From eb7f84e379daad69b4c92538baeaf93bbf493c14 Mon Sep 17 00:00:00 2001 From: Michal Kalderon Date: Tue, 7 Jul 2020 09:31:00 +0300 Subject: RDMA/qedr: Add EDPM max size to alloc ucontext response User space should receive the maximum edpm size from kernel driver, similar to other edpm/ldpm related limits. Add an additional parameter to the alloc_ucontext_resp structure for the edpm maximum size. In addition, pass an indication from user-space to kernel (and not just kernel to user) that the DPM sizes are supported. This is for supporting backward-forward compatibility between driver and lib for everything related to DPM transaction and limit sizes. This should have been part of commit mentioned in Fixes tag. Link: https://lore.kernel.org/r/20200707063100.3811-3-michal.kalderon@marvell.com Fixes: 93a3d05f9d68 ("RDMA/qedr: Add kernel capability flags for dpm enabled mode") Signed-off-by: Ariel Elior Signed-off-by: Michal Kalderon Signed-off-by: Jason Gunthorpe --- include/uapi/rdma/qedr-abi.h | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/uapi/rdma/qedr-abi.h b/include/uapi/rdma/qedr-abi.h index b261c9fca07b..bf7333b2b5d7 100644 --- a/include/uapi/rdma/qedr-abi.h +++ b/include/uapi/rdma/qedr-abi.h @@ -40,7 +40,8 @@ /* user kernel communication data structures. */ enum qedr_alloc_ucontext_flags { QEDR_ALLOC_UCTX_EDPM_MODE = 1 << 0, - QEDR_ALLOC_UCTX_DB_REC = 1 << 1 + QEDR_ALLOC_UCTX_DB_REC = 1 << 1, + QEDR_SUPPORT_DPM_SIZES = 1 << 2, }; struct qedr_alloc_ucontext_req { @@ -50,6 +51,7 @@ struct qedr_alloc_ucontext_req { #define QEDR_LDPM_MAX_SIZE (8192) #define QEDR_EDPM_TRANS_SIZE (64) +#define QEDR_EDPM_MAX_SIZE (ROCE_REQ_MAX_INLINE_DATA_SIZE) enum qedr_rdma_dpm_type { QEDR_DPM_TYPE_NONE = 0, @@ -77,6 +79,8 @@ struct qedr_alloc_ucontext_resp { __u16 ldpm_limit_size; __u8 edpm_trans_size; __u8 reserved; + __u16 edpm_limit_size; + __u8 padding[6]; }; struct qedr_alloc_pd_ureq { -- cgit v1.2.3