drm/i915/migrate: fix offset calculation

Ensure we add the engine base only after we calculate the qword offset
into the PTE window.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Cc: Ramalingam C <ramalingam.c@intel.com>
Reviewed-by: Ramalingam C <ramalingam.c@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211206112539.3149779-2-matthew.auld@intel.com

diff --git a/drivers/gpu/drm/i915/gt/intel_migrate.c b/drivers/gpu/drm/i915/gt/intel_migrate.c
index 0f94ded..64afb9a 100644 (file)
--- a/drivers/gpu/drm/i915/gt/intel_migrate.c
+++ b/drivers/gpu/drm/i915/gt/intel_migrate.c
@@ -279,10 +279,10 @@ static int emit_pte(struct i915_request *rq,
        GEM_BUG_ON(GRAPHICS_VER(rq->engine->i915) < 8);
 
        /* Compute the page directory offset for the target address range */
-       offset += (u64)rq->engine->instance << 32;
        offset >>= 12;
        offset *= sizeof(u64);
        offset += 2 * CHUNK_SZ;
+       offset += (u64)rq->engine->instance << 32;
 
        cs = intel_ring_begin(rq, 6);
        if (IS_ERR(cs))