drm/xe: Allocate PF queue size on pow2 boundary

CIRC_SPACE does not work unless the size argument is a power of 2,
allocate PF queue size on power of 2 boundary.

Cc: [email protected]
Fixes: 3338e4f ("drm/xe: Use topology to determine page fault queue size")
Fixes: 29582e0 ("drm/xe: Add page queue multiplier")
Signed-off-by: Matthew Brost <[email protected]>
Reviewed-by: Francois Dugast <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
(cherry picked from commit 491b978)
Signed-off-by: Lucas De Marchi <[email protected]>

Author: mbrost05

drivers/gpu/drm/xe/xe_gt_pagefault.c

@@ -444,6 +444,7 @@ static int xe_alloc_pf_queue(struct xe_gt *gt, struct pf_queue *pf_queue)
 #define PF_MULTIPLIER	8
 	pf_queue->num_dw =
 		(num_eus + XE_NUM_HW_ENGINES) * PF_MSG_LEN_DW * PF_MULTIPLIER;
+	pf_queue->num_dw = roundup_pow_of_two(pf_queue->num_dw);
 #undef PF_MULTIPLIER
 
 	pf_queue->gt = gt;