Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 0a43e117 authored by Mike Marciniszyn's avatar Mike Marciniszyn Committed by Roland Dreier
Browse files

IB/qib: Add receive header queue size module parameters 



The receive header queue sizes need to modified for performance
tuning.  Three module parameters are added to support this.

Signed-off-by: default avatarMike Marciniszyn <mike.marciniszyn@qlogic.com>
Signed-off-by: default avatarRoland Dreier <rolandd@cisco.com>
parent 9d5b243f

drivers/infiniband/hw/qib/qib_iba7322.c

+24 −4
Original line number Diff line number Diff line
@@ -111,6 +111,21 @@ static ushort qib_singleport; 
module_param_named(singleport, qib_singleport, ushort, S_IRUGO);

MODULE_PARM_DESC(singleport, "Use only IB port 1; more per-port buffer space");



/*

 * Receive header queue sizes

 */

static unsigned qib_rcvhdrcnt;

module_param_named(rcvhdrcnt, qib_rcvhdrcnt, uint, S_IRUGO);

MODULE_PARM_DESC(rcvhdrcnt, "receive header count");



static unsigned qib_rcvhdrsize;

module_param_named(rcvhdrsize, qib_rcvhdrsize, uint, S_IRUGO);

MODULE_PARM_DESC(rcvhdrsize, "receive header size in 32-bit words");



static unsigned qib_rcvhdrentsize;

module_param_named(rcvhdrentsize, qib_rcvhdrentsize, uint, S_IRUGO);

MODULE_PARM_DESC(rcvhdrentsize, "receive header entry size in 32-bit words");



#define MAX_ATTEN_LEN 64 /* plenty for any real system */

/* for read back, default index is ~5m copper cable */

static char txselect_list[MAX_ATTEN_LEN] = "10";
@@ -3530,6 +3545,9 @@ static void qib_7322_config_ctxts(struct qib_devdata *dd) 


	/* kr_rcvegrcnt changes based on the number of contexts enabled */

	dd->cspec->rcvegrcnt = qib_read_kreg32(dd, kr_rcvegrcnt);

	if (qib_rcvhdrcnt)

		dd->rcvhdrcnt = max(dd->cspec->rcvegrcnt, qib_rcvhdrcnt);

	else

		dd->rcvhdrcnt = max(dd->cspec->rcvegrcnt,

				    dd->num_pports > 1 ? 1024U : 2048U);

}
@@ -6097,8 +6115,10 @@ static int qib_init_7322_variables(struct qib_devdata *dd) 
		ppd++;

	}



	dd->rcvhdrentsize = QIB_RCVHDR_ENTSIZE;

	dd->rcvhdrsize = QIB_DFLT_RCVHDRSIZE;

	dd->rcvhdrentsize = qib_rcvhdrentsize ?

		qib_rcvhdrentsize : QIB_RCVHDR_ENTSIZE;

	dd->rcvhdrsize = qib_rcvhdrsize ?

		qib_rcvhdrsize : QIB_DFLT_RCVHDRSIZE;

	dd->rhf_offset = dd->rcvhdrentsize - sizeof(u64) / sizeof(u32);



	/* we always allocate at least 2048 bytes for eager buffers */