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>
38 #include <sys/epoch.h>
40 #include <machine/bus.h>
41 #include <machine/resource.h>
45 #include <net/ethernet.h>
46 #include <net/if_media.h>
48 #include <net80211/ieee80211_var.h>
50 #include <dev/rtwn/if_rtwnreg.h>
51 #include <dev/rtwn/if_rtwnvar.h>
52 #include <dev/rtwn/if_rtwn_debug.h>
53 #include <dev/rtwn/if_rtwn_rx.h>
54 #include <dev/rtwn/if_rtwn_task.h>
55 #include <dev/rtwn/if_rtwn_tx.h>
57 #include <dev/rtwn/pci/rtwn_pci_var.h>
58 #include <dev/rtwn/pci/rtwn_pci_rx.h>
61 rtwn_pci_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nsegs,
67 KASSERT(nsegs == 1, ("too many DMA segments, %d should be 1", nsegs));
68 *(bus_addr_t *)arg = segs[0].ds_addr;
72 rtwn_pci_setup_rx_desc(struct rtwn_pci_softc *pc,
73 struct rtwn_rx_stat_pci *desc, bus_addr_t addr, size_t len, int idx)
76 memset(desc, 0, sizeof(*desc));
77 desc->rxdw0 = htole32(SM(RTWN_RXDW0_PKTLEN, len) |
78 ((idx == RTWN_PCI_RX_LIST_COUNT - 1) ? RTWN_RXDW0_EOR : 0));
79 desc->rxbufaddr = htole32(addr);
80 bus_space_barrier(pc->pc_st, pc->pc_sh, 0, pc->pc_mapsize,
81 BUS_SPACE_BARRIER_WRITE);
82 desc->rxdw0 |= htole32(RTWN_RXDW0_OWN);
86 rtwn_pci_rx_frame(struct rtwn_pci_softc *pc)
88 struct epoch_tracker et;
89 struct rtwn_softc *sc = &pc->pc_sc;
90 struct rtwn_rx_ring *ring = &pc->rx_ring;
91 struct rtwn_rx_stat_pci *rx_desc = &ring->desc[ring->cur];
92 struct rtwn_rx_data *rx_data = &ring->rx_data[ring->cur];
93 struct ieee80211com *ic = &sc->sc_ic;
94 struct ieee80211_node *ni;
97 int infosz, pktlen, shift, error;
99 /* Dump Rx descriptor. */
100 RTWN_DPRINTF(sc, RTWN_DEBUG_RECV_DESC,
101 "%s: dw: 0 %08X, 1 %08X, 2 %08X, 3 %08X, 4 %08X, tsfl %08X, "
102 "addr: %08X (64: %08X)\n",
103 __func__, le32toh(rx_desc->rxdw0), le32toh(rx_desc->rxdw1),
104 le32toh(rx_desc->rxdw2), le32toh(rx_desc->rxdw3),
105 le32toh(rx_desc->rxdw4), le32toh(rx_desc->tsf_low),
106 le32toh(rx_desc->rxbufaddr), le32toh(rx_desc->rxbufaddr64));
108 rxdw0 = le32toh(rx_desc->rxdw0);
109 if (__predict_false(rxdw0 & (RTWN_RXDW0_CRCERR | RTWN_RXDW0_ICVERR))) {
111 * This should not happen since we setup our Rx filter
112 * to not receive these frames.
114 RTWN_DPRINTF(sc, RTWN_DEBUG_RECV,
115 "%s: RX flags error (%s)\n", __func__,
116 rxdw0 & RTWN_RXDW0_CRCERR ? "CRC" : "ICV");
120 pktlen = MS(rxdw0, RTWN_RXDW0_PKTLEN);
121 if (__predict_false(pktlen < sizeof(struct ieee80211_frame_ack) ||
122 pktlen > MJUMPAGESIZE)) {
123 RTWN_DPRINTF(sc, RTWN_DEBUG_RECV,
124 "%s: frame is too short/long: %d\n", __func__, pktlen);
128 infosz = MS(rxdw0, RTWN_RXDW0_INFOSZ) * 8;
129 shift = MS(rxdw0, RTWN_RXDW0_SHIFT);
131 m1 = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE);
132 if (__predict_false(m1 == NULL)) {
133 device_printf(sc->sc_dev, "%s: could not allocate RX mbuf\n",
137 bus_dmamap_sync(ring->data_dmat, rx_data->map, BUS_DMASYNC_POSTREAD);
138 bus_dmamap_unload(ring->data_dmat, rx_data->map);
140 error = bus_dmamap_load(ring->data_dmat, rx_data->map, mtod(m1, void *),
141 MJUMPAGESIZE, rtwn_pci_dma_map_addr, &rx_data->paddr, 0);
145 error = bus_dmamap_load(ring->data_dmat, rx_data->map,
146 mtod(rx_data->m, void *), MJUMPAGESIZE,
147 rtwn_pci_dma_map_addr, &rx_data->paddr, BUS_DMA_NOWAIT);
149 panic("%s: could not load old RX mbuf",
150 device_get_name(sc->sc_dev));
158 m->m_pkthdr.len = m->m_len = pktlen + infosz + shift;
160 ni = rtwn_rx_common(sc, m, rx_desc);
162 RTWN_DPRINTF(sc, RTWN_DEBUG_RECV,
163 "%s: Rx frame len %d, infosz %d, shift %d\n",
164 __func__, pktlen, infosz, shift);
166 /* Send the frame to the 802.11 layer. */
171 (void)ieee80211_input_mimo(ni, m);
172 /* Node is no longer needed. */
173 ieee80211_free_node(ni);
175 (void)ieee80211_input_mimo_all(ic, m);
183 counter_u64_add(ic->ic_ierrors, 1);
187 rtwn_pci_rx_buf_copy(struct rtwn_pci_softc *pc)
189 struct rtwn_rx_ring *ring = &pc->rx_ring;
190 struct rtwn_rx_stat_pci *rx_desc = &ring->desc[ring->cur];
191 struct rtwn_rx_data *rx_data = &ring->rx_data[ring->cur];
193 int desc_size, pktlen;
196 * NB: tx_report() / c2h_report() expects to see USB Rx
197 * descriptor - same as for PCIe, but without rxbufaddr* fields.
199 desc_size = sizeof(struct rtwn_rx_stat_common);
200 KASSERT(sizeof(pc->pc_rx_buf) >= desc_size,
201 ("adjust size for PCIe Rx buffer!"));
203 memcpy(pc->pc_rx_buf, rx_desc, desc_size);
205 rxdw0 = le32toh(rx_desc->rxdw0);
206 pktlen = MS(rxdw0, RTWN_RXDW0_PKTLEN);
208 if (pktlen > sizeof(pc->pc_rx_buf) - desc_size)
210 /* Looks like an ordinary Rx frame. */
214 bus_dmamap_sync(ring->data_dmat, rx_data->map, BUS_DMASYNC_POSTREAD);
215 memcpy(pc->pc_rx_buf + desc_size, mtod(rx_data->m, void *), pktlen);
217 return (desc_size + pktlen);
221 rtwn_pci_tx_report(struct rtwn_pci_softc *pc, int len)
223 struct rtwn_softc *sc = &pc->pc_sc;
225 if (sc->sc_ratectl != RTWN_RATECTL_NET80211) {
226 /* shouldn't happen */
227 device_printf(sc->sc_dev,
228 "%s called while ratectl = %d!\n",
229 __func__, sc->sc_ratectl);
234 rtwn_handle_tx_report(sc, pc->pc_rx_buf, len);
237 #ifdef IEEE80211_SUPPORT_SUPERG
239 * NB: this will executed only when 'report' bit is set.
241 if (sc->sc_tx_n_active > 0 && --sc->sc_tx_n_active <= 1)
242 rtwn_cmd_sleepable(sc, NULL, 0, rtwn_ff_flush_all);
247 rtwn_pci_c2h_report(struct rtwn_pci_softc *pc, int len)
249 rtwn_handle_c2h_report(&pc->pc_sc, pc->pc_rx_buf, len);
253 rtwn_pci_tx_done(struct rtwn_softc *sc, int qid)
255 struct rtwn_pci_softc *pc = RTWN_PCI_SOFTC(sc);
256 struct rtwn_tx_ring *ring = &pc->tx_ring[qid];
257 struct rtwn_tx_desc_common *desc;
258 struct rtwn_tx_data *data;
260 RTWN_DPRINTF(sc, RTWN_DEBUG_INTR, "%s: qid %d, last %d, cur %d\n",
261 __func__, qid, ring->last, ring->cur);
263 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
264 BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
266 while(ring->last != ring->cur) {
267 data = &ring->tx_data[ring->last];
268 desc = (struct rtwn_tx_desc_common *)
269 ((uint8_t *)ring->desc + sc->txdesc_len * ring->last);
271 KASSERT(data->m != NULL, ("no mbuf"));
273 if (desc->flags0 & RTWN_FLAGS0_OWN)
276 /* Unmap and free mbuf. */
277 bus_dmamap_sync(ring->data_dmat, data->map,
278 BUS_DMASYNC_POSTWRITE);
279 bus_dmamap_unload(ring->data_dmat, data->map);
281 if (data->ni != NULL) { /* not a beacon frame */
282 ieee80211_tx_complete(data->ni, data->m, 0);
286 KASSERT(ring->queued >= 0,
287 ("ring->queued (qid %d) underflow!\n", qid));
292 ring->last = (ring->last + 1) % RTWN_PCI_TX_LIST_COUNT;
294 if (ring->queued > 0)
301 if ((sc->qfullmsk & (1 << qid)) != 0 &&
302 ring->queued < (RTWN_PCI_TX_LIST_COUNT - 1)) {
303 sc->qfullmsk &= ~(1 << qid);
307 #ifdef IEEE80211_SUPPORT_SUPERG
309 * If the TX active queue drops below a certain
310 * threshold, ensure we age fast-frames out so they're
313 if (sc->sc_ratectl != RTWN_RATECTL_NET80211 && ring->queued <= 1) {
315 * XXX TODO: just make this a callout timer schedule
316 * so we can flush the FF staging queue if we're
319 rtwn_cmd_sleepable(sc, NULL, 0, rtwn_ff_flush_all);
325 rtwn_pci_rx_done(struct rtwn_softc *sc)
327 struct rtwn_pci_softc *pc = RTWN_PCI_SOFTC(sc);
328 struct rtwn_rx_ring *ring = &pc->rx_ring;
329 struct rtwn_rx_stat_pci *rx_desc;
330 struct rtwn_rx_data *rx_data;
333 bus_dmamap_sync(ring->desc_dmat, ring->desc_map, BUS_DMASYNC_POSTREAD);
336 rx_desc = &ring->desc[ring->cur];
337 rx_data = &ring->rx_data[ring->cur];
339 if (le32toh(rx_desc->rxdw0) & RTWN_RXDW0_OWN)
342 len = rtwn_pci_rx_buf_copy(pc);
344 switch (rtwn_classify_intr(sc, pc->pc_rx_buf, len)) {
346 rtwn_pci_rx_frame(pc);
348 case RTWN_RX_TX_REPORT:
349 rtwn_pci_tx_report(pc, len);
352 rtwn_pci_c2h_report(pc, len);
356 KASSERT(0, ("unknown Rx classification code"));
360 /* Update / reset RX descriptor (and set OWN bit). */
361 rtwn_pci_setup_rx_desc(pc, rx_desc, rx_data->paddr,
362 MJUMPAGESIZE, ring->cur);
364 if (!(sc->sc_flags & RTWN_RUNNING))
367 /* NB: device can reuse current descriptor. */
368 bus_dmamap_sync(ring->desc_dmat, ring->desc_map,
369 BUS_DMASYNC_POSTREAD);
371 if (le32toh(rx_desc->rxdw0) & RTWN_RXDW0_OWN)
372 ring->cur = (ring->cur + 1) % RTWN_PCI_RX_LIST_COUNT;
377 rtwn_pci_intr(void *arg)
379 struct rtwn_softc *sc = arg;
380 struct rtwn_pci_softc *pc = RTWN_PCI_SOFTC(sc);
381 int i, status, tx_rings;
384 status = rtwn_pci_get_intr_status(pc, &tx_rings);
385 RTWN_DPRINTF(sc, RTWN_DEBUG_INTR, "%s: status %08X, tx_rings %08X\n",
386 __func__, status, tx_rings);
387 if (status == 0 && tx_rings == 0)
390 if (status & (RTWN_PCI_INTR_RX | RTWN_PCI_INTR_TX_REPORT)) {
391 rtwn_pci_rx_done(sc);
392 if (!(sc->sc_flags & RTWN_RUNNING))
397 for (i = 0; i < RTWN_PCI_NTXQUEUES; i++)
398 if (tx_rings & (1 << i))
399 rtwn_pci_tx_done(sc, i);
401 if (sc->sc_flags & RTWN_RUNNING)
402 rtwn_pci_enable_intr(pc);