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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: 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>
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@ -606,8 +606,8 @@ struct efa_admin_feature_queue_attr_desc {
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/* Number of sub-CQs to be created for each CQ */
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u16 sub_cqs_per_cq;
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/* MBZ */
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u16 reserved;
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/* Minimum number of WQEs per SQ */
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u16 min_sq_depth;
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/* Maximum number of SGEs (buffers) allowed for a single send WQE */
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u16 max_wr_send_sges;
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@ -481,6 +481,7 @@ int efa_com_get_device_attr(struct efa_com_dev *edev,
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result->sub_cqs_per_cq = resp.u.queue_attr.sub_cqs_per_cq;
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result->max_wr_rdma_sge = resp.u.queue_attr.max_wr_rdma_sges;
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result->max_tx_batch = resp.u.queue_attr.max_tx_batch;
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result->min_sq_depth = resp.u.queue_attr.min_sq_depth;
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err = efa_com_get_feature(edev, &resp, EFA_ADMIN_NETWORK_ATTR);
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if (err) {
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@ -128,6 +128,7 @@ struct efa_com_get_device_attr_result {
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u16 max_rq_sge;
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u16 max_wr_rdma_sge;
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u16 max_tx_batch;
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u16 min_sq_depth;
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u8 db_bar;
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};
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@ -1526,6 +1526,7 @@ int efa_alloc_ucontext(struct ib_ucontext *ibucontext, struct ib_udata *udata)
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resp.inline_buf_size = dev->dev_attr.inline_buf_size;
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resp.max_llq_size = dev->dev_attr.max_llq_size;
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resp.max_tx_batch = dev->dev_attr.max_tx_batch;
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resp.min_sq_wr = dev->dev_attr.min_sq_depth;
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if (udata && udata->outlen) {
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err = ib_copy_to_udata(udata, &resp,
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@ -32,7 +32,8 @@ struct efa_ibv_alloc_ucontext_resp {
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__u16 inline_buf_size;
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__u32 max_llq_size; /* bytes */
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__u16 max_tx_batch; /* units of 64 bytes */
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__u8 reserved_90[6];
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__u16 min_sq_wr;
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__u8 reserved_a0[4];
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};
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struct efa_ibv_alloc_pd_resp {
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