Commit a03d9f94 authored by Steve Wise's avatar Steve Wise Committed by Roland Dreier
Browse files

RDMA/cxgb4: Max fastreg depth depends on DSGL support 



The max depth of a fastreg mr depends on whether the device supports
DSGL or not.  So compute it dynamically based on the device support
and the module use_dsgl option.

Signed-off-by: default avatarSteve Wise <swise@opengridcomputing.com>
Signed-off-by: default avatarRoland Dreier <roland@purestorage.com>
parent b4e2901c

drivers/infiniband/hw/cxgb4/provider.c

+1 −1
Original line number Diff line number Diff line
@@ -328,7 +328,7 @@ static int c4iw_query_device(struct ib_device *ibdev, 
	props->max_mr = c4iw_num_stags(&dev->rdev);

	props->max_pd = T4_MAX_NUM_PD;

	props->local_ca_ack_delay = 0;

	props->max_fast_reg_page_list_len = T4_MAX_FR_DEPTH;

	props->max_fast_reg_page_list_len = t4_max_fr_depth(use_dsgl);



	return 0;

}

drivers/infiniband/hw/cxgb4/qp.c

+2 −1
Original line number Diff line number Diff line
@@ -566,7 +566,8 @@ static int build_fastreg(struct t4_sq *sq, union t4_wr *wqe, 
	int pbllen = roundup(wr->wr.fast_reg.page_list_len * sizeof(u64), 32);

	int rem;



	if (wr->wr.fast_reg.page_list_len > T4_MAX_FR_DEPTH)

	if (wr->wr.fast_reg.page_list_len >

	    t4_max_fr_depth(use_dsgl))

		return -EINVAL;



	wqe->fr.qpbinde_to_dcacpu = 0;

drivers/infiniband/hw/cxgb4/t4.h

+8 −1
Original line number Diff line number Diff line
@@ -84,7 +84,14 @@ struct t4_status_page { 
			sizeof(struct fw_ri_isgl)) / sizeof(struct fw_ri_sge))

#define T4_MAX_FR_IMMD ((T4_SQ_NUM_BYTES - sizeof(struct fw_ri_fr_nsmr_wr) - \

			sizeof(struct fw_ri_immd)) & ~31UL)

#define T4_MAX_FR_DEPTH (1024 / sizeof(u64))

#define T4_MAX_FR_IMMD_DEPTH (T4_MAX_FR_IMMD / sizeof(u64))

#define T4_MAX_FR_DSGL 1024

#define T4_MAX_FR_DSGL_DEPTH (T4_MAX_FR_DSGL / sizeof(u64))



static inline int t4_max_fr_depth(int use_dsgl)

{

	return use_dsgl ? T4_MAX_FR_DSGL_DEPTH : T4_MAX_FR_IMMD_DEPTH;

}



#define T4_RQ_NUM_SLOTS 2

#define T4_RQ_NUM_BYTES (T4_EQ_ENTRY_SIZE * T4_RQ_NUM_SLOTS)

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