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drm/xe/migrate: Update emit_pte to cope with a size level than 4k

Matthew Brost requested to merge mbrost/xe-kernel-driver-fix-missing-guc-firmware:fix_migrate_for_ccs into xe

emit_pte assumes the size argument is 4k aligned, this may not be true for the PTEs emitted for CSS as seen by below call stack:

[ 56.734228] xe_migrate_copy:585: size=327680, ccs_start=327680, css_size=1280,4096 [ 56.734250] xe_migrate_copy:643: size=262144 [ 56.734252] emit_pte:404: ptes=64 [ 56.734255] emit_pte:418: chunk=64 [ 56.734257] xe_migrate_copy:650: size=1024 @ CCS emit PTE [ 56.734259] emit_pte:404: ptes=1 [ 56.734261] emit_pte:418: chunk=1 [ 56.734339] xe_migrate_copy:643: size=65536 [ 56.734342] emit_pte:404: ptes=16 [ 56.734344] emit_pte:418: chunk=16 [ 56.734346] xe_migrate_copy:650: size=256 # CCS emit PTE [ 56.734348] emit_pte:404: ptes=1 [ 56.734350] emit_pte:418: chunk=1 [ 56.734352] xe_res_next:174: size=4096, remaining=0

Update emit_pte to handle sizes less than 4k.

Signed-off-by: Matthew Brost matthew.brost@intel.com

Fixes: #183 (closed)

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