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The global doorbell is used for more than just Ethernet resources, so move it out of mlx5e_hw_objs into a common place (mlx5_priv), to avoid non-Ethernet modules (e.g. HWS, ASO) depending on Ethernet structs. Use this opportunity to consolidate it with the 'uar' pointer already there, which was used as an RX doorbell. Underneath the 'uar' pointer is identical to 'bfreg->up', so store a single resource and use that instead. For CQ doorbells, care is taken to always use bfreg->up->index instead of bfreg->index, which may refer to a subsequent UAR page from the same ALLOC_UAR batch on some NICs. This paves the way for cleanly supporting multiple doorbells in the Ethernet driver. Signed-off-by: Cosmin Ratiu <cratiu@nvidia.com> Reviewed-by: Dragos Tatulea <dtatulea@nvidia.com> Signed-off-by: Tariq Toukan <tariqt@nvidia.com> Reviewed-by: Simon Horman <horms@kernel.org> Signed-off-by: Jakub Kicinski <kuba@kernel.org>