| if_ath.c (248986) | if_ath.c (248988) |
|---|---|
| 1/*- 2 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 14 unchanged lines hidden (view full) --- 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27 * THE POSSIBILITY OF SUCH DAMAGES. 28 */ 29 30#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright --- 14 unchanged lines hidden (view full) --- 23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER 25 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 27 * THE POSSIBILITY OF SUCH DAMAGES. 28 */ 29 30#include <sys/cdefs.h> |
| 31__FBSDID("$FreeBSD: head/sys/dev/ath/if_ath.c 248986 2013-04-01 20:44:21Z adrian $"); | 31__FBSDID("$FreeBSD: head/sys/dev/ath/if_ath.c 248988 2013-04-01 20:57:13Z adrian $"); |
| 32 33/* 34 * Driver for the Atheros Wireless LAN controller. 35 * 36 * This software is derived from work of Atsushi Onoe; his contribution 37 * is greatly appreciated. 38 */ 39 --- 2467 unchanged lines hidden (view full) --- 2507 * The descriptor is also copied but the link pointers and 2508 * the DMA segments aren't copied; this frame should thus 2509 * be again passed through the descriptor setup/chain routines 2510 * so the link is correct. 2511 * 2512 * The caller must free the buffer using ath_freebuf(). 2513 */ 2514struct ath_buf * | 32 33/* 34 * Driver for the Atheros Wireless LAN controller. 35 * 36 * This software is derived from work of Atsushi Onoe; his contribution 37 * is greatly appreciated. 38 */ 39 --- 2467 unchanged lines hidden (view full) --- 2507 * The descriptor is also copied but the link pointers and 2508 * the DMA segments aren't copied; this frame should thus 2509 * be again passed through the descriptor setup/chain routines 2510 * so the link is correct. 2511 * 2512 * The caller must free the buffer using ath_freebuf(). 2513 */ 2514struct ath_buf * |
| 2515ath_buf_clone(struct ath_softc *sc, const struct ath_buf *bf) | 2515ath_buf_clone(struct ath_softc *sc, struct ath_buf *bf) |
| 2516{ 2517 struct ath_buf *tbf; 2518 2519 tbf = ath_getbuf(sc, 2520 (bf->bf_flags & ATH_BUF_MGMT) ? 2521 ATH_BUFTYPE_MGMT : ATH_BUFTYPE_NORMAL); 2522 if (tbf == NULL) 2523 return NULL; /* XXX failure? Why? */ 2524 2525 /* Copy basics */ 2526 tbf->bf_next = NULL; 2527 tbf->bf_nseg = bf->bf_nseg; 2528 tbf->bf_flags = bf->bf_flags & ATH_BUF_FLAGS_CLONE; 2529 tbf->bf_status = bf->bf_status; 2530 tbf->bf_m = bf->bf_m; | 2516{ 2517 struct ath_buf *tbf; 2518 2519 tbf = ath_getbuf(sc, 2520 (bf->bf_flags & ATH_BUF_MGMT) ? 2521 ATH_BUFTYPE_MGMT : ATH_BUFTYPE_NORMAL); 2522 if (tbf == NULL) 2523 return NULL; /* XXX failure? Why? */ 2524 2525 /* Copy basics */ 2526 tbf->bf_next = NULL; 2527 tbf->bf_nseg = bf->bf_nseg; 2528 tbf->bf_flags = bf->bf_flags & ATH_BUF_FLAGS_CLONE; 2529 tbf->bf_status = bf->bf_status; 2530 tbf->bf_m = bf->bf_m; |
| 2531 /* 2532 * XXX Copy the node reference, the caller is responsible 2533 * for deleting the node reference before it frees its 2534 * buffer. 2535 * 2536 * XXX It's done like this so we don't call the net80211 2537 * code whilst having active TX queue locks held. 2538 */ | |
| 2539 tbf->bf_node = bf->bf_node; 2540 /* will be setup by the chain/setup function */ 2541 tbf->bf_lastds = NULL; 2542 /* for now, last == self */ 2543 tbf->bf_last = tbf; 2544 tbf->bf_comp = bf->bf_comp; 2545 2546 /* NOTE: DMA segments will be setup by the setup/chain functions */ 2547 2548 /* The caller has to re-init the descriptor + links */ 2549 | 2531 tbf->bf_node = bf->bf_node; 2532 /* will be setup by the chain/setup function */ 2533 tbf->bf_lastds = NULL; 2534 /* for now, last == self */ 2535 tbf->bf_last = tbf; 2536 tbf->bf_comp = bf->bf_comp; 2537 2538 /* NOTE: DMA segments will be setup by the setup/chain functions */ 2539 2540 /* The caller has to re-init the descriptor + links */ 2541 |
| 2542 /* 2543 * Free the DMA mapping here, before we NULL the mbuf. 2544 * We must only call bus_dmamap_unload() once per mbuf chain 2545 * or behaviour is undefined. 2546 */ 2547 if (bf->bf_m != NULL) { 2548 /* 2549 * XXX is this POSTWRITE call required? 2550 */ 2551 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 2552 BUS_DMASYNC_POSTWRITE); 2553 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 2554 } 2555 2556 bf->bf_m = NULL; 2557 bf->bf_node = NULL; 2558 |
|
| 2550 /* Copy state */ 2551 memcpy(&tbf->bf_state, &bf->bf_state, sizeof(bf->bf_state)); 2552 2553 return tbf; 2554} 2555 2556struct ath_buf * 2557ath_getbuf(struct ath_softc *sc, ath_buf_type_t btype) --- 1657 unchanged lines hidden (view full) --- 4215 * buffer on the list is now not involved in a halted TX DMA queue, waiting 4216 * for restart (eg for TDMA.) 4217 * 4218 * The caller must free the mbuf and recycle the node reference. 4219 */ 4220void 4221ath_freebuf(struct ath_softc *sc, struct ath_buf *bf) 4222{ | 2559 /* Copy state */ 2560 memcpy(&tbf->bf_state, &bf->bf_state, sizeof(bf->bf_state)); 2561 2562 return tbf; 2563} 2564 2565struct ath_buf * 2566ath_getbuf(struct ath_softc *sc, ath_buf_type_t btype) --- 1657 unchanged lines hidden (view full) --- 4224 * buffer on the list is now not involved in a halted TX DMA queue, waiting 4225 * for restart (eg for TDMA.) 4226 * 4227 * The caller must free the mbuf and recycle the node reference. 4228 */ 4229void 4230ath_freebuf(struct ath_softc *sc, struct ath_buf *bf) 4231{ |
| 4223 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 4224 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, BUS_DMASYNC_POSTWRITE); 4225 | |
| 4226 KASSERT((bf->bf_node == NULL), ("%s: bf->bf_node != NULL\n", __func__)); 4227 KASSERT((bf->bf_m == NULL), ("%s: bf->bf_m != NULL\n", __func__)); 4228 4229 /* 4230 * If this buffer is busy, push it onto the holding queue 4231 */ 4232 if (bf->bf_flags & ATH_BUF_BUSY) { 4233 ATH_TXBUF_LOCK(sc); --- 17 unchanged lines hidden (view full) --- 4251 * It recycles a single ath_buf. 4252 */ 4253void 4254ath_tx_freebuf(struct ath_softc *sc, struct ath_buf *bf, int status) 4255{ 4256 struct ieee80211_node *ni = bf->bf_node; 4257 struct mbuf *m0 = bf->bf_m; 4258 | 4232 KASSERT((bf->bf_node == NULL), ("%s: bf->bf_node != NULL\n", __func__)); 4233 KASSERT((bf->bf_m == NULL), ("%s: bf->bf_m != NULL\n", __func__)); 4234 4235 /* 4236 * If this buffer is busy, push it onto the holding queue 4237 */ 4238 if (bf->bf_flags & ATH_BUF_BUSY) { 4239 ATH_TXBUF_LOCK(sc); --- 17 unchanged lines hidden (view full) --- 4257 * It recycles a single ath_buf. 4258 */ 4259void 4260ath_tx_freebuf(struct ath_softc *sc, struct ath_buf *bf, int status) 4261{ 4262 struct ieee80211_node *ni = bf->bf_node; 4263 struct mbuf *m0 = bf->bf_m; 4264 |
| 4265 /* 4266 * Make sure that we only sync/unload if there's an mbuf. 4267 * If not (eg we cloned a buffer), the unload will have already 4268 * occured. 4269 */ 4270 if (bf->bf_m != NULL) { 4271 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap, 4272 BUS_DMASYNC_POSTWRITE); 4273 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap); 4274 } 4275 |
|
| 4259 bf->bf_node = NULL; 4260 bf->bf_m = NULL; 4261 4262 /* Free the buffer, it's not needed any longer */ 4263 ath_freebuf(sc, bf); 4264 4265 if (ni != NULL) { 4266 /* 4267 * Do any callback and reclaim the node reference. 4268 */ 4269 if (m0->m_flags & M_TXCB) 4270 ieee80211_process_callback(ni, m0, status); 4271 ieee80211_free_node(ni); 4272 } | 4276 bf->bf_node = NULL; 4277 bf->bf_m = NULL; 4278 4279 /* Free the buffer, it's not needed any longer */ 4280 ath_freebuf(sc, bf); 4281 4282 if (ni != NULL) { 4283 /* 4284 * Do any callback and reclaim the node reference. 4285 */ 4286 if (m0->m_flags & M_TXCB) 4287 ieee80211_process_callback(ni, m0, status); 4288 ieee80211_free_node(ni); 4289 } |
| 4273 m_freem(m0); | |
| 4274 | 4290 |
| 4275 /* 4276 * XXX the buffer used to be freed -after-, but the DMA map was 4277 * freed where ath_freebuf() now is. I've no idea what this 4278 * will do. 4279 */ | 4291 /* Finally, we don't need this mbuf any longer */ 4292 m_freem(m0); |
| 4280} 4281 4282static struct ath_buf * 4283ath_tx_draintxq_get_one(struct ath_softc *sc, struct ath_txq *txq) 4284{ 4285 struct ath_buf *bf; 4286 4287 ATH_TXQ_LOCK_ASSERT(txq); --- 1653 unchanged lines hidden --- | 4293} 4294 4295static struct ath_buf * 4296ath_tx_draintxq_get_one(struct ath_softc *sc, struct ath_txq *txq) 4297{ 4298 struct ath_buf *bf; 4299 4300 ATH_TXQ_LOCK_ASSERT(txq); --- 1653 unchanged lines hidden --- |