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authorMike Marciniszyn <mike.marciniszyn@qlogic.com>2011-01-10 17:42:19 -0800
committerRoland Dreier <rolandd@cisco.com>2011-01-10 17:42:19 -0800
commit0a43e117221702b08a023d6aa1a31ac30e40866b (patch)
treee5977969e7035117ec6c19fac4adfcf69a2ff675 /drivers/infiniband
parent9d5b243f24212966d6d06058f96b2b1a22482f59 (diff)
downloadop-kernel-dev-0a43e117221702b08a023d6aa1a31ac30e40866b.zip
op-kernel-dev-0a43e117221702b08a023d6aa1a31ac30e40866b.tar.gz
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: Mike Marciniszyn <mike.marciniszyn@qlogic.com> Signed-off-by: Roland Dreier <rolandd@cisco.com>
Diffstat (limited to 'drivers/infiniband')
-rw-r--r--drivers/infiniband/hw/qib/qib_iba7322.c28
1 files changed, 24 insertions, 4 deletions
diff --git a/drivers/infiniband/hw/qib/qib_iba7322.c b/drivers/infiniband/hw/qib/qib_iba7322.c
index 9031cd8..b35676f 100644
--- a/drivers/infiniband/hw/qib/qib_iba7322.c
+++ b/drivers/infiniband/hw/qib/qib_iba7322.c
@@ -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";
@@ -3530,8 +3545,11 @@ 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);
- dd->rcvhdrcnt = max(dd->cspec->rcvegrcnt,
- dd->num_pports > 1 ? 1024U : 2048U);
+ if (qib_rcvhdrcnt)
+ dd->rcvhdrcnt = max(dd->cspec->rcvegrcnt, qib_rcvhdrcnt);
+ else
+ dd->rcvhdrcnt = max(dd->cspec->rcvegrcnt,
+ dd->num_pports > 1 ? 1024U : 2048U);
}
static int qib_7322_get_ib_cfg(struct qib_pportdata *ppd, int which)
@@ -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 */
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