/**
* intel_lpe_audio_irq_handler() - forwards the LPE audio irq
* @dev_priv: the i915 drm device private data
*
* the LPE Audio irq is forwarded to the irq handler registered by LPE audio
* driver.
*/
void intel_lpe_audio_irq_handler(struct drm_i915_private *dev_priv)
{
int ret;
if (!HAS_LPE_AUDIO(dev_priv))
return;
ret = generic_handle_irq(dev_priv->lpe_audio.irq);
if (ret)
DRM_ERROR_RATELIMITED("error handling LPE audio irq: %d\n",
ret);
}
static void mdp4_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
{
struct mdp4_kms *mdp4_kms = container_of(irq, struct mdp4_kms, error_handler);
static DEFINE_RATELIMIT_STATE(rs, 5*HZ, 1);
extern bool dumpstate;
DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
if (dumpstate && __ratelimit(&rs)) {
struct drm_printer p = drm_info_printer(mdp4_kms->dev->dev);
drm_state_dump(mdp4_kms->dev, &p);
}
}
static void omap_crtc_error_irq(struct omap_drm_irq *irq, uint32_t irqstatus)
{
struct omap_crtc *omap_crtc =
container_of(irq, struct omap_crtc, error_irq);
if (omap_crtc->ignore_digit_sync_lost) {
irqstatus &= ~DISPC_IRQ_SYNC_LOST_DIGIT;
if (!irqstatus)
return;
}
DRM_ERROR_RATELIMITED("%s: errors: %08x\n", omap_crtc->name, irqstatus);
}
static bool guc_check_log_buf_overflow(struct intel_guc_log *log,
enum guc_log_buffer_type type,
unsigned int full_cnt)
{
unsigned int prev_full_cnt = log->stats[type].sampled_overflow;
bool overflow = false;
if (full_cnt != prev_full_cnt) {
overflow = true;
log->stats[type].overflow = full_cnt;
log->stats[type].sampled_overflow += full_cnt - prev_full_cnt;
if (full_cnt < prev_full_cnt) {
/* buffer_full_cnt is a 4 bit counter */
log->stats[type].sampled_overflow += 16;
}
DRM_ERROR_RATELIMITED("GuC log buffer overflow\n");
}
return overflow;
}
static void guc_read_update_log_buffer(struct intel_guc_log *log)
{
unsigned int buffer_size, read_offset, write_offset, bytes_to_copy, full_cnt;
struct guc_log_buffer_state *log_buf_state, *log_buf_snapshot_state;
struct guc_log_buffer_state log_buf_state_local;
enum guc_log_buffer_type type;
void *src_data, *dst_data;
bool new_overflow;
mutex_lock(&log->relay.lock);
if (WARN_ON(!intel_guc_log_relay_enabled(log)))
goto out_unlock;
/* Get the pointer to shared GuC log buffer */
log_buf_state = src_data = log->relay.buf_addr;
/* Get the pointer to local buffer to store the logs */
log_buf_snapshot_state = dst_data = guc_get_write_buffer(log);
if (unlikely(!log_buf_snapshot_state)) {
/*
* Used rate limited to avoid deluge of messages, logs might be
* getting consumed by User at a slow rate.
*/
DRM_ERROR_RATELIMITED("no sub-buffer to capture logs\n");
log->relay.full_count++;
goto out_unlock;
}
/* Actual logs are present from the 2nd page */
src_data += PAGE_SIZE;
dst_data += PAGE_SIZE;
for (type = GUC_ISR_LOG_BUFFER; type < GUC_MAX_LOG_BUFFER; type++) {
/*
* Make a copy of the state structure, inside GuC log buffer
* (which is uncached mapped), on the stack to avoid reading
* from it multiple times.
*/
memcpy(&log_buf_state_local, log_buf_state,
sizeof(struct guc_log_buffer_state));
buffer_size = guc_get_log_buffer_size(type);
read_offset = log_buf_state_local.read_ptr;
write_offset = log_buf_state_local.sampled_write_ptr;
full_cnt = log_buf_state_local.buffer_full_cnt;
/* Bookkeeping stuff */
log->stats[type].flush += log_buf_state_local.flush_to_file;
new_overflow = guc_check_log_buf_overflow(log, type, full_cnt);
/* Update the state of shared log buffer */
log_buf_state->read_ptr = write_offset;
log_buf_state->flush_to_file = 0;
log_buf_state++;
/* First copy the state structure in snapshot buffer */
memcpy(log_buf_snapshot_state, &log_buf_state_local,
sizeof(struct guc_log_buffer_state));
/*
* The write pointer could have been updated by GuC firmware,
* after sending the flush interrupt to Host, for consistency
* set write pointer value to same value of sampled_write_ptr
* in the snapshot buffer.
*/
log_buf_snapshot_state->write_ptr = write_offset;
log_buf_snapshot_state++;
/* Now copy the actual logs. */
if (unlikely(new_overflow)) {
/* copy the whole buffer in case of overflow */
read_offset = 0;
write_offset = buffer_size;
} else if (unlikely((read_offset > buffer_size) ||
(write_offset > buffer_size))) {
DRM_ERROR("invalid log buffer state\n");
/* copy whole buffer as offsets are unreliable */
read_offset = 0;
write_offset = buffer_size;
}
/* Just copy the newly written data */
if (read_offset > write_offset) {
i915_memcpy_from_wc(dst_data, src_data, write_offset);
bytes_to_copy = buffer_size - read_offset;
} else {
bytes_to_copy = write_offset - read_offset;
}
i915_memcpy_from_wc(dst_data + read_offset,
src_data + read_offset, bytes_to_copy);
src_data += buffer_size;
dst_data += buffer_size;
}
guc_move_to_next_buf(log);
out_unlock:
mutex_unlock(&log->relay.lock);
}
static void mdp4_irq_error_handler(struct mdp_irq *irq, uint32_t irqstatus)
{
DRM_ERROR_RATELIMITED("errors: %08x\n", irqstatus);
}
