_component_mask);
+
+	return size;
+}
+
+static const struct file_operations fw_trace_destination_mask_fops = {
+	.owner = THIS_MODULE,
+	.open = simple_open,
+	.write = fw_trace_destination_mask_fops_write,
+};
+
+static ssize_t
+fw_trace_hw_comp_mask_fops_write(struct file *file, const char __user *user_buf,
+				 size_t size, loff_t *pos)
+{
+	struct ivpu_device *vdev = file->private_data;
+	struct ivpu_fw_info *fw = vdev->fw;
+	u64 trace_hw_component_mask;
+	int ret;
+
+	ret = kstrtou64_from_user(user_buf, size, 0, &trace_hw_component_mask);
+	if (ret < 0)
+		return ret;
+
+	fw->trace_hw_component_mask = trace_hw_component_mask;
+
+	ivpu_jsm_trace_set_config(vdev, fw->trace_level, fw->trace_destination_mask,
+				  trace_hw_component_mask);
+
+	return size;
+}
+
+static const struct file_operations fw_trace_hw_comp_mask_fops = {
+	.owner = THIS_MODULE,
+	.open = simple_open,
+	.write = fw_trace_hw_comp_mask_fops_write,
+};
+
+static ssize_t
+fw_trace_level_fops_write(struct file *file, const char __user *user_buf, size_t size, loff_t *pos)
+{
+	struct ivpu_device *vdev = file->private_data;
+	struct ivpu_fw_info *fw = vdev->fw;
+	u32 trace_level;
+	int ret;
+
+	ret = kstrtou32_from_user(user_buf, size, 0, &trace_level);
+	if (ret < 0)
+		return ret;
+
+	fw->trace_level = trace_level;
+
+	ivpu_jsm_trace_set_config(vdev, trace_level, fw->trace_destination_mask,
+				  fw->trace_hw_component_mask);
+
+	return size;
+}
+
+static const struct file_operations fw_trace_level_fops = {
+	.owner = THIS_MODULE,
+	.open = simple_open,
+	.write = fw_trace_level_fops_write,
+};
+
 static ssize_t
 ivpu_reset_engine_fn(struct file *file, const char __user *user_buf, size_t size, loff_t *pos)
 {
@@ -69,6 +229,15 @@ void ivpu_debugfs_init(struct drm_minor *minor)
 	drm_debugfs_create_files(vdev_debugfs_list, ARRAY_SIZE(vdev_debugfs_list),
 				 minor->debugfs_root, minor);
 
+	debugfs_create_file("fw_log", 0644, minor->debugfs_root, vdev,
+			    &fw_log_fops);
+	debugfs_create_file("fw_trace_destination_mask", 0200, minor->debugfs_root, vdev,
+			    &fw_trace_destination_mask_fops);
+	debugfs_create_file("fw_trace_hw_comp_mask", 0200, minor->debugfs_root, vdev,
+			    &fw_trace_hw_comp_mask_fops);
+	debugfs_create_file("fw_trace_level", 0200, minor->debugfs_root, vdev,
+			    &fw_trace_level_fops);
+
 	debugfs_create_file("reset_engine", 0200, minor->debugfs_root, vdev,
 			    &ivpu_reset_engine_fops);
 }

drivers/accel/ivpu/ivpu_fw.c

@@ -11,6 +11,7 @@
 #include "vpu_boot_api.h"
 #include "ivpu_drv.h"
 #include "ivpu_fw.h"
+#include "ivpu_fw_log.h"
 #include "ivpu_gem.h"
 #include "ivpu_hw.h"
 #include "ivpu_ipc.h"
@@ -158,6 +159,10 @@ static int ivpu_fw_parse(struct ivpu_device *vdev)
 	fw->cold_boot_entry_point = fw_hdr->entry_point;
 	fw->entry_point = fw->cold_boot_entry_point;
 
+	fw->trace_level = min_t(u32, ivpu_log_level, IVPU_FW_LOG_FATAL);
+	fw->trace_destination_mask = VPU_TRACE_DESTINATION_VERBOSE_TRACING;
+	fw->trace_hw_component_mask = -1;
+
 	ivpu_dbg(vdev, FW_BOOT, "Size: file %lu image %u runtime %u shavenn %u\n",
 		 fw->file->size, fw->image_size, fw->runtime_size, fw->shave_nn_size);
 	ivpu_dbg(vdev, FW_BOOT, "Address: runtime 0x%llx, load 0x%llx, entry point 0x%llx\n",
@@ -189,6 +194,7 @@ static int ivpu_fw_update_global_range(struct ivpu_device *vdev)
 static int ivpu_fw_mem_init(struct ivpu_device *vdev)
 {
 	struct ivpu_fw_info *fw = vdev->fw;
+	int log_verb_size;
 	int ret;
 
 	ret = ivpu_fw_update_global_range(vdev);
@@ -201,17 +207,45 @@ static int ivpu_fw_mem_init(struct ivpu_device *vdev)
 		return -ENOMEM;
 	}
 
+	fw->mem_log_crit = ivpu_bo_alloc_internal(vdev, 0, IVPU_FW_CRITICAL_BUFFER_SIZE,
+						  DRM_IVPU_BO_CACHED);
+	if (!fw->mem_log_crit) {
+		ivpu_err(vdev, "Failed to allocate critical log buffer\n");
+		ret = -ENOMEM;
+		goto err_free_fw_mem;
+	}
+
+	if (ivpu_log_level <= IVPU_FW_LOG_INFO)
+		log_verb_size = IVPU_FW_VERBOSE_BUFFER_LARGE_SIZE;
+	else
+		log_verb_size = IVPU_FW_VERBOSE_BUFFER_SMALL_SIZE;
+
+	fw->mem_log_verb = ivpu_bo_alloc_internal(vdev, 0, log_verb_size, DRM_IVPU_BO_CACHED);
+	if (!fw->mem_log_verb) {
+		ivpu_err(vdev, "Failed to allocate verbose log buffer\n");
+		ret = -ENOMEM;
+		goto err_free_log_crit;
+	}
+
 	if (fw->shave_nn_size) {
 		fw->mem_shave_nn = ivpu_bo_alloc_internal(vdev, vdev->hw->ranges.global_high.start,
 							  fw->shave_nn_size, DRM_IVPU_BO_UNCACHED);
 		if (!fw->mem_shave_nn) {
 			ivpu_err(vdev, "Failed to allocate shavenn buffer\n");
-			ivpu_bo_free_internal(fw->mem);
-			return -ENOMEM;
+			ret = -ENOMEM;
+			goto err_free_log_verb;
 		}
 	}
 
 	return 0;
+
+err_free_log_verb:
+	ivpu_bo_free_internal(fw->mem_log_verb);
+err_free_log_crit:
+	ivpu_bo_free_internal(fw->mem_log_crit);
+err_free_fw_mem:
+	ivpu_bo_free_internal(fw->mem);
+	return ret;
 }
 
 static void ivpu_fw_mem_fini(struct ivpu_device *vdev)
@@ -223,7 +257,12 @@ static void ivpu_fw_mem_fini(struct ivpu_device *vdev)
 		fw->mem_shave_nn = NULL;
 	}
 
+	ivpu_bo_free_internal(fw->mem_log_verb);
+	ivpu_bo_free_internal(fw->mem_log_crit);
 	ivpu_bo_free_internal(fw->mem);
+
+	fw->mem_log_verb = NULL;
+	fw->mem_log_crit = NULL;
 	fw->mem = NULL;
 }
 
@@ -424,6 +463,15 @@ void ivpu_fw_boot_params_setup(struct ivpu_device *vdev, struct vpu_boot_params
 	boot_params->pn_freq_pll_ratio = vdev->hw->pll.pn_ratio;
 	boot_params->max_freq_pll_ratio = vdev->hw->pll.max_ratio;
 
+	boot_params->default_trace_level = vdev->fw->trace_level;
+	boot_params->tracing_buff_message_format_mask = BIT(VPU_TRACING_FORMAT_STRING);
+	boot_params->trace_destination_mask = vdev->fw->trace_destination_mask;
+	boot_params->trace_hw_component_mask = vdev->fw->trace_hw_component_mask;
+	boot_params->crit_tracing_buff_addr = vdev->fw->mem_log_crit->vpu_addr;
+	boot_params->crit_tracing_buff_size = vdev->fw->mem_log_crit->base.size;
+	boot_params->verbose_tracing_buff_addr = vdev->fw->mem_log_verb->vpu_addr;
+	boot_params->verbose_tracing_buff_size = vdev->fw->mem_log_verb->base.size;
+
 	boot_params->punit_telemetry_sram_base = ivpu_hw_reg_telemetry_offset_get(vdev);
 	boot_params->punit_telemetry_sram_size = ivpu_hw_reg_telemetry_size_get(vdev);
 	boot_params->vpu_telemetry_enable = ivpu_hw_reg_telemetry_enable_get(vdev);

drivers/accel/ivpu/ivpu_fw.h

@@ -23,6 +23,9 @@ struct ivpu_fw_info {
 	u32 shave_nn_size;
 	u64 entry_point; /* Cold or warm boot entry point for next boot */
 	u64 cold_boot_entry_point;
+	u32 trace_level;
+	u32 trace_destination_mask;
+	u64 trace_hw_component_mask;
 };
 
 int ivpu_fw_init(struct ivpu_device *vdev);

drivers/accel/ivpu/ivpu_fw_log.c

@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020-2023 Intel Corporation
+ */
+
+#include <linux/ctype.h>
+#include <linux/highmem.h>
+#include <linux/fs.h>
+#include <linux/slab.h>
+#include <linux/moduleparam.h>
+
+#include "vpu_boot_api.h"
+#include "ivpu_drv.h"
+#include "ivpu_fw.h"
+#include "ivpu_fw_log.h"
+#include "ivpu_gem.h"
+
+#define IVPU_FW_LOG_LINE_LENGTH	  256
+
+unsigned int ivpu_log_level = IVPU_FW_LOG_ERROR;
+module_param(ivpu_log_level, uint, 0444);
+MODULE_PARM_DESC(ivpu_log_level,
+		 "VPU firmware default trace level: debug=" __stringify(IVPU_FW_LOG_DEBUG)
+		 " info=" __stringify(IVPU_FW_LOG_INFO)
+		 " warn=" __stringify(IVPU_FW_LOG_WARN)
+		 " error=" __stringify(IVPU_FW_LOG_ERROR)
+		 " fatal=" __stringify(IVPU_FW_LOG_FATAL));
+
+static int fw_log_ptr(struct ivpu_device *vdev, struct ivpu_bo *bo, u32 *offset,
+		      struct vpu_tracing_buffer_header **log_header)
+{
+	struct vpu_tracing_buffer_header *log;
+
+	if ((*offset + sizeof(*log)) > bo->base.size)
+		return -EINVAL;
+
+	log = bo->kvaddr + *offset;
+
+	if (log->vpu_canary_start != VPU_TRACING_BUFFER_CANARY)
+		return -EINVAL;
+
+	if (log->header_size < sizeof(*log) || log->header_size > 1024) {
+		ivpu_dbg(vdev, FW_BOOT, "Invalid header size 0x%x\n", log->header_size);
+		return -EINVAL;
+	}
+	if ((char *)log + log->size > (char *)bo->kvaddr + bo->base.size) {
+		ivpu_dbg(vdev, FW_BOOT, "Invalid log size 0x%x\n", log->size);
+		return -EINVAL;
+	}
+
+	*log_header = log;
+	*offset += log->size;
+
+	ivpu_dbg(vdev, FW_BOOT,
+		 "FW log name \"%s\", write offset 0x%x size 0x%x, wrap count %d, hdr version %d size %d format %d, alignment %d",
+		 log->name, log->write_index, log->size, log->wrap_count, log->header_version,
+		 log->header_size, log->format, log->alignment);
+
+	return 0;
+}
+
+static void buffer_print(char *buffer, u32 size, struct drm_printer *p)
+{
+	char line[IVPU_FW_LOG_LINE_LENGTH];
+	u32 index = 0;
+
+	if (!size || !buffer)
+		return;
+
+	while (size--) {
+		if (*buffer == '\n' || *buffer == 0) {
+			line[index] = 0;
+			if (index != 0)
+				drm_printf(p, "%s\n", line);
+			index = 0;
+			buffer++;
+			continue;
+		}
+		if (index == IVPU_FW_LOG_LINE_LENGTH - 1) {
+			line[index] = 0;
+			index = 0;
+			drm_printf(p, "%s\n", line);
+		}
+		if (*buffer != '\r' && (isprint(*buffer) || iscntrl(*buffer)))
+			line[index++] = *buffer;
+		buffer++;
+	}
+	line[index] = 0;
+	if (index != 0)
+		drm_printf(p, "%s\n", line);
+}
+
+static void fw_log_print_buffer(struct ivpu_device *vdev, struct vpu_tracing_buffer_header *log,
+				const char *prefix, bool only_new_msgs, struct drm_printer *p)
+{
+	char *log_buffer = (void *)log + log->header_size;
+	u32 log_size = log->size - log->header_size;
+	u32 log_start = log->read_index;
+	u32 log_end = log->write_index;
+
+	if (!(log->write_index || log->wrap_count) ||
+	    (log->write_index == log->read_index && only_new_msgs)) {
+		drm_printf(p, "==== %s \"%s\" log empty ====\n", prefix, log->name);
+		return;
+	}
+
+	drm_printf(p, "==== %s \"%s\" log start ====\n", prefix, log->name);
+	if (log->write_index > log->read_index) {
+		buffer_print(log_buffer + log_start, log_end - log_start, p);
+	} else {
+		buffer_print(log_buffer + log_end, log_size - log_end, p);
+		buffer_print(log_buffer, log_end, p);
+	}
+	drm_printf(p, "\x1b[0m");
+	drm_printf(p, "==== %s \"%s\" log end   ====\n", prefix, log->name);
+}
+
+void ivpu_fw_log_print(struct ivpu_device *vdev, bool only_new_msgs, struct drm_printer *p)
+{
+	struct vpu_tracing_buffer_header *log_header;
+	u32 next = 0;
+
+	while (fw_log_ptr(vdev, vdev->fw->mem_log_crit, &next, &log_header) == 0)
+		fw_log_print_buffer(vdev, log_header, "VPU critical", only_new_msgs, p);
+
+	next = 0;
+	while (fw_log_ptr(vdev, vdev->fw->mem_log_verb, &next, &log_header) == 0)
+		fw_log_print_buffer(vdev, log_header, "VPU verbose", only_new_msgs, p);
+}
+
+void ivpu_fw_log_clear(struct ivpu_device *vdev)
+{
+	struct vpu_tracing_buffer_header *log_header;
+	u32 next = 0;
+
+	while (fw_log_ptr(vdev, vdev->fw->mem_log_crit, &next, &log_header) == 0)
+		log_header->read_index = log_header->write_index;
+
+	next = 0;
+	while (fw_log_ptr(vdev, vdev->fw->mem_log_verb, &next, &log_header) == 0)
+		log_header->read_index = log_header->write_index;
+}

drivers/accel/ivpu/ivpu_fw_log.h

@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2020-2023 Intel Corporation
+ */
+
+#ifndef __IVPU_FW_LOG_H__
+#define __IVPU_FW_LOG_H__
+
+#include <linux/types.h>
+
+#include <drm/drm_print.h>
+
+#include "ivpu_drv.h"
+
+#define IVPU_FW_LOG_DEFAULT 0
+#define IVPU_FW_LOG_DEBUG   1
+#define IVPU_FW_LOG_INFO    2
+#define IVPU_FW_LOG_WARN    3
+#define IVPU_FW_LOG_ERROR   4
+#define IVPU_FW_LOG_FATAL   5
+
+extern unsigned int ivpu_log_level;
+
+#define IVPU_FW_VERBOSE_BUFFER_SMALL_SIZE	SZ_1M
+#define IVPU_FW_VERBOSE_BUFFER_LARGE_SIZE	SZ_8M
+#define IVPU_FW_CRITICAL_BUFFER_SIZE		SZ_512K
+
+void ivpu_fw_log_print(struct ivpu_device *vdev, bool only_new_msgs, struct drm_printer *p);
+void ivpu_fw_log_clear(struct ivpu_device *vdev);
+
+static inline void ivpu_fw_log_dump(struct ivpu_device *vdev)
+{
+	struct drm_printer p = drm_info_printer(vdev->drm.dev);
+
+	ivpu_fw_log_print(vdev, false, &p);
+}
+
+#endif /* __IVPU_FW_LOG_H__ */