TL/MLX5: mcast multi-group support part 1 #1060
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This patch adds support for multiple multicast groups in UCC. Since each group needs its own QP (and AH, address, etc.), it changes the code to use arrays instead of single variables (for example,
comm->mcast.qp_list[]instead ofcomm->mcast.qp). This is the first step in a bigger set of changes that will fully support multiple MCAST groups. In this patch, some references are still hardcoded toqp_list[0], but these will be replaced in Part 2 so that every group can use its own QP.