From: Matthew Auld Date: Wed, 22 Oct 2025 16:38:34 +0000 (+0100) Subject: drm/xe/migrate: trim batch buffer sizing X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=0171dcce33fb0c5c26129d8334cd13e511b5522a;p=thirdparty%2Fkernel%2Flinux.git drm/xe/migrate: trim batch buffer sizing We have an extra two dwords, but it looks like we should only need one for the extra bb_end. Likely this is just leftover from back when the arb handling was moved into the ring programming. Signed-off-by: Matthew Auld Cc: Matthew Brost Reviewed-by: Matthew Brost Link: https://lore.kernel.org/r/20251022163836.191405-6-matthew.auld@intel.com --- diff --git a/drivers/gpu/drm/xe/xe_migrate.c b/drivers/gpu/drm/xe/xe_migrate.c index fa87e0eddd09b..95aefe2e71f51 100644 --- a/drivers/gpu/drm/xe/xe_migrate.c +++ b/drivers/gpu/drm/xe/xe_migrate.c @@ -847,7 +847,7 @@ struct dma_fence *xe_migrate_copy(struct xe_migrate *m, &ccs_it); while (size) { - u32 batch_size = 2; /* arb_clear() + MI_BATCH_BUFFER_END */ + u32 batch_size = 1; /* MI_BATCH_BUFFER_END */ struct xe_sched_job *job; struct xe_bb *bb; u32 flush_flags = 0; @@ -1312,7 +1312,7 @@ struct dma_fence *xe_migrate_clear(struct xe_migrate *m, /* Calculate final sizes and batch size.. */ pte_flags = clear_vram ? PTE_UPDATE_FLAG_IS_VRAM : 0; - batch_size = 2 + + batch_size = 1 + pte_update_size(m, pte_flags, src, &src_it, &clear_L0, &clear_L0_ofs, &clear_L0_pt, clear_bo_data ? emit_clear_cmd_len(gt) : 0, 0, @@ -1876,7 +1876,7 @@ static struct dma_fence *xe_migrate_vram(struct xe_migrate *m, struct xe_device *xe = gt_to_xe(gt); bool use_usm_batch = xe->info.has_usm; struct dma_fence *fence = NULL; - u32 batch_size = 2; + u32 batch_size = 1; u64 src_L0_ofs, dst_L0_ofs; struct xe_sched_job *job; struct xe_bb *bb;