Spec says SW is expected to round up to the nearest 128K, if not already aligned. We are seeing the assert sometimes pop on BMG to tell us that there is a hole between GSM and CCS, as well as popping other asserts with having a vram size with strange alignment, which is likely caused by misaligned offset here.
BSpec: 68023 Fixes: b5c2ca0372dc ("drm/xe/xe2hpg: Determine flat ccs offset for vram") Signed-off-by: Matthew Auld matthew.auld@intel.com Cc: Himal Prasad Ghimiray himal.prasad.ghimiray@intel.com Cc: Akshata Jahagirdar akshata.jahagirdar@intel.com Cc: Shuicheng Lin shuicheng.lin@intel.com Cc: Matt Roper matthew.d.roper@intel.com Cc: stable@vger.kernel.org # v6.10+ --- drivers/gpu/drm/xe/xe_vram.c | 1 + 1 file changed, 1 insertion(+)
diff --git a/drivers/gpu/drm/xe/xe_vram.c b/drivers/gpu/drm/xe/xe_vram.c index 7e765b1499b1..8e65cb4cc477 100644 --- a/drivers/gpu/drm/xe/xe_vram.c +++ b/drivers/gpu/drm/xe/xe_vram.c @@ -181,6 +181,7 @@ static inline u64 get_flat_ccs_offset(struct xe_gt *gt, u64 tile_size)
offset = offset_hi << 32; /* HW view bits 39:32 */ offset |= offset_lo << 6; /* HW view bits 31:6 */ + offset = round_up(offset, SZ_128K); /* SW must round up to nearest 128K */ offset *= num_enabled; /* convert to SW view */
/* We don't expect any holes */