[src/trunk]: src/sys/dev/pci Make some parametes in ixl(4) be able to change ...

[yamaguchi <yamaguchi%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/c079035e8fd1
branches:  trunk
changeset: 1006301:c079035e8fd1
user:      yamaguchi <yamaguchi%NetBSD.org@localhost>
date:      Thu Jan 09 08:54:05 2020 +0000

description:
Make some parametes in ixl(4) be able to change when loading
for debugging

- nomsix(boolean)
   - disable msix support
- stats_interval(signed integer)
   - change interval for collecting statistic counters
- nqps_limit(signed integer)
   - limitation for the number of queue pairs
- {tx,rx}_ndescs(unsigned integer)
   - the number of discriptors in txqueue or rxqueue

diffstat:

 sys/dev/pci/if_ixl.c |  87 ++++++++++++++++++++++++++++++++++++++++++++++-----
 1 files changed, 78 insertions(+), 9 deletions(-)

diffs (153 lines):

diff -r e0e930628360 -r c079035e8fd1 sys/dev/pci/if_ixl.c
--- a/sys/dev/pci/if_ixl.c      Thu Jan 09 04:04:01 2020 +0000
+++ b/sys/dev/pci/if_ixl.c      Thu Jan 09 08:54:05 2020 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_ixl.c,v 1.18 2020/01/09 02:55:41 yamaguchi Exp $    */
+/*     $NetBSD: if_ixl.c,v 1.19 2020/01/09 08:54:05 yamaguchi Exp $    */
 
 /*
  * Copyright (c) 2013-2015, Intel Corporation
@@ -109,6 +109,8 @@
 #include <dev/pci/if_ixlreg.h>
 #include <dev/pci/if_ixlvar.h>
 
+#include <prop/proplib.h>
+
 struct ixl_softc; /* defined */
 
 #define I40E_PF_RESET_WAIT_COUNT       200
@@ -715,10 +717,18 @@
 #else
 #define DDPRINTF(sc, fmt, args...)     __nothing
 #endif
-#define IXL_NOMSIX     false
 #ifndef IXL_STATS_INTERVAL_MSEC
 #define IXL_STATS_INTERVAL_MSEC        10000
 #endif
+#ifndef IXL_QUEUE_NUM
+#define IXL_QUEUE_NUM          0
+#endif
+
+static bool             ixl_param_nomsix = false;
+static int              ixl_param_stats_interval = IXL_STATS_INTERVAL_MSEC;
+static int              ixl_param_nqps_limit = IXL_QUEUE_NUM;
+static unsigned int     ixl_param_tx_ndescs = 1024;
+static unsigned int     ixl_param_rx_ndescs = 1024;
 
 static enum i40e_mac_type
     ixl_mactype(pci_product_id_t);
@@ -1178,10 +1188,15 @@
                goto shutdown;
        }
 
-       sc->sc_nqueue_pairs = sc->sc_nqueue_pairs_max =
-           MIN((int)sc->sc_nqueue_pairs_device, ncpu);
-       sc->sc_tx_ring_ndescs = 1024;
-       sc->sc_rx_ring_ndescs = 1024;
+       sc->sc_nqueue_pairs_max = MIN((int)sc->sc_nqueue_pairs_device, ncpu);
+       if (ixl_param_nqps_limit > 0) {
+               sc->sc_nqueue_pairs_max = MIN((int)sc->sc_nqueue_pairs_max,
+                   ixl_param_nqps_limit);
+       }
+
+       sc->sc_nqueue_pairs = sc->sc_nqueue_pairs_max;
+       sc->sc_tx_ring_ndescs = ixl_param_tx_ndescs;
+       sc->sc_rx_ring_ndescs = ixl_param_rx_ndescs;
 
        KASSERT(IXL_TXRX_PROCESS_UNLIMIT > sc->sc_rx_ring_ndescs);
        KASSERT(IXL_TXRX_PROCESS_UNLIMIT > sc->sc_tx_ring_ndescs);
@@ -5486,7 +5501,7 @@
        int counts[PCI_INTR_TYPE_SIZE];
        int error;
        unsigned int i;
-       bool retry, nomsix = IXL_NOMSIX;
+       bool retry;
 
        memset(counts, 0, sizeof(counts));
        max_type = PCI_INTR_TYPE_MSIX;
@@ -5494,7 +5509,7 @@
        counts[PCI_INTR_TYPE_MSIX] = sc->sc_nqueue_pairs_max + 1;
        counts[PCI_INTR_TYPE_INTX] = 1;
 
-       if (nomsix)
+       if (ixl_param_nomsix)
                counts[PCI_INTR_TYPE_MSIX] = 0;
 
        do {
@@ -5712,7 +5727,7 @@
        evcnt_attach_dynamic(&isc->isc_vsi_tx_broadcast, EVCNT_TYPE_MISC,
            NULL, device_xname(sc->sc_dev), "Tx broadcast / vsi");
 
-       sc->sc_stats_intval = IXL_STATS_INTERVAL_MSEC;
+       sc->sc_stats_intval = ixl_param_stats_interval;
        callout_init(&sc->sc_stats_callout, CALLOUT_MPSAFE);
        callout_setfunc(&sc->sc_stats_callout, ixl_stats_callout, sc);
        ixl_work_set(&sc->sc_stats_task, ixl_stats_update, sc);
@@ -6354,6 +6369,59 @@
 #include "ioconf.c"
 #endif
 
+#ifdef _MODULE
+static void
+ixl_parse_modprop(prop_dictionary_t dict)
+{
+       prop_object_t obj;
+       int64_t val;
+       uint64_t uval;
+
+       if (dict == NULL)
+               return;
+
+       obj = prop_dictionary_get(dict, "nomsix");
+       if (obj != NULL && prop_object_type(obj) == PROP_TYPE_BOOL) {
+               ixl_param_nomsix = prop_bool_true((prop_bool_t)obj);
+       }
+
+       obj = prop_dictionary_get(dict, "stats_interval");
+       if (obj != NULL && prop_object_type(obj) == PROP_TYPE_NUMBER) {
+               val = prop_number_integer_value((prop_number_t)obj);
+
+               /* the range has no reason */
+               if (100 < val || val < 180000) {
+                       ixl_param_stats_interval = val;
+               }
+       }
+
+       obj = prop_dictionary_get(dict, "nqps_limit");
+       if (obj != NULL && prop_object_type(obj) == PROP_TYPE_NUMBER) {
+               val = prop_number_integer_value((prop_number_t)obj);
+
+               if (val <= INT32_MAX)
+                       ixl_param_nqps_limit = val;
+       }
+
+       obj = prop_dictionary_get(dict, "rx_ndescs");
+       if (obj != NULL && prop_object_type(obj) == PROP_TYPE_NUMBER) {
+               uval = prop_number_unsigned_integer_value((prop_number_t)obj);
+
+               if (uval > 8)
+                       ixl_param_rx_ndescs = uval;
+       }
+
+       obj = prop_dictionary_get(dict, "tx_ndescs");
+       if (obj != NULL && prop_object_type(obj) == PROP_TYPE_NUMBER) {
+               uval = prop_number_unsigned_integer_value((prop_number_t)obj);
+
+               if (uval > IXL_TX_PKT_DESCS)
+                       ixl_param_tx_ndescs = uval;
+       }
+
+}
+#endif
+
 static int
 if_ixl_modcmd(modcmd_t cmd, void *opaque)
 {
@@ -6362,6 +6430,7 @@
 #ifdef _MODULE
        switch (cmd) {
        case MODULE_CMD_INIT:
+               ixl_parse_modprop((prop_dictionary_t)opaque);
                error = config_init_component(cfdriver_ioconf_if_ixl,
                    cfattach_ioconf_if_ixl, cfdata_ioconf_if_ixl);
                break;