[Intel-gfx] [PATCH v2 2/5] drm/i915/guc: Add unaligned wc memcpy for copying GuC Log

[Alan Previn]

Add usage of unaligned wc mempy in read_update_log_buffer
as newer formats of GuC debug-log-events are no longer
guaranteed to be exactly 4-dwords long per event.

Signed-off-by: Alan Previn <alan.previn.teres.alexis at intel.com>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit at intel.com>
---
 drivers/gpu/drm/i915/gt/uc/intel_guc_log.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c
index c5a7aecd08ac..2fa952916120 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_log.c
@@ -459,13 +459,16 @@ static void _guc_log_copy_debuglogs_for_relay(struct intel_guc_log *log)
 
 		/* Just copy the newly written data */
 		if (read_offset > write_offset) {
-			i915_memcpy_from_wc(dst_data, src_data, write_offset);
+			if (!i915_memcpy_from_wc(dst_data, src_data, write_offset))
+				i915_unaligned_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);
+		if (!i915_memcpy_from_wc(dst_data + read_offset,
+					 src_data + read_offset, bytes_to_copy))
+			i915_unaligned_memcpy_from_wc(dst_data + read_offset,
+						      src_data + read_offset, bytes_to_copy);
 
 		src_data += buffer_size;
 		dst_data += buffer_size;
-- 
2.34.1