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authorJason Gunthorpe <jgg@nvidia.com>2020-10-08 11:27:52 +0300
committerJason Gunthorpe <jgg@nvidia.com>2020-10-16 13:53:46 -0300
commite0477b34d9d11c1a7b1f80bfdbcdc8952ce2adb7 (patch)
tree6c0d2fe7d73edaf004a390af77b6c39d650ac83e /include/rdma/ib_verbs.h
parentlib/scatterlist: Do not limit max_segment to PAGE_ALIGNED values (diff)
downloadlinux-dev-e0477b34d9d11c1a7b1f80bfdbcdc8952ce2adb7.tar.xz
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RDMA: Explicitly pass in the dma_device to ib_register_device
The code in setup_dma_device has become rather convoluted, move all of this to the drivers. Drives now pass in a DMA capable struct device which will be used to setup DMA, or drivers must fully configure the ibdev for DMA and pass in NULL. Other than setting the masks in rvt all drivers were doing this already anyhow. mthca, mlx4 and mlx5 were already setting up maximum DMA segment size for DMA based on their hardweare limits in: __mthca_init_one() dma_set_max_seg_size (1G) __mlx4_init_one() dma_set_max_seg_size (1G) mlx5_pci_init() set_dma_caps() dma_set_max_seg_size (2G) Other non software drivers (except usnic) were extended to UINT_MAX [1, 2] instead of 2G as was before. [1] https://lore.kernel.org/linux-rdma/20200924114940.GE9475@nvidia.com/ [2] https://lore.kernel.org/linux-rdma/20200924114940.GE9475@nvidia.com/ Link: https://lore.kernel.org/r/20201008082752.275846-1-leon@kernel.org Link: https://lore.kernel.org/r/6b2ed339933d066622d5715903870676d8cc523a.1602590106.git.mchehab+huawei@kernel.org Suggested-by: Christoph Hellwig <hch@infradead.org> Signed-off-by: Parav Pandit <parav@nvidia.com> Signed-off-by: Leon Romanovsky <leonro@nvidia.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include/rdma/ib_verbs.h')
-rw-r--r--include/rdma/ib_verbs.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h
index ce935d70fdc8..9bf6c319a670 100644
--- a/include/rdma/ib_verbs.h
+++ b/include/rdma/ib_verbs.h
@@ -2782,7 +2782,8 @@ void ib_dealloc_device(struct ib_device *device);
void ib_get_device_fw_str(struct ib_device *device, char *str);
-int ib_register_device(struct ib_device *device, const char *name);
+int ib_register_device(struct ib_device *device, const char *name,
+ struct device *dma_device);
void ib_unregister_device(struct ib_device *device);
void ib_unregister_driver(enum rdma_driver_id driver_id);
void ib_unregister_device_and_put(struct ib_device *device);