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rtwn: enable 11n support for RTL8188CE.

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- Increase Rx buffer size from MCLBYTES to MJUMPAGESIZE.
- Provide an additional defragmentation routine for frames larger
than MCLBYTES; that is required by A-MSDU / Atheros Fast-Frames
support to work with current Tx path implementation.

Enabled features list for RTL8188CE:
- Atheros Fast-Frames;
- A-MPDU (Tx / Rx);
- A-MSDU (Tx / Rx; 4k only);
- Short Guard Interval.

Tested with:
- RTL8188CE (STA+AP) + RTL8821AU (STA).
- RTL8188CE (STA) + RTL8188CUS (AP).

Relnotes:	yes
This commit is contained in:
Andriy Voskoboinyk 2016-11-12 17:58:37 +00:00
parent 06a9e29e75
commit a14f9888d9
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=308575
7 changed files with 94 additions and 34 deletions
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5
share/man/man4/rtwn_pci.4
View file

@ -29,7 +29,7 @@
.\"
.\" $FreeBSD$
.\"/
.Dd October 17, 2016
.Dd November 12, 2016
.Dt RTWN_PCI 4
.Os
.Sh NAME
@ -58,6 +58,3 @@ It operates in the 2GHz spectrum only.
.Xr rtwnfw 4 ,
.Xr rtwn_usb 4 ,
.Xr pci 4
.Sh CAVEATS
Most 802.11 capabilities were turned off; some more testing
is required to re-enable them.

2
sys/dev/rtwn/if_rtwn_tx.h
View file

@ -20,7 +20,9 @@
#define IF_RTWN_TX_H
void rtwn_drain_mbufq(struct rtwn_softc *);
#ifdef IEEE80211_SUPPORT_SUPERG
void rtwn_ff_flush_all(struct rtwn_softc *, union sec_param *);
#endif
int rtwn_transmit(struct ieee80211com *, struct mbuf *);
void rtwn_start(struct rtwn_softc *);
int rtwn_raw_xmit(struct ieee80211_node *, struct mbuf *,

19
sys/dev/rtwn/pci/rtwn_pci_attach.c
View file

@ -149,8 +149,8 @@ rtwn_pci_alloc_rx_list(struct rtwn_softc *sc)
/* Create RX buffer DMA tag. */
error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
1, MCLBYTES, 0, NULL, NULL, &rx_ring->data_dmat);
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
MJUMPAGESIZE, 1, MJUMPAGESIZE, 0, NULL, NULL, &rx_ring->data_dmat);
if (error != 0) {
device_printf(sc->sc_dev, "could not create rx buf DMA tag\n");
goto fail;
@ -166,7 +166,8 @@ rtwn_pci_alloc_rx_list(struct rtwn_softc *sc)
goto fail;
}
rx_data->m = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
rx_data->m = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR,
MJUMPAGESIZE);
if (rx_data->m == NULL) {
device_printf(sc->sc_dev,
"could not allocate rx mbuf\n");
@ -175,8 +176,8 @@ rtwn_pci_alloc_rx_list(struct rtwn_softc *sc)
}
error = bus_dmamap_load(rx_ring->data_dmat, rx_data->map,
mtod(rx_data->m, void *), MCLBYTES, rtwn_pci_dma_map_addr,
&rx_data->paddr, BUS_DMA_NOWAIT);
mtod(rx_data->m, void *), MJUMPAGESIZE,
rtwn_pci_dma_map_addr, &rx_data->paddr, BUS_DMA_NOWAIT);
if (error != 0) {
device_printf(sc->sc_dev,
"could not load rx buf DMA map");
@ -184,7 +185,7 @@ rtwn_pci_alloc_rx_list(struct rtwn_softc *sc)
}
rtwn_pci_setup_rx_desc(pc, &rx_ring->desc[i], rx_data->paddr,
MCLBYTES, i);
MJUMPAGESIZE, i);
}
rx_ring->cur = 0;
@ -206,7 +207,7 @@ rtwn_pci_reset_rx_list(struct rtwn_softc *sc)
for (i = 0; i < RTWN_PCI_RX_LIST_COUNT; i++) {
rx_data = &rx_ring->rx_data[i];
rtwn_pci_setup_rx_desc(pc, &rx_ring->desc[i],
rx_data->paddr, MCLBYTES, i);
rx_data->paddr, MJUMPAGESIZE, i);
}
rx_ring->cur = 0;
}
@ -287,8 +288,8 @@ rtwn_pci_alloc_tx_list(struct rtwn_softc *sc, int qid)
BUS_DMASYNC_PREWRITE);
error = bus_dma_tag_create(bus_get_dma_tag(sc->sc_dev), 1, 0,
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES,
1, MCLBYTES, 0, NULL, NULL, &tx_ring->data_dmat);
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
MJUMPAGESIZE, 1, MJUMPAGESIZE, 0, NULL, NULL, &tx_ring->data_dmat);
if (error != 0) {
device_printf(sc->sc_dev, "could not create tx buf DMA tag\n");
goto fail;

52
sys/dev/rtwn/pci/rtwn_pci_rx.c
View file

@ -50,6 +50,7 @@ __FBSDID("$FreeBSD$");
#include <dev/rtwn/if_rtwnvar.h>
#include <dev/rtwn/if_rtwn_debug.h>
#include <dev/rtwn/if_rtwn_rx.h>
#include <dev/rtwn/if_rtwn_task.h>
#include <dev/rtwn/if_rtwn_tx.h>
#include <dev/rtwn/pci/rtwn_pci_var.h>
@ -120,7 +121,7 @@ rtwn_pci_rx_frame(struct rtwn_softc *sc, struct r92ce_rx_stat *rx_desc,
pktlen = MS(rxdw0, R92C_RXDW0_PKTLEN);
if (__predict_false(pktlen < sizeof(struct ieee80211_frame_ack) ||
pktlen > MCLBYTES)) {
pktlen > MJUMPAGESIZE)) {
RTWN_DPRINTF(sc, RTWN_DEBUG_RECV,
"%s: frame is too short/long: %d\n", __func__, pktlen);
goto fail;
@ -129,7 +130,7 @@ rtwn_pci_rx_frame(struct rtwn_softc *sc, struct r92ce_rx_stat *rx_desc,
infosz = MS(rxdw0, R92C_RXDW0_INFOSZ) * 8;
shift = MS(rxdw0, R92C_RXDW0_SHIFT);
m1 = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
m1 = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, MJUMPAGESIZE);
if (__predict_false(m1 == NULL)) {
device_printf(sc->sc_dev, "%s: could not allocate RX mbuf\n",
__func__);
@ -139,20 +140,20 @@ rtwn_pci_rx_frame(struct rtwn_softc *sc, struct r92ce_rx_stat *rx_desc,
bus_dmamap_unload(ring->data_dmat, rx_data->map);
error = bus_dmamap_load(ring->data_dmat, rx_data->map, mtod(m1, void *),
MCLBYTES, rtwn_pci_dma_map_addr, &rx_data->paddr, 0);
MJUMPAGESIZE, rtwn_pci_dma_map_addr, &rx_data->paddr, 0);
if (error != 0) {
m_freem(m1);
error = bus_dmamap_load(ring->data_dmat, rx_data->map,
mtod(rx_data->m, void *), MCLBYTES, rtwn_pci_dma_map_addr,
&rx_data->paddr, BUS_DMA_NOWAIT);
mtod(rx_data->m, void *), MJUMPAGESIZE,
rtwn_pci_dma_map_addr, &rx_data->paddr, BUS_DMA_NOWAIT);
if (error != 0)
panic("%s: could not load old RX mbuf",
device_get_name(sc->sc_dev));
/* Physical address may have changed. */
rtwn_pci_setup_rx_desc(pc, rx_desc, rx_data->paddr, MCLBYTES,
desc_idx);
rtwn_pci_setup_rx_desc(pc, rx_desc, rx_data->paddr,
MJUMPAGESIZE, desc_idx);
goto fail;
}
@ -169,7 +170,7 @@ rtwn_pci_rx_frame(struct rtwn_softc *sc, struct r92ce_rx_stat *rx_desc,
__func__, pktlen, infosz, shift, rssi);
/* Update RX descriptor. */
rtwn_pci_setup_rx_desc(pc, rx_desc, rx_data->paddr, MCLBYTES,
rtwn_pci_setup_rx_desc(pc, rx_desc, rx_data->paddr, MJUMPAGESIZE,
desc_idx);
/* Send the frame to the 802.11 layer. */
@ -222,6 +223,8 @@ rtwn_pci_tx_done(struct rtwn_softc *sc, int qid)
data->ni = NULL;
ring->queued--;
KASSERT(ring->queued >= 0,
("ring->queued (qid %d) underflow!\n", qid));
} else
m_freem(data->m);
@ -235,9 +238,27 @@ rtwn_pci_tx_done(struct rtwn_softc *sc, int qid)
#endif
}
if (ring->queued < (RTWN_PCI_TX_LIST_COUNT - 1))
if ((sc->qfullmsk & (1 << qid)) != 0 &&
ring->queued < (RTWN_PCI_TX_LIST_COUNT - 1)) {
sc->qfullmsk &= ~(1 << qid);
rtwn_start(sc);
rtwn_start(sc);
}
#ifdef IEEE80211_SUPPORT_SUPERG
/*
* If the TX active queue drops below a certain
* threshold, ensure we age fast-frames out so they're
* transmitted.
*/
if (sc->sc_ratectl != RTWN_RATECTL_NET80211 && ring->queued <= 1) {
/*
* XXX TODO: just make this a callout timer schedule
* so we can flush the FF staging queue if we're
* approaching idle.
*/
rtwn_cmd_sleepable(sc, NULL, 0, rtwn_ff_flush_all);
}
#endif
}
static void
@ -261,6 +282,17 @@ rtwn_pci_rx_done(struct rtwn_softc *sc)
ring->cur = (ring->cur + 1) % RTWN_PCI_RX_LIST_COUNT;
}
/* Finished receive; age anything left on the FF queue by a little bump */
/*
* XXX TODO: just make this a callout timer schedule so we can
* flush the FF staging queue if we're approaching idle.
*/
#ifdef IEEE80211_SUPPORT_SUPERG
if (!(sc->sc_flags & RTWN_FW_LOADED) ||
sc->sc_ratectl != RTWN_RATECTL_NET80211)
rtwn_cmd_sleepable(sc, NULL, 0, rtwn_ff_flush_all);
#endif
}
void

33
sys/dev/rtwn/pci/rtwn_pci_tx.c
View file

@ -58,6 +58,37 @@ __FBSDID("$FreeBSD$");
#include <dev/rtwn/rtl8192c/pci/r92ce_reg.h>
static struct mbuf *
rtwn_mbuf_defrag(struct mbuf *m0, int how)
{
struct mbuf *m = NULL;
KASSERT(m0->m_flags & M_PKTHDR,
("M_PKTHDR flag is absent (m %p)!", m0));
/* NB: we need _exactly_ one mbuf (no less, no more). */
if (m0->m_pkthdr.len > MJUMPAGESIZE) {
/* XXX MJUM9BYTES? */
return (NULL);
} else if (m0->m_pkthdr.len > MCLBYTES) {
m = m_getjcl(how, MT_DATA, M_PKTHDR, MJUMPAGESIZE);
if (m == NULL)
return (NULL);
if (m_dup_pkthdr(m, m0, how) == 0) {
m_freem(m);
return (NULL);
}
m_copydata(m0, 0, m0->m_pkthdr.len, mtod(m, caddr_t));
m->m_len = m->m_pkthdr.len;
m_freem(m0);
return (m);
} else
return (m_defrag(m0, how));
}
static int
rtwn_pci_tx_start_frame(struct rtwn_softc *sc, struct ieee80211_node *ni,
struct mbuf *m, uint8_t *tx_desc, uint8_t type)
@ -114,7 +145,7 @@ rtwn_pci_tx_start_frame(struct rtwn_softc *sc, struct ieee80211_node *ni,
if (error != 0) {
struct mbuf *mnew;
mnew = m_defrag(m, M_NOWAIT);
mnew = rtwn_mbuf_defrag(m, M_NOWAIT);
if (mnew == NULL) {
device_printf(sc->sc_dev, "can't defragment mbuf\n");
return (ENOBUFS);

14
sys/dev/rtwn/rtl8192c/pci/r92ce_attach.c
View file

@ -138,15 +138,11 @@ r92ce_adj_devcaps(struct rtwn_softc *sc)
{
struct ieee80211com *ic = &sc->sc_ic;
/* XXX TODO: test everything that removed here before enabling. */
/* XX do NOT enable PMGT until RSVD_PAGE command will not be fixed. */
ic->ic_caps &= ~(
IEEE80211_C_PMGT /* check null frame / device usability */
| IEEE80211_C_SWAMSDUTX
| IEEE80211_C_FF
);
ic->ic_htcaps = 0;
/*
* XXX do NOT enable PMGT until RSVD_PAGE command
* will not be tested / fixed + HRPWM register must be set too.
*/
ic->ic_caps &= ~IEEE80211_C_PMGT;
}
void

3
sys/dev/rtwn/usb/rtwn_usb_rx.c
View file

@ -326,7 +326,8 @@ rtwn_bulk_rx_callback(struct usb_xfer *xfer, usb_error_t error)
* flush the FF staging queue if we're approaching idle.
*/
#ifdef IEEE80211_SUPPORT_SUPERG
if (!(sc->sc_flags & RTWN_FW_LOADED))
if (!(sc->sc_flags & RTWN_FW_LOADED) ||
sc->sc_ratectl != RTWN_RATECTL_NET80211)
rtwn_cmd_sleepable(sc, NULL, 0, rtwn_ff_flush_all);
#endif