2 * Copyright (c) 2002-2009 Sam Leffler, Errno Consulting
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer,
10 * without modification.
11 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
12 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
13 * redistribution must be conditioned upon including a substantially
14 * similar Disclaimer requirement for further binary redistribution.
17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
20 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
21 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
22 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
34 * Driver for the Atheros Wireless LAN controller.
36 * This software is derived from work of Atsushi Onoe; his contribution
37 * is greatly appreciated.
43 * This is needed for register operations which are performed
44 * by the driver - eg, calls to ath_hal_gettsf32().
46 * It's also required for any AH_DEBUG checks in here, eg the
47 * module dependencies.
52 #include <sys/param.h>
53 #include <sys/systm.h>
54 #include <sys/sysctl.h>
56 #include <sys/malloc.h>
58 #include <sys/mutex.h>
59 #include <sys/kernel.h>
60 #include <sys/socket.h>
61 #include <sys/sockio.h>
62 #include <sys/errno.h>
63 #include <sys/callout.h>
65 #include <sys/endian.h>
66 #include <sys/kthread.h>
67 #include <sys/taskqueue.h>
69 #include <sys/module.h>
71 #include <sys/smp.h> /* for mp_ncpus */
73 #include <machine/bus.h>
76 #include <net/if_var.h>
77 #include <net/if_dl.h>
78 #include <net/if_media.h>
79 #include <net/if_types.h>
80 #include <net/if_arp.h>
81 #include <net/ethernet.h>
82 #include <net/if_llc.h>
84 #include <net80211/ieee80211_var.h>
85 #include <net80211/ieee80211_regdomain.h>
86 #ifdef IEEE80211_SUPPORT_SUPERG
87 #include <net80211/ieee80211_superg.h>
89 #ifdef IEEE80211_SUPPORT_TDMA
90 #include <net80211/ieee80211_tdma.h>
96 #include <netinet/in.h>
97 #include <netinet/if_ether.h>
100 #include <dev/ath/if_athvar.h>
101 #include <dev/ath/ath_hal/ah_devid.h> /* XXX for softled */
102 #include <dev/ath/ath_hal/ah_diagcodes.h>
104 #include <dev/ath/if_ath_debug.h>
105 #include <dev/ath/if_ath_misc.h>
107 #include <dev/ath/if_ath_tsf.h>
108 #include <dev/ath/if_ath_tx.h>
109 #include <dev/ath/if_ath_sysctl.h>
110 #include <dev/ath/if_ath_led.h>
111 #include <dev/ath/if_ath_keycache.h>
112 #include <dev/ath/if_ath_rx.h>
113 #include <dev/ath/if_ath_rx_edma.h>
114 #include <dev/ath/if_ath_tx_edma.h>
115 #include <dev/ath/if_ath_beacon.h>
116 #include <dev/ath/if_ath_btcoex.h>
117 #include <dev/ath/if_ath_spectral.h>
118 #include <dev/ath/if_ath_lna_div.h>
119 #include <dev/ath/if_athdfs.h>
121 #include <dev/ath/if_ath_descdma.h>
123 MALLOC_DECLARE(M_ATHDEV);
126 * This is the descriptor setup / busdma memory intialisation and
131 ath_load_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
133 bus_addr_t *paddr = (bus_addr_t*) arg;
134 KASSERT(error == 0, ("error %u on bus_dma callback", error));
135 *paddr = segs->ds_addr;
139 * Allocate the descriptors and appropriate DMA tag/setup.
141 * For some situations (eg EDMA TX completion), there isn't a requirement
142 * for the ath_buf entries to be allocated.
145 ath_descdma_alloc_desc(struct ath_softc *sc,
146 struct ath_descdma *dd, ath_bufhead *head,
147 const char *name, int ds_size, int ndesc)
149 #define DS2PHYS(_dd, _ds) \
150 ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc))
151 #define ATH_DESC_4KB_BOUND_CHECK(_daddr, _len) \
152 ((((u_int32_t)(_daddr) & 0xFFF) > (0x1000 - (_len))) ? 1 : 0)
155 dd->dd_descsize = ds_size;
157 DPRINTF(sc, ATH_DEBUG_RESET,
158 "%s: %s DMA: %u desc, %d bytes per descriptor\n",
159 __func__, name, ndesc, dd->dd_descsize);
162 dd->dd_desc_len = dd->dd_descsize * ndesc;
165 * Merlin work-around:
166 * Descriptors that cross the 4KB boundary can't be used.
167 * Assume one skipped descriptor per 4KB page.
169 if (! ath_hal_split4ktrans(sc->sc_ah)) {
170 int numpages = dd->dd_desc_len / 4096;
171 dd->dd_desc_len += ds_size * numpages;
175 * Setup DMA descriptor area.
177 * BUS_DMA_ALLOCNOW is not used; we never use bounce
178 * buffers for the descriptors themselves.
180 error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), /* parent */
181 PAGE_SIZE, 0, /* alignment, bounds */
182 BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
183 BUS_SPACE_MAXADDR, /* highaddr */
184 NULL, NULL, /* filter, filterarg */
185 dd->dd_desc_len, /* maxsize */
187 dd->dd_desc_len, /* maxsegsize */
193 device_printf(sc->sc_dev,
194 "cannot allocate %s DMA tag\n", dd->dd_name);
198 /* allocate descriptors */
199 error = bus_dmamem_alloc(dd->dd_dmat, (void**) &dd->dd_desc,
200 BUS_DMA_NOWAIT | BUS_DMA_COHERENT,
203 device_printf(sc->sc_dev,
204 "unable to alloc memory for %u %s descriptors, error %u\n",
205 ndesc, dd->dd_name, error);
209 error = bus_dmamap_load(dd->dd_dmat, dd->dd_dmamap,
210 dd->dd_desc, dd->dd_desc_len,
211 ath_load_cb, &dd->dd_desc_paddr,
214 device_printf(sc->sc_dev,
215 "unable to map %s descriptors, error %u\n",
220 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA map: %p (%lu) -> %p (%lu)\n",
221 __func__, dd->dd_name, (uint8_t *) dd->dd_desc,
222 (u_long) dd->dd_desc_len, (caddr_t) dd->dd_desc_paddr,
223 /*XXX*/ (u_long) dd->dd_desc_len);
228 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap);
230 bus_dma_tag_destroy(dd->dd_dmat);
231 memset(dd, 0, sizeof(*dd));
234 #undef ATH_DESC_4KB_BOUND_CHECK
238 ath_descdma_setup(struct ath_softc *sc,
239 struct ath_descdma *dd, ath_bufhead *head,
240 const char *name, int ds_size, int nbuf, int ndesc)
242 #define DS2PHYS(_dd, _ds) \
243 ((_dd)->dd_desc_paddr + ((caddr_t)(_ds) - (caddr_t)(_dd)->dd_desc))
244 #define ATH_DESC_4KB_BOUND_CHECK(_daddr, _len) \
245 ((((u_int32_t)(_daddr) & 0xFFF) > (0x1000 - (_len))) ? 1 : 0)
250 /* Allocate descriptors */
251 error = ath_descdma_alloc_desc(sc, dd, head, name, ds_size,
254 /* Assume any errors during allocation were dealt with */
259 ds = (uint8_t *) dd->dd_desc;
261 /* allocate rx buffers */
262 bsize = sizeof(struct ath_buf) * nbuf;
263 bf = malloc(bsize, M_ATHDEV, M_NOWAIT | M_ZERO);
265 device_printf(sc->sc_dev,
266 "malloc of %s buffers failed, size %u\n",
273 for (i = 0; i < nbuf; i++, bf++, ds += (ndesc * dd->dd_descsize)) {
274 bf->bf_desc = (struct ath_desc *) ds;
275 bf->bf_daddr = DS2PHYS(dd, ds);
276 if (! ath_hal_split4ktrans(sc->sc_ah)) {
278 * Merlin WAR: Skip descriptor addresses which
279 * cause 4KB boundary crossing along any point
282 if (ATH_DESC_4KB_BOUND_CHECK(bf->bf_daddr,
284 /* Start at the next page */
285 ds += 0x1000 - (bf->bf_daddr & 0xFFF);
286 bf->bf_desc = (struct ath_desc *) ds;
287 bf->bf_daddr = DS2PHYS(dd, ds);
290 error = bus_dmamap_create(sc->sc_dmat, BUS_DMA_NOWAIT,
293 device_printf(sc->sc_dev, "unable to create dmamap "
294 "for %s buffer %u, error %u\n",
295 dd->dd_name, i, error);
296 ath_descdma_cleanup(sc, dd, head);
299 bf->bf_lastds = bf->bf_desc; /* Just an initial value */
300 TAILQ_INSERT_TAIL(head, bf, bf_list);
304 * XXX TODO: ensure that ds doesn't overflow the descriptor
305 * allocation otherwise weird stuff will occur and crash your
309 /* XXX this should likely just call ath_descdma_cleanup() */
311 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap);
312 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap);
313 bus_dma_tag_destroy(dd->dd_dmat);
314 memset(dd, 0, sizeof(*dd));
317 #undef ATH_DESC_4KB_BOUND_CHECK
321 * Allocate ath_buf entries but no descriptor contents.
323 * This is for RX EDMA where the descriptors are the header part of
327 ath_descdma_setup_rx_edma(struct ath_softc *sc,
328 struct ath_descdma *dd, ath_bufhead *head,
329 const char *name, int nbuf, int rx_status_len)
334 DPRINTF(sc, ATH_DEBUG_RESET, "%s: %s DMA: %u buffers\n",
335 __func__, name, nbuf);
339 * This is (mostly) purely for show. We're not allocating any actual
340 * descriptors here as EDMA RX has the descriptor be part
343 * However, dd_desc_len is used by ath_descdma_free() to determine
344 * whether we have already freed this DMA mapping.
346 dd->dd_desc_len = rx_status_len * nbuf;
347 dd->dd_descsize = rx_status_len;
349 /* allocate rx buffers */
350 bsize = sizeof(struct ath_buf) * nbuf;
351 bf = malloc(bsize, M_ATHDEV, M_NOWAIT | M_ZERO);
353 device_printf(sc->sc_dev,
354 "malloc of %s buffers failed, size %u\n",
362 for (i = 0; i < nbuf; i++, bf++) {
365 bf->bf_lastds = NULL; /* Just an initial value */
367 error = bus_dmamap_create(sc->sc_dmat, BUS_DMA_NOWAIT,
370 device_printf(sc->sc_dev, "unable to create dmamap "
371 "for %s buffer %u, error %u\n",
372 dd->dd_name, i, error);
373 ath_descdma_cleanup(sc, dd, head);
376 TAILQ_INSERT_TAIL(head, bf, bf_list);
380 memset(dd, 0, sizeof(*dd));
385 ath_descdma_cleanup(struct ath_softc *sc,
386 struct ath_descdma *dd, ath_bufhead *head)
389 struct ieee80211_node *ni;
392 if (dd->dd_dmamap != 0) {
393 bus_dmamap_unload(dd->dd_dmat, dd->dd_dmamap);
394 bus_dmamem_free(dd->dd_dmat, dd->dd_desc, dd->dd_dmamap);
395 bus_dma_tag_destroy(dd->dd_dmat);
399 TAILQ_FOREACH(bf, head, bf_list) {
402 * XXX warn if there's buffers here.
403 * XXX it should have been freed by the
407 if (do_warning == 0) {
409 device_printf(sc->sc_dev,
410 "%s: %s: mbuf should've been"
411 " unmapped/freed!\n",
415 bus_dmamap_sync(sc->sc_dmat, bf->bf_dmamap,
416 BUS_DMASYNC_POSTREAD);
417 bus_dmamap_unload(sc->sc_dmat, bf->bf_dmamap);
421 if (bf->bf_dmamap != NULL) {
422 bus_dmamap_destroy(sc->sc_dmat, bf->bf_dmamap);
423 bf->bf_dmamap = NULL;
429 * Reclaim node reference.
431 ieee80211_free_node(ni);
439 if (dd->dd_bufptr != NULL)
440 free(dd->dd_bufptr, M_ATHDEV);
441 memset(dd, 0, sizeof(*dd));