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RDMA/efa: Expose minimum SQ size

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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: Firas JahJah <firasj@amazon.com>
Reviewed-by: Shadi Ammouri <sammouri@amazon.com>
Signed-off-by: Gal Pressman <galpress@amazon.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Gal Pressman 2020-07-22 17:03:10 +03:00 committed by Jason Gunthorpe
parent 556c811f24
commit da2924bdca
5 changed files with 7 additions and 3 deletions
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4
drivers/infiniband/hw/efa/efa_admin_cmds_defs.h
View file

@ -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;

1
drivers/infiniband/hw/efa/efa_com_cmd.c
View file

@ -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) {

1
drivers/infiniband/hw/efa/efa_com_cmd.h
View file

@ -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;
};

1
drivers/infiniband/hw/efa/efa_verbs.c
View file

@ -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,

3
include/uapi/rdma/efa-abi.h
View file

@ -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 {