From: "Christian König" <ckoenig.leichtzumerken@gmail.com>
To: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org,
daniel@ffwll.ch
Subject: [PATCH 4/6] drm/amdgpu: add checks if DMA-buf P2P is supported
Date: Mon, 30 Mar 2020 15:55:34 +0200 [thread overview]
Message-ID: <20200330135536.2997-4-christian.koenig@amd.com> (raw)
In-Reply-To: <20200330135536.2997-1-christian.koenig@amd.com>
Check if we can do peer2peer on the PCIe bus.
Signed-off-by: Christian König <christian.koenig@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
index aef12ee2f1e3..bbf67800c8a6 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_dma_buf.c
@@ -38,6 +38,7 @@
#include <drm/amdgpu_drm.h>
#include <linux/dma-buf.h>
#include <linux/dma-fence-array.h>
+#include <linux/pci-p2pdma.h>
/**
* amdgpu_gem_prime_vmap - &dma_buf_ops.vmap implementation
@@ -179,6 +180,9 @@ static int amdgpu_dma_buf_attach(struct dma_buf *dmabuf,
struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev);
int r;
+ if (pci_p2pdma_distance_many(adev->pdev, &attach->dev, 1, true) < 0)
+ attach->peer2peer = false;
+
if (attach->dev->driver == adev->dev->driver)
return 0;
--
2.17.1
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next prev parent reply other threads:[~2020-03-30 13:55 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-30 13:55 [PATCH 1/6] dma-buf: add peer2peer flag Christian König
2020-03-30 13:55 ` [PATCH 2/6] drm/ttm: lock resv object during destruction Christian König
2020-03-30 13:55 ` [PATCH 3/6] drm/amdgpu: note that we can handle peer2peer DMA-buf Christian König
2020-03-30 13:55 ` Christian König [this message]
2020-03-30 13:55 ` [PATCH 5/6] drm/amdgpu: add support for exporting VRAM using DMA-buf v3 Christian König
2020-03-30 13:55 ` [PATCH 6/6] drm/amdgpu: improve amdgpu_gem_info debugfs file Christian König
2020-03-31 8:46 ` [PATCH 1/6] dma-buf: add peer2peer flag Daniel Vetter
2020-04-01 2:39 ` Sumit Semwal
2020-04-01 11:34 ` Daniel Vetter
2020-04-01 16:04 ` Ruhl, Michael J
2020-04-03 8:32 ` Daniel Vetter
-- strict thread matches above, loose matches on Subject: below --
2020-03-11 13:51 P2P for DMA-buf Christian König
2020-03-11 13:51 ` [PATCH 4/6] drm/amdgpu: add checks if DMA-buf P2P is supported Christian König
2020-03-11 14:04 ` Jason Gunthorpe
2020-03-11 14:33 ` Christian König
2020-03-11 14:38 ` Jason Gunthorpe
2020-03-11 14:43 ` Christian König
2020-03-11 14:48 ` Jason Gunthorpe
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