[src/trunk]: src/sys/dev/pci make self-describing function the code reading s...

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

details:   https://anonhg.NetBSD.org/src/rev/3de6fd4a691d
branches:  trunk
changeset: 352286:3de6fd4a691d
user:      knakahara <knakahara%NetBSD.org@localhost>
date:      Fri Mar 24 10:01:55 2017 +0000

description:
make self-describing function the code reading sc->sc_nintrs or sc->sc_nqueues directly.

diffstat:

 sys/dev/pci/if_wm.c |  42 +++++++++++++++++++++++++++++-------------
 1 files changed, 29 insertions(+), 13 deletions(-)

diffs (136 lines):

diff -r 73355b050e35 -r 3de6fd4a691d sys/dev/pci/if_wm.c
--- a/sys/dev/pci/if_wm.c       Fri Mar 24 09:59:05 2017 +0000
+++ b/sys/dev/pci/if_wm.c       Fri Mar 24 10:01:55 2017 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: if_wm.c,v 1.501 2017/03/24 09:59:05 knakahara Exp $    */
+/*     $NetBSD: if_wm.c,v 1.502 2017/03/24 10:01:55 knakahara Exp $    */
 
 /*
  * Copyright (c) 2001, 2002, 2003, 2004 Wasabi Systems, Inc.
@@ -84,7 +84,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.501 2017/03/24 09:59:05 knakahara Exp $");
+__KERNEL_RCSID(0, "$NetBSD: if_wm.c,v 1.502 2017/03/24 10:01:55 knakahara Exp $");
 
 #ifdef _KERNEL_OPT
 #include "opt_net_mpsafe.h"
@@ -675,6 +675,8 @@
 static void    wm_rss_getkey(uint8_t *);
 static void    wm_init_rss(struct wm_softc *);
 static void    wm_adjust_qnum(struct wm_softc *, int);
+static inline bool     wm_is_using_msix(struct wm_softc *);
+static inline bool     wm_is_using_multiqueue(struct wm_softc *);
 static int     wm_softint_establish(struct wm_softc *, int, int);
 static int     wm_setup_legacy(struct wm_softc *);
 static int     wm_setup_msix(struct wm_softc *);
@@ -2559,11 +2561,11 @@
        ifp->if_ioctl = wm_ioctl;
        if ((sc->sc_flags & WM_F_NEWQUEUE) != 0) {
                ifp->if_start = wm_nq_start;
-               if (sc->sc_nqueues > 1)
+               if (wm_is_using_multiqueue(sc))
                        ifp->if_transmit = wm_nq_transmit;
        } else {
                ifp->if_start = wm_start;
-               if (sc->sc_nqueues > 1)
+               if (wm_is_using_multiqueue(sc))
                        ifp->if_transmit = wm_transmit;
        }
        ifp->if_watchdog = wm_watchdog;
@@ -4042,7 +4044,7 @@
 
        /* Clear interrupt */
        CSR_WRITE(sc, WMREG_IMC, 0xffffffffU);
-       if (sc->sc_nintrs > 1) {
+       if (wm_is_using_msix(sc)) {
                if (sc->sc_type != WM_T_82574) {
                        CSR_WRITE(sc, WMREG_EIMC, 0xffffffffU);
                        CSR_WRITE(sc, WMREG_EIAC, 0);
@@ -4289,7 +4291,7 @@
        /* Clear any pending interrupt events. */
        CSR_WRITE(sc, WMREG_IMC, 0xffffffffU);
        reg = CSR_READ(sc, WMREG_ICR);
-       if (sc->sc_nintrs > 1) {
+       if (wm_is_using_msix(sc)) {
                if (sc->sc_type != WM_T_82574) {
                        CSR_WRITE(sc, WMREG_EIMC, 0xffffffffU);
                        CSR_WRITE(sc, WMREG_EIAC, 0);
@@ -4587,6 +4589,20 @@
                sc->sc_nqueues = ncpu;
 }
 
+static inline bool
+wm_is_using_msix(struct wm_softc *sc)
+{
+
+       return (sc->sc_nintrs > 1);
+}
+
+static inline bool
+wm_is_using_multiqueue(struct wm_softc *sc)
+{
+
+       return (sc->sc_nqueues > 1);
+}
+
 static int
 wm_softint_establish(struct wm_softc *sc, int qidx, int intr_idx)
 {
@@ -4844,7 +4860,7 @@
                        eitr |= EITR_CNT_INGR;
 
                CSR_WRITE(sc, WMREG_EITR(wmq->wmq_intr_idx), eitr);
-       } else if (sc->sc_type == WM_T_82574 && sc->sc_nintrs > 1) {
+       } else if (sc->sc_type == WM_T_82574 && wm_is_using_msix(sc)) {
                /*
                 * 82574 has both ITR and EITR. SET EITR when we use
                 * the multi queue function with MSI-X.
@@ -5136,8 +5152,8 @@
                reg |= RXCSUM_IPV6OFL | RXCSUM_TUOFL;
        CSR_WRITE(sc, WMREG_RXCSUM, reg);
 
-       /* Set up MSI-X */
-       if (sc->sc_nintrs > 1) {
+       /* Set registers about MSI-X */
+       if (wm_is_using_msix(sc)) {
                uint32_t ivar;
                struct wm_queue *wmq;
                int qid, qintr_idx;
@@ -5250,7 +5266,7 @@
                        CSR_WRITE(sc, WMREG_IVAR_MISC, ivar);
                }
 
-               if (sc->sc_nqueues > 1) {
+               if (wm_is_using_multiqueue(sc)) {
                        wm_init_rss(sc);
 
                        /*
@@ -5269,7 +5285,7 @@
        CSR_WRITE(sc, WMREG_IMC, 0xffffffffU);
        sc->sc_icr = ICR_TXDW | ICR_LSC | ICR_RXSEQ | ICR_RXDMT0 |
            ICR_RXO | ICR_RXT0;
-       if (sc->sc_nintrs > 1) {
+       if (wm_is_using_msix(sc)) {
                uint32_t mask;
                struct wm_queue *wmq;
 
@@ -5537,7 +5553,7 @@
         */
        CSR_WRITE(sc, WMREG_IMC, 0xffffffffU);
        sc->sc_icr = 0;
-       if (sc->sc_nintrs > 1) {
+       if (wm_is_using_msix(sc)) {
                if (sc->sc_type != WM_T_82574) {
                        CSR_WRITE(sc, WMREG_EIMC, 0xffffffffU);
                        CSR_WRITE(sc, WMREG_EIAC, 0);
@@ -6379,7 +6395,7 @@
                 * polling mode is less than default value.
                 * More tuning and AIM are required.
                 */
-               if (sc->sc_nqueues > 1)
+               if (wm_is_using_multiqueue(sc))
                        wmq->wmq_itr = 50;
                else
                        wmq->wmq_itr = sc->sc_itr_init;