Commit da2924bd authored by Gal Pressman's avatar Gal Pressman Committed by Jason Gunthorpe
Browse files

RDMA/efa: Expose minimum SQ size 

The device reports the minimum SQ size required for creation.

This patch queries the min SQ size and reports it back to the userspace
library.

Link: https://lore.kernel.org/r/20200722140312.3651-3-galpress@amazon.com


Reviewed-by: default avatarFiras JahJah <firasj@amazon.com>
Reviewed-by: default avatarShadi Ammouri <sammouri@amazon.com>
Signed-off-by: default avatarGal Pressman <galpress@amazon.com>
Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
parent 556c811f

drivers/infiniband/hw/efa/efa_admin_cmds_defs.h

+2 −2
Original line number Diff line number Diff line
@@ -606,8 +606,8 @@ struct efa_admin_feature_queue_attr_desc { 
	/* Number of sub-CQs to be created for each CQ */

	u16 sub_cqs_per_cq;



	/* MBZ */

	u16 reserved;

	/* Minimum number of WQEs per SQ */

	u16 min_sq_depth;



	/* Maximum number of SGEs (buffers) allowed for a single send WQE */

	u16 max_wr_send_sges;

drivers/infiniband/hw/efa/efa_com_cmd.c

+1 −0
Original line number Diff line number Diff line
@@ -481,6 +481,7 @@ int efa_com_get_device_attr(struct efa_com_dev *edev, 
	result->sub_cqs_per_cq = resp.u.queue_attr.sub_cqs_per_cq;

	result->max_wr_rdma_sge = resp.u.queue_attr.max_wr_rdma_sges;

	result->max_tx_batch = resp.u.queue_attr.max_tx_batch;

	result->min_sq_depth = resp.u.queue_attr.min_sq_depth;



	err = efa_com_get_feature(edev, &resp, EFA_ADMIN_NETWORK_ATTR);

	if (err) {

drivers/infiniband/hw/efa/efa_com_cmd.h

+1 −0
Original line number Diff line number Diff line
@@ -128,6 +128,7 @@ struct efa_com_get_device_attr_result { 
	u16 max_rq_sge;

	u16 max_wr_rdma_sge;

	u16 max_tx_batch;

	u16 min_sq_depth;

	u8 db_bar;

};

drivers/infiniband/hw/efa/efa_verbs.c

+1 −0
Original line number Diff line number Diff line
@@ -1526,6 +1526,7 @@ int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata) 
	resp.inline_buf_size = dev->dev_attr.inline_buf_size;

	resp.max_llq_size = dev->dev_attr.max_llq_size;

	resp.max_tx_batch = dev->dev_attr.max_tx_batch;

	resp.min_sq_wr = dev->dev_attr.min_sq_depth;



	if (udata && udata->outlen) {

		err = ib_copy_to_udata(udata, &resp,

include/uapi/rdma/efa-abi.h

+2 −1
Original line number Diff line number Diff line
@@ -32,7 +32,8 @@ struct efa_ibv_alloc_ucontext_resp { 
	__u16 inline_buf_size;

	__u32 max_llq_size; /* bytes */

	__u16 max_tx_batch; /* units of 64 bytes */

	__u8 reserved_90[6];

	__u16 min_sq_wr;

	__u8 reserved_a0[4];

};



struct efa_ibv_alloc_pd_resp {

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