1 /* $OpenBSD: if_rtwn.c,v 1.6 2015/08/28 00:03:53 deraadt Exp $ */
4 * Copyright (c) 2010 Damien Bergamini <damien.bergamini@free.fr>
5 * Copyright (c) 2015 Stefan Sperling <stsp@openbsd.org>
6 * Copyright (c) 2016 Andriy Voskoboinyk <avos@FreeBSD.org>
8 * Permission to use, copy, modify, and distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
21 #include <sys/cdefs.h>
22 __FBSDID("$FreeBSD$");
26 #include <sys/param.h>
28 #include <sys/mutex.h>
30 #include <sys/kernel.h>
31 #include <sys/socket.h>
32 #include <sys/systm.h>
33 #include <sys/malloc.h>
34 #include <sys/queue.h>
35 #include <sys/taskqueue.h>
37 #include <sys/endian.h>
39 #include <machine/bus.h>
40 #include <machine/resource.h>
44 #include <net/if_var.h>
45 #include <net/ethernet.h>
46 #include <net/if_media.h>
48 #include <net80211/ieee80211_var.h>
49 #include <net80211/ieee80211_radiotap.h>
51 #include <dev/rtwn/if_rtwnreg.h>
52 #include <dev/rtwn/if_rtwnvar.h>
53 #include <dev/rtwn/if_rtwn_debug.h>
55 #include <dev/rtwn/pci/rtwn_pci_var.h>
56 #include <dev/rtwn/pci/rtwn_pci_tx.h>
58 #include <dev/rtwn/rtl8192c/pci/r92ce_reg.h>
62 rtwn_mbuf_defrag(struct mbuf *m0, int how)
64 struct mbuf *m = NULL;
66 KASSERT(m0->m_flags & M_PKTHDR,
67 ("M_PKTHDR flag is absent (m %p)!", m0));
69 /* NB: we need _exactly_ one mbuf (no less, no more). */
70 if (m0->m_pkthdr.len > MJUMPAGESIZE) {
73 } else if (m0->m_pkthdr.len > MCLBYTES) {
74 m = m_getjcl(how, MT_DATA, M_PKTHDR, MJUMPAGESIZE);
78 if (m_dup_pkthdr(m, m0, how) == 0) {
83 m_copydata(m0, 0, m0->m_pkthdr.len, mtod(m, caddr_t));
84 m->m_len = m->m_pkthdr.len;
89 return (m_defrag(m0, how));
93 rtwn_pci_tx_start_frame(struct rtwn_softc *sc, struct ieee80211_node *ni,
94 struct mbuf *m, uint8_t *tx_desc, uint8_t type)
96 struct rtwn_pci_softc *pc = RTWN_PCI_SOFTC(sc);
97 struct rtwn_tx_ring *ring;
98 struct rtwn_tx_data *data;
99 struct rtwn_tx_desc_common *txd;
100 bus_dma_segment_t segs[1];
104 RTWN_ASSERT_LOCKED(sc);
107 case IEEE80211_FC0_TYPE_CTL:
108 case IEEE80211_FC0_TYPE_MGT:
109 qid = RTWN_PCI_MGNT_QUEUE;
112 qid = M_WME_GETAC(m);
116 ring = &pc->tx_ring[qid];
117 data = &ring->tx_data[ring->cur];
118 if (data->m != NULL) {
119 RTWN_DPRINTF(sc, RTWN_DEBUG_XMIT,
120 "%s: ring #%u is full (m %p)\n", __func__, qid, data->m);
124 txd = (struct rtwn_tx_desc_common *)
125 ((uint8_t *)ring->desc + sc->txdesc_len * ring->cur);
126 if (txd->flags0 & RTWN_FLAGS0_OWN) {
127 device_printf(sc->sc_dev,
128 "%s: OWN bit is set (tx desc %d, ring %u)!\n",
129 __func__, ring->cur, qid);
133 /* Copy Tx descriptor. */
134 rtwn_pci_copy_tx_desc(pc, txd, tx_desc);
135 txd->pktlen = htole16(m->m_pkthdr.len);
136 txd->offset = sc->txdesc_len;
138 error = bus_dmamap_load_mbuf_sg(ring->data_dmat, data->map, m, segs,
139 &nsegs, BUS_DMA_NOWAIT);
140 if (error != 0 && error != EFBIG) {
141 device_printf(sc->sc_dev, "can't map mbuf (error %d)\n",
148 mnew = rtwn_mbuf_defrag(m, M_NOWAIT);
150 device_printf(sc->sc_dev, "can't defragment mbuf\n");
155 error = bus_dmamap_load_mbuf_sg(ring->data_dmat, data->map, m,
156 segs, &nsegs, BUS_DMA_NOWAIT);
158 device_printf(sc->sc_dev,
159 "can't map mbuf (error %d)\n", error);
161 if_inc_counter(ni->ni_vap->iv_ifp,
162 IFCOUNTER_OERRORS, 1);
163 ieee80211_free_node(ni);
166 return (0); /* XXX */
170 rtwn_pci_tx_postsetup(pc, txd, segs);
171 txd->flags0 |= RTWN_FLAGS0_OWN;
173 /* Dump Tx descriptor. */
174 rtwn_dump_tx_desc(sc, txd);
176 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
177 BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
178 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
183 ring->cur = (ring->cur + 1) % RTWN_PCI_TX_LIST_COUNT;
186 if (ring->queued >= (RTWN_PCI_TX_LIST_COUNT - 1))
187 sc->qfullmsk |= (1 << qid);
194 rtwn_write_2(sc, R92C_PCIE_CTRL_REG, (1 << qid));
200 rtwn_pci_tx_start_beacon(struct rtwn_softc *sc, struct mbuf *m,
201 uint8_t *tx_desc, int id)
203 struct rtwn_pci_softc *pc = RTWN_PCI_SOFTC(sc);
204 struct rtwn_tx_ring *ring;
205 struct rtwn_tx_data *data;
206 struct rtwn_tx_desc_common *txd;
207 bus_dma_segment_t segs[1];
208 int nsegs, error, own;
210 RTWN_ASSERT_LOCKED(sc);
212 KASSERT(id == 0 || id == 1, ("bogus vap id %d\n", id));
214 ring = &pc->tx_ring[RTWN_PCI_BEACON_QUEUE];
215 data = &ring->tx_data[id];
216 txd = (struct rtwn_tx_desc_common *)
217 ((uint8_t *)ring->desc + id * sc->txdesc_len);
219 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
220 BUS_DMASYNC_POSTREAD);
221 own = !!(txd->flags0 & RTWN_FLAGS0_OWN);
223 if (!own || txd->pktlen != htole16(m->m_pkthdr.len)) {
225 /* Copy Tx descriptor. */
226 rtwn_pci_copy_tx_desc(pc, txd, tx_desc);
227 txd->offset = sc->txdesc_len;
230 bus_dmamap_unload(ring->data_dmat, data->map);
233 error = bus_dmamap_load_mbuf_sg(ring->data_dmat,
234 data->map, m, segs, &nsegs, BUS_DMA_NOWAIT);
236 device_printf(sc->sc_dev,
237 "can't map beacon (error %d)\n", error);
238 txd->flags0 &= ~RTWN_FLAGS0_OWN;
242 txd->pktlen = htole16(m->m_pkthdr.len);
243 rtwn_pci_tx_postsetup(pc, txd, segs);
244 txd->flags0 |= RTWN_FLAGS0_OWN;
246 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
247 BUS_DMASYNC_PREWRITE);
250 /* Dump Tx descriptor. */
251 rtwn_dump_tx_desc(sc, txd);
253 bus_dmamap_sync(ring->data_dmat, data->map, BUS_DMASYNC_PREWRITE);
259 rtwn_pci_tx_start(struct rtwn_softc *sc, struct ieee80211_node *ni,
260 struct mbuf *m, uint8_t *tx_desc, uint8_t type, int id)
264 RTWN_ASSERT_LOCKED(sc);
266 if (ni == NULL) /* beacon frame */
267 error = rtwn_pci_tx_start_beacon(sc, m, tx_desc, id);
269 error = rtwn_pci_tx_start_frame(sc, ni, m, tx_desc, type);