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[src-draft/trunk]: src/sys/dev/pci Adapt to common bpf/radiotap handling in n...



details:   https://anonhg.NetBSD.org/src-all/rev/1c09c6dafcfd
branches:  trunk
changeset: 371580:1c09c6dafcfd
user:      Martin Husemann <martin%NetBSD.org@localhost>
date:      Sun Jun 06 14:44:56 2021 +0200

description:
Adapt to common bpf/radiotap handling in new ieee80211 stack

diffstat:

 sys/dev/pci/if_iwm.c    |  66 +++++++++++-------------------------------------
 sys/dev/pci/if_iwmvar.h |   2 -
 sys/dev/pci/if_iwn.c    |  61 ++++++++------------------------------------
 sys/dev/pci/if_iwnvar.h |   2 -
 4 files changed, 27 insertions(+), 104 deletions(-)

diffs (263 lines):

diff -r 11acfda9a924 -r 1c09c6dafcfd sys/dev/pci/if_iwm.c
--- a/sys/dev/pci/if_iwm.c      Sun Jun 06 14:30:17 2021 +0200
+++ b/sys/dev/pci/if_iwm.c      Sun Jun 06 14:44:56 2021 +0200
@@ -513,7 +513,6 @@
 static void    iwm_init_task(void *);
 static void    iwm_wakeup(struct iwm_softc *);
 #endif
-static void    iwm_radiotap_attach(struct iwm_softc *, struct ifnet *);
 static int     iwm_sysctl_fw_loaded_handler(SYSCTLFN_PROTO);
 
 static int iwm_sysctl_root_num;
@@ -4086,7 +4085,7 @@
        if (le32toh(phy_info->channel) < __arraycount(ic->ic_channels))
                c = &ic->ic_channels[le32toh(phy_info->channel)];
 
-       if (__predict_false(sc->sc_drvbpf != NULL)) {
+       if (__predict_false(ic->ic_flags_ext & IEEE80211_FEXT_BPF)) {
                struct iwm_rx_radiotap_header *tap = &sc->sc_rxtap;
 
                tap->wr_flags = 0;
@@ -4127,8 +4126,6 @@
                        default:  tap->wr_rate =   0;
                        }
                }
-
-               bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m, BPF_D_IN);
        }
 
        ni = ieee80211_find_rxnode(ic, (struct ieee80211_frame_min *)wh);
@@ -4749,7 +4746,6 @@
        struct ieee80211_frame *wh;
        struct ieee80211_key *k = NULL;
        struct mbuf *m1;
-       const struct iwm_rate *rinfo;
        uint32_t flags;
        u_int hdrlen;
        bus_dma_segment_t *seg;
@@ -4779,29 +4775,7 @@
        tx = (void *)cmd->data;
        memset(tx, 0, sizeof(*tx));
 
-       rinfo = iwm_tx_fill_cmd(sc, in, wh, tx);
-
-       if (__predict_false(sc->sc_drvbpf != NULL)) {
-               struct iwm_tx_radiotap_header *tap = &sc->sc_txtap;
-
-               tap->wt_flags = 0;
-               tap->wt_chan_freq = htole16(ni->ni_chan->ic_freq);
-               tap->wt_chan_flags = htole16(ni->ni_chan->ic_flags);
-#ifndef IEEE80211_NO_HT
-               if ((ni->ni_flags & IEEE80211_NODE_HT) &&
-                   !IEEE80211_IS_MULTICAST(wh->i_addr1) &&
-                   type == IEEE80211_FC0_TYPE_DATA &&
-                   rinfo->plcp == IWM_RATE_INVM_PLCP) {
-                       tap->wt_rate = (0x80 | rinfo->ht_plcp);
-               } else
-#endif
-                       tap->wt_rate = rinfo->rate;
-               tap->wt_hwqueue = ac;
-               if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED)
-                       tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP;
-
-               bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m, BPF_D_OUT);
-       }
+       iwm_tx_fill_cmd(sc, in, wh, tx);
 
        /* Encrypt the frame if need be. */
        if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
@@ -8280,6 +8254,19 @@
                panic("%s: could not create workqueue: htprot",
                    device_xname(self));
 #endif
+
+       sc->sc_rxtap_len = sizeof sc->sc_rxtapu;
+       sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len);
+       sc->sc_rxtap.wr_ihdr.it_present = htole32(IWM_RX_RADIOTAP_PRESENT);
+
+       sc->sc_txtap_len = sizeof sc->sc_txtapu;
+       sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len);
+       sc->sc_txtap.wt_ihdr.it_present = htole32(IWM_TX_RADIOTAP_PRESENT);
+
+       /* let the stack know we support radiotap */
+       ic->ic_rh = &sc->sc_rxtapu.th.wr_ihdr;
+       ic->ic_th = &sc->sc_txtapu.th.wt_ihdr;
+
        sc->sc_flags |= IWM_FLAG_STOPPED;
 
        ieee80211_announce(ic);
@@ -8400,13 +8387,6 @@
        ic->ic_opmode = opmode;
        sc->sc_des_esslen = 0;
 
-       /*
-        * XXX is this good enough at attach time?
-        * How doe we handle detach?
-        */
-       if (opmode == IEEE80211_M_MONITOR && ic->ic_montaps > 0) 
-               iwm_radiotap_attach(sc, vap->vap.iv_ifp);
-
        return &vap->vap;
 }
 
@@ -8516,22 +8496,6 @@
 #endif
 }
 
-static void
-iwm_radiotap_attach(struct iwm_softc *sc, struct ifnet *ifp)
-{
-       bpf_attach2(ifp, DLT_IEEE802_11_RADIO,
-           sizeof (struct ieee80211_frame) + IEEE80211_RADIOTAP_HDRLEN,
-           &sc->sc_drvbpf);
-
-       sc->sc_rxtap_len = sizeof sc->sc_rxtapu;
-       sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len);
-       sc->sc_rxtap.wr_ihdr.it_present = htole32(IWM_RX_RADIOTAP_PRESENT);
-
-       sc->sc_txtap_len = sizeof sc->sc_txtapu;
-       sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len);
-       sc->sc_txtap.wt_ihdr.it_present = htole32(IWM_TX_RADIOTAP_PRESENT);
-}
-
 #if 0
 static void
 iwm_init_task(void *arg)
diff -r 11acfda9a924 -r 1c09c6dafcfd sys/dev/pci/if_iwmvar.h
--- a/sys/dev/pci/if_iwmvar.h   Sun Jun 06 14:30:17 2021 +0200
+++ b/sys/dev/pci/if_iwmvar.h   Sun Jun 06 14:44:56 2021 +0200
@@ -503,8 +503,6 @@
 
        struct sysctllog *sc_clog;
 
-       struct bpf_if *sc_drvbpf;
-
        /* XXX */
        kmutex_t        sc_media_mtx __aligned(CACHE_LINE_SIZE);
        /* hardware and softc */
diff -r 11acfda9a924 -r 1c09c6dafcfd sys/dev/pci/if_iwn.c
--- a/sys/dev/pci/if_iwn.c      Sun Jun 06 14:30:17 2021 +0200
+++ b/sys/dev/pci/if_iwn.c      Sun Jun 06 14:44:56 2021 +0200
@@ -214,7 +214,6 @@
 static int     iwn_config_complete(device_t);
 static int     iwn4965_attach(struct iwn_softc *, pci_product_id_t);
 static int     iwn5000_attach(struct iwn_softc *, pci_product_id_t);
-static void    iwn_radiotap_attach(struct iwn_softc *, struct ifnet *);
 static int     iwn_detach(device_t , int);
 #if 0
 static void    iwn_power(int, void *);
@@ -804,8 +803,16 @@
        sc->amrr.amrr_min_success_threshold =  1;
        sc->amrr.amrr_max_success_threshold = 15;
 
-       /* Use common softint-based if_input */
-       /* XXX NetBSD add call to ieee80211_announce for dmesg. */
+       /* Setup radiotap */
+       sc->sc_rxtap_len = sizeof sc->sc_rxtapu;
+       sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len);
+       sc->sc_rxtap.wr_ihdr.it_present = htole32(IWN_RX_RADIOTAP_PRESENT);
+
+       sc->sc_txtap_len = sizeof sc->sc_txtapu;
+       sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len);
+       sc->sc_txtap.wt_ihdr.it_present = htole32(IWN_TX_RADIOTAP_PRESENT);
+       ic->ic_rh = &sc->sc_rxtapu.th.wr_ihdr;
+       ic->ic_th = &sc->sc_txtapu.th.wt_ihdr;
 
        sc->sc_flags |= IWN_FLAG_ATTACHED;
 
@@ -1016,17 +1023,7 @@
        sc->sc_newstate = vap->iv_newstate;
        vap->iv_newstate = iwn_newstate;
 
-#if 0
-       /* Attach the packet filter */
-       bpf_attach2(vap->iv_ifp, DLT_IEEE802_11_RADIO,
-           sizeof(struct ieee80211_frame) + IEEE80211_RADIOTAP_HDRLEN,
-           &sc->sc_drvbpf);
-#endif
-
        ieee80211_init(ifp);
-
-       iwn_radiotap_attach(sc, vap->iv_ifp);
-
        return vap;
 }
 
@@ -1191,25 +1188,6 @@
        return 0;
 }
 
-/*
- * Attach the interface to 802.11 radiotap.
- */
-static void
-iwn_radiotap_attach(struct iwn_softc *sc, struct ifnet *ifp)
-{
-       bpf_attach2(ifp, DLT_IEEE802_11_RADIO,
-           sizeof (struct ieee80211_frame) + IEEE80211_RADIOTAP_HDRLEN,
-           &sc->sc_drvbpf);
-
-       sc->sc_rxtap_len = sizeof sc->sc_rxtapu;
-       sc->sc_rxtap.wr_ihdr.it_len = htole16(sc->sc_rxtap_len);
-       sc->sc_rxtap.wr_ihdr.it_present = htole32(IWN_RX_RADIOTAP_PRESENT);
-
-       sc->sc_txtap_len = sizeof sc->sc_txtapu;
-       sc->sc_txtap.wt_ihdr.it_len = htole16(sc->sc_txtap_len);
-       sc->sc_txtap.wt_ihdr.it_present = htole32(IWN_TX_RADIOTAP_PRESENT);
-}
-
 static int
 iwn_detach(device_t self, int flags __unused)
 {
@@ -2546,7 +2524,8 @@
                iwn_fix_channel(ic, m, stat);
 #endif
 
-       if (sc->sc_drvbpf != NULL) {
+       /* update radiotap data if needed */
+       if (__predict_false(ic->ic_flags_ext & IEEE80211_FEXT_BPF)) {
                struct iwn_rx_radiotap_header *tap = &sc->sc_rxtap;
 
                tap->wr_flags = 0;
@@ -2577,8 +2556,6 @@
                /* Unknown rate: should not happen. */
                default:  tap->wr_rate =   0;
                }
-
-               bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_rxtap_len, m, BPF_D_IN);
        }
 
        /*
@@ -3465,20 +3442,6 @@
 #endif
        rinfo = &iwn_rates[ridx];
 
-       if (sc->sc_drvbpf != NULL) {
-               struct iwn_tx_radiotap_header *tap = &sc->sc_txtap;
-
-               tap->wt_flags = 0;
-               tap->wt_chan_freq = htole16(ni->ni_chan->ic_freq);
-               tap->wt_chan_flags = htole16(ni->ni_chan->ic_flags);
-               tap->wt_rate = rinfo->rate;
-               tap->wt_hwqueue = ac;
-               if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED)
-                       tap->wt_flags |= IEEE80211_RADIOTAP_F_WEP;
-
-               bpf_mtap2(sc->sc_drvbpf, tap, sc->sc_txtap_len, m, BPF_D_OUT);
-       }
-
        /* Encrypt the frame if need be. */
        if (wh->i_fc[1] & IEEE80211_FC1_PROTECTED) {
                k = ieee80211_crypto_encap(ni, m);
diff -r 11acfda9a924 -r 1c09c6dafcfd sys/dev/pci/if_iwnvar.h
--- a/sys/dev/pci/if_iwnvar.h   Sun Jun 06 14:30:17 2021 +0200
+++ b/sys/dev/pci/if_iwnvar.h   Sun Jun 06 14:44:56 2021 +0200
@@ -321,8 +321,6 @@
        int                     sc_tx_timer;
        void                    *powerhook;
 
-       struct bpf_if *         sc_drvbpf;
-
        kmutex_t                sc_media_mtx;   /* XXX */
 
        union {



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