/*
* Copyright 2012-15 Advanced Micro Devices, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: AMD
*
*/
#include "dm_services.h"
#include "include/logger_interface.h"
#include "logger.h"
#define NUM_ELEMENTS(a) (sizeof(a) / sizeof((a)[0]))
static const struct dc_log_type_info log_type_info_tbl[] = {
{LOG_ERROR, "Error"},
{LOG_WARNING, "Warning"},
{LOG_DEBUG, "Debug"},
{LOG_DC, "DC_Interface"},
{LOG_SURFACE, "Surface"},
{LOG_HW_HOTPLUG, "HW_Hotplug"},
{LOG_HW_LINK_TRAINING, "HW_LKTN"},
{LOG_HW_SET_MODE, "HW_Mode"},
{LOG_HW_RESUME_S3, "HW_Resume"},
{LOG_HW_AUDIO, "HW_Audio"},
{LOG_HW_HPD_IRQ, "HW_HPDIRQ"},
{LOG_MST, "MST"},
{LOG_SCALER, "Scaler"},
{LOG_BIOS, "BIOS"},
{LOG_BANDWIDTH_CALCS, "BWCalcs"},
{LOG_BANDWIDTH_VALIDATION, "BWValidation"},
{LOG_I2C_AUX, "I2C_AUX"},
{LOG_SYNC, "Sync"},
{LOG_BACKLIGHT, "Backlight"},
{LOG_FEATURE_OVERRIDE, "Override"},
{LOG_DETECTION_EDID_PARSER, "Edid"},
{LOG_DETECTION_DP_CAPS, "DP_Caps"},
{LOG_RESOURCE, "Resource"},
{LOG_DML, "DML"},
{LOG_EVENT_MODE_SET, "Mode"},
{LOG_EVENT_DETECTION, "Detect"},
{LOG_EVENT_LINK_TRAINING, "LKTN"},
{LOG_EVENT_LINK_LOSS, "LinkLoss"},
{LOG_EVENT_UNDERFLOW, "Underflow"},
{LOG_IF_TRACE, "InterfaceTrace"},
{LOG_DTN, "DTN"}
};
/* ----------- Object init and destruction ----------- */
static bool construct(struct dc_context *ctx, struct dal_logger *logger,
uint32_t log_mask)
{
/* malloc buffer and init offsets */
logger->log_buffer_size = DAL_LOGGER_BUFFER_MAX_SIZE;
logger->log_buffer = (char *)kzalloc(logger->log_buffer_size * sizeof(char),
GFP_KERNEL);
if (!logger->log_buffer)
return false;
/* Initialize both offsets to start of buffer (empty) */
logger->buffer_read_offset = 0;
logger->buffer_write_offset = 0;
logger->open_count = 0;
logger->flags.bits.ENABLE_CONSOLE = 1;
logger->flags.bits.ENABLE_BUFFER = 0;
logger->ctx = ctx;
logger->mask = log_mask;
return true;
}
static void destruct(struct dal_logger *logger)
{
if (logger->log_buffer) {
kfree(logger->log_buffer);
logger->log_buffer = NULL;
}
}
struct dal_logger *dal_logger_create(struct dc_context *ctx, uint32_t log_mask)
{
/* malloc struct */
struct dal_logger *logger = kzalloc(sizeof(struct dal_logger),
GFP_KERNEL);
if (!logger)
return NULL;
if (!construct(ctx, logger, log_mask)) {
kfree(logger);
return NULL;
}
return logger;
}
uint32_t dal_logger_destroy(struct dal_logger **logger)
{
if (logger == NULL || *logger == NULL)
return 1;
destruct(*logger);
kfree(*logger);
*logger = NULL;
return 0;
}
/* ------------------------------------------------------------------------ */
static bool dal_logger_should_log(
struct dal_logger *logger,
enum dc_log_type log_type)
{
if (logger->mask & (1 << log_type))
return true;
return false;
}
static void log_to_debug_console(struct log_entry *entry)
{
struct dal_logger *logger = entry->logger;
if (logger->flags.bits.ENABLE_CONSOLE == 0)
return;
if (entry->buf_offset) {
switch (entry->type) {
case LOG_ERROR:
dm_error("%s", entry->buf);
break;
default:
dm_output_to_console("%s", entry->buf);
break;
}
}
}
/* Print everything unread existing in log_buffer to debug console*/
void dm_logger_flush_buffer(struct dal_logger *logger, bool should_warn)
{
char *string_start = &logger->log_buffer[logger->buffer_read_offset];
if (should_warn)
dm_output_to_console(
"---------------- FLUSHING LOG BUFFER ----------------\n");
while (logger->buffer_read_offset < logger->buffer_write_offset) {
if (logger->log_buffer[logger->buffer_read_offset] == '\0') {
dm_output_to_console("%s", string_start);
string_start = logger->log_buffer + logger->buffer_read_offset + 1;
}
logger->buffer_read_offset++;
}
if (should_warn)
dm_output_to_console(
"-------------- END FLUSHING LOG BUFFER --------------\n\n");
}
static void log_to_internal_buffer(struct log_entry *entry)
{
uint32_t size = entry->buf_offset;
struct dal_logger *logger = entry->logger;
if (logger->flags.bits.ENABLE_BUFFER == 0)
return;
if (logger->log_buffer == NULL)
return;
if (size > 0 && size < logger->log_buffer_size) {
int buffer_space = logger->log_buffer_size -
logger->buffer_write_offset;
if (logger->buffer_write_offset == logger->buffer_read_offset) {
/* Buffer is empty, start writing at beginning */
buffer_space = logger->log_buffer_size;
logger->buffer_write_offset = 0;
logger->buffer_read_offset = 0;
}
if (buffer_space > size) {
/* No wrap around, copy 'size' bytes
* from 'entry->buf' to 'log_buffer'
*/
memmove(logger->log_buffer +
logger->buffer_write_offset,
entry->buf, size);
logger->buffer_write_offset += size;
} else {
/* Not enough room remaining, we should flush
* existing logs */
/* Flush existing unread logs to console */
dm_logger_flush_buffer(logger, true);
/* Start writing to beginning of buffer */
memmove(logger->log_buffer, entry->buf, size);
logger->buffer_write_offset = size;
logger->buffer_read_offset = 0;
}
}
}
static void log_heading(struct log_entry *entry)
{
int j;
for (j = 0; j < NUM_ELEMENTS(log_type_info_tbl); j++) {
const struct dc_log_type_info *info = &log_type_info_tbl[j];
if (info->type == entry->type)
dm_logger_append(entry, "[%s]\t", info->name);
}
}
static void append_entry(
struct log_entry *entry,
char *buffer,
uint32_t buf_size)
{
if (!entry->buf ||
entry->buf_offset + buf_size > entry->max_buf_bytes
) {
BREAK_TO_DEBUGGER();
return;
}
/* Todo: check if off by 1 byte due to \0 anywhere */
memmove(entry->buf + entry->buf_offset, buffer, buf_size);
entry->buf_offset += buf_size;
}
/* ------------------------------------------------------------------------ */
/* Warning: Be careful that 'msg' is null terminated and the total size is
* less than DAL_LOGGER_BUFFER_MAX_LOG_LINE_SIZE (256) including '\0'
*/
void dm_logger_write(
struct dal_logger *logger,
enum dc_log_type log_type,
const char *msg,
...)
{
if (logger && dal_logger_should_log(logger, log_type)) {
uint32_t size;
va_list args;
char buffer[LOG_MAX_LINE_SIZE];
struct log_entry entry;
va_start(args, msg);
entry.logger = logger;
entry.buf = buffer;
entry.buf_offset = 0;
entry.max_buf_bytes = DAL_LOGGER_BUFFER_MAX_SIZE * sizeof(char);
entry.type = log_type;
log_heading(&entry);
size = dm_log_to_buffer(
buffer, LOG_MAX_LINE_SIZE - 1, msg, args);
buffer[entry.buf_offset + size] = '\0';
entry.buf_offset += size + 1;
/* --Flush log_entry buffer-- */
/* print to kernel console */
log_to_debug_console(&entry);
/* log internally for dsat */
log_to_internal_buffer(&entry);
va_end(args);
}
}
/* Same as dm_logger_write, except without open() and close(), which must
* be done separately.
*/
void dm_logger_append(
struct log_entry *entry,
const char *msg,
...)
{
struct dal_logger *logger;
if (!entry) {
BREAK_TO_DEBUGGER();
return;
}
logger = entry->logger;
if (logger && logger->open_count > 0 &&
dal_logger_should_log(logger, entry->type)) {
uint32_t size;
va_list args;
char buffer[LOG_MAX_LINE_SIZE];
va_start(args, msg);
size = dm_log_to_buffer(
buffer, LOG_MAX_LINE_SIZE, msg, args);
if (size < LOG_MAX_LINE_SIZE - 1) {
append_entry(entry, buffer, size);
} else {
append_entry(entry, "LOG_ERROR, line too long\n", 27);
}
va_end(args);
}
}
void dm_logger_open(
struct dal_logger *logger,
struct log_entry *entry, /* out */
enum dc_log_type log_type)
{
if (!entry) {
BREAK_TO_DEBUGGER();
return;
}
entry->type = log_type;
entry->logger = logger;
entry->buf = kzalloc(DAL_LOGGER_BUFFER_MAX_SIZE * sizeof(char),
GFP_KERNEL);
entry->buf_offset = 0;
entry->max_buf_bytes = DAL_LOGGER_BUFFER_MAX_SIZE * sizeof(char);
logger->open_count++;
log_heading(entry);
}
void dm_logger_close(struct log_entry *entry)
{
struct dal_logger *logger = entry->logger;
if (logger && logger->open_count > 0) {
logger->open_count--;
} else {
BREAK_TO_DEBUGGER();
goto cleanup;
}
/* --Flush log_entry buffer-- */
/* print to kernel console */
log_to_debug_console(entry);
/* log internally for dsat */
log_to_internal_buffer(entry);
/* TODO: Write end heading */
cleanup:
if (entry->buf) {
kfree(entry->buf);
entry->buf = NULL;
entry->buf_offset = 0;
entry->max_buf_bytes = 0;
}
}