diff options
| author | Zack Rusin <zackr@vmware.com> | 2021-12-06 20:26:19 +0300 |
|---|---|---|
| committer | Zack Rusin <zackr@vmware.com> | 2021-12-09 21:16:34 +0300 |
| commit | 9ca476acd5e8725706c6ef3b0d94d3005836ffdc (patch) | |
| tree | 05364cba1f94396ecd4992ff5a91cfbba0a826d0 /drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | |
| parent | bf625870b8309b4af75f9c19d287d0c9230634d3 (diff) | |
| download | linux-9ca476acd5e8725706c6ef3b0d94d3005836ffdc.tar.xz | |
drm/vmwgfx: Remove usage of MOBFMT_RANGE
Using MOBFMT_RANGE in the early days of guest backed objects was a major
performance win but that has changed a lot since. There's no more
a performance reason to use MOBFMT_RANGE. The device can/will still
profit from the pages being contiguous but marking them as MOBFMT_RANGE
no longer matters.
Benchmarks (e.g. heaven, valley) show that creating page tables
for mob memory is actually faster than using mobfmt ranges.
Signed-off-by: Zack Rusin <zackr@vmware.com>
Reviewed-by: Martin Krastev <krastevm@vmware.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20211206172620.3139754-12-zack@kde.org
Diffstat (limited to 'drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c')
| -rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c | 12 |
1 files changed, 0 insertions, 12 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c index 20f752ff6168..b84ecc6d6611 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_ttm_buffer.c @@ -288,8 +288,6 @@ static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt) { struct vmw_private *dev_priv = vmw_tt->dev_priv; struct vmw_sg_table *vsgt = &vmw_tt->vsgt; - struct vmw_piter iter; - dma_addr_t old; int ret = 0; if (vmw_tt->mapped) @@ -321,16 +319,6 @@ static int vmw_ttm_map_dma(struct vmw_ttm_tt *vmw_tt) break; } - old = ~((dma_addr_t) 0); - vmw_tt->vsgt.num_regions = 0; - for (vmw_piter_start(&iter, vsgt, 0); vmw_piter_next(&iter);) { - dma_addr_t cur = vmw_piter_dma_addr(&iter); - - if (cur != old + PAGE_SIZE) - vmw_tt->vsgt.num_regions++; - old = cur; - } - vmw_tt->mapped = true; return 0; |