From b29895e18304feb7e8afc6388db7ece60327b23c Mon Sep 17 00:00:00 2001 From: Christian König Date: Fri, 26 Nov 2021 14:12:42 +0100 Subject: dma-buf: add DMA_RESV_USAGE_KERNEL v3 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add an usage for kernel submissions. Waiting for those are mandatory for dynamic DMA-bufs. As a precaution this patch also changes all occurrences where fences are added as part of memory management in TTM, VMWGFX and i915 to use the new value because it now becomes possible for drivers to ignore fences with the WRITE usage. v2: use "must" in documentation, fix whitespaces v3: separate out some driver changes and better document why some changes should still be part of this patch. Signed-off-by: Christian König Reviewed-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20220407085946.744568-5-christian.koenig@amd.com --- drivers/dma-buf/dma-resv.c | 2 +- drivers/dma-buf/st-dma-resv.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'drivers/dma-buf') diff --git a/drivers/dma-buf/dma-resv.c b/drivers/dma-buf/dma-resv.c index 378d47e1cfea..f4860e5f2d8b 100644 --- a/drivers/dma-buf/dma-resv.c +++ b/drivers/dma-buf/dma-resv.c @@ -726,7 +726,7 @@ EXPORT_SYMBOL_GPL(dma_resv_test_signaled); */ void dma_resv_describe(struct dma_resv *obj, struct seq_file *seq) { - static const char *usage[] = { "write", "read" }; + static const char *usage[] = { "kernel", "write", "read" }; struct dma_resv_iter cursor; struct dma_fence *fence; diff --git a/drivers/dma-buf/st-dma-resv.c b/drivers/dma-buf/st-dma-resv.c index d0f7c2bfd4f0..062b57d63fa6 100644 --- a/drivers/dma-buf/st-dma-resv.c +++ b/drivers/dma-buf/st-dma-resv.c @@ -296,7 +296,7 @@ int dma_resv(void) int r; spin_lock_init(&fence_lock); - for (usage = DMA_RESV_USAGE_WRITE; usage <= DMA_RESV_USAGE_READ; + for (usage = DMA_RESV_USAGE_KERNEL; usage <= DMA_RESV_USAGE_READ; ++usage) { r = subtests(tests, (void *)(unsigned long)usage); if (r) -- cgit v1.2.3