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Split common TX/RX descriptor DMA tag to TX and RX DMA tags

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respectively and fix all bus_dma(9) issues seen when bounce buffers
are used.
 o Setup frame handling had no bus_dmamap_sync(9) which prevented
   driver from configuring RX filter. Add missing bus_dmamap_sync(9)
   in both dc_setfilt_21143()/dc_setfilt_xircom() and dc_txeof().
 o Use bus_addr_t for DMA segment instead of using u_int32_t.
 o Introduce dc_dma_alloc()/dc_dma_free() functions to allocate/free
   DMA'able memory.
 o Create two DMA descriptor list for each TX/RX lists. This change
   will minimize the size of bounce buffers that would be used in
   each TX/RX path.  Previously driver had to copy both TX/RX lists
   when bounce buffer is active.
 o 21143 data sheet says descriptor list requires 4 bytes alignment.
   Remove PAGE_SIZE alignment restriction and use
   sizeof(struct dc_dec).
 o Setup frame requires 4 bytes alignment.  Remove PAGE_SIZE
   alignment restriction and use sizeof(struct dc_dec).
 o Add missing DMA map unload for both setup frame and TX/RX
   descriptor list.
 o Overhaul RX handling logic such that make driver always allocate
   new RX buffer with dc_newbuf(). Previously driver allowed to
   copy received frame with m_devget(9) after passing the
   descriptor ownership to controller. This can lead to passing
   wrong frame to upper stack.
 o Introduce dc_discard_rxbuf() which will discard received frame
   and reuse loaded DMA map and RX mbuf.
 o Correct several wrong bus_dmamap_sync(9) usage in dc_rxeof and
   dc_txeof. The TX/RX descriptor lists are updated by both driver
   and HW so READ/WRITE semantics should be used.
 o If driver failed to allocate new RX buffer, update if_iqdrops
   counter instead of if_ierrors since driver received the frame
   without errors.
 o Make sure to unload loaded setup frame DMA map in dc_txeof and
   clear the mark of setup frame of the TX descriptor in dc_txeof().
 o Add check for possible TX descriptor overruns in dc_encap() and
   move check for free buffer to caller, dc_start_locked().
 o Swap the loaded DMA map and the last DMA map for multi-segmented
   frames. Since dc_txeof() assumes the last descriptor of the
   frame has the DMA map, driver should swap the first and the last
   DMA map in dc_encap(). Previously driver tried to unload
   not-yet-loaded DMA map such that the loaded DMA map was not
   unloaded at all for multi-segmented frames.
 o Rewrite DC_RXDESC/DC_TXDESC macro to simpler one.
 o Remove definition of ETHER_ALIGN, it's already defined in
   ethernet.h.

With this changes, dc(4) works with bounce buffers and it shall
also fix issues which might have shown in PAE environments.

Tested by:	marius
This commit is contained in:
Pyun YongHyeon 2011-02-19 02:47:10 +00:00
parent a84b4e80ca
commit 5f14ee2363
2 changed files with 427 additions and 274 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

616
sys/dev/dc/if_dc.c
View File

@ -233,7 +233,8 @@ static int dc_detach(device_t);
static int dc_suspend(device_t);
static int dc_resume(device_t);
static const struct dc_type *dc_devtype(device_t);
static int dc_newbuf(struct dc_softc *, int, int);
static void dc_discard_rxbuf(struct dc_softc *, int);
static int dc_newbuf(struct dc_softc *, int);
static int dc_encap(struct dc_softc *, struct mbuf **);
static void dc_pnic_rx_bug_war(struct dc_softc *, int);
static int dc_rx_resync(struct dc_softc *);
@ -253,6 +254,10 @@ static int dc_shutdown(device_t);
static int dc_ifmedia_upd(struct ifnet *);
static void dc_ifmedia_sts(struct ifnet *, struct ifmediareq *);
static int dc_dma_alloc(struct dc_softc *);
static void dc_dma_free(struct dc_softc *);
static void dc_dma_map_addr(void *, bus_dma_segment_t *, int, int);
static void dc_delay(struct dc_softc *);
static void dc_eeprom_idle(struct dc_softc *);
static void dc_eeprom_putbyte(struct dc_softc *, int);
@ -1087,11 +1092,11 @@ dc_setfilt_21143(struct dc_softc *sc)
i = sc->dc_cdata.dc_tx_prod;
DC_INC(sc->dc_cdata.dc_tx_prod, DC_TX_LIST_CNT);
sc->dc_cdata.dc_tx_cnt++;
sframe = &sc->dc_ldata->dc_tx_list[i];
sframe = &sc->dc_ldata.dc_tx_list[i];
sp = sc->dc_cdata.dc_sbuf;
bzero(sp, DC_SFRAME_LEN);
sframe->dc_data = htole32(sc->dc_saddr);
sframe->dc_data = htole32(DC_ADDR_LO(sc->dc_saddr));
sframe->dc_ctl = htole32(DC_SFRAME_LEN | DC_TXCTL_SETUP |
DC_TXCTL_TLINK | DC_FILTER_HASHPERF | DC_TXCTL_FINT);
@ -1130,6 +1135,7 @@ dc_setfilt_21143(struct dc_softc *sc)
sp[41] = DC_SP_MAC(eaddr[2]);
sframe->dc_status = htole32(DC_TXSTAT_OWN);
bus_dmamap_sync(sc->dc_stag, sc->dc_smap, BUS_DMASYNC_PREWRITE);
CSR_WRITE_4(sc, DC_TXSTART, 0xFFFFFFFF);
/*
@ -1290,11 +1296,11 @@ dc_setfilt_xircom(struct dc_softc *sc)
i = sc->dc_cdata.dc_tx_prod;
DC_INC(sc->dc_cdata.dc_tx_prod, DC_TX_LIST_CNT);
sc->dc_cdata.dc_tx_cnt++;
sframe = &sc->dc_ldata->dc_tx_list[i];
sframe = &sc->dc_ldata.dc_tx_list[i];
sp = sc->dc_cdata.dc_sbuf;
bzero(sp, DC_SFRAME_LEN);
sframe->dc_data = htole32(sc->dc_saddr);
sframe->dc_data = htole32(DC_ADDR_LO(sc->dc_saddr));
sframe->dc_ctl = htole32(DC_SFRAME_LEN | DC_TXCTL_SETUP |
DC_TXCTL_TLINK | DC_FILTER_HASHPERF | DC_TXCTL_FINT);
@ -1335,6 +1341,7 @@ dc_setfilt_xircom(struct dc_softc *sc)
DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_TX_ON);
DC_SETBIT(sc, DC_NETCFG, DC_NETCFG_RX_ON);
sframe->dc_status = htole32(DC_TXSTAT_OWN);
bus_dmamap_sync(sc->dc_stag, sc->dc_smap, BUS_DMASYNC_PREWRITE);
CSR_WRITE_4(sc, DC_TXSTART, 0xFFFFFFFF);
/*
@ -1806,7 +1813,7 @@ dc_parse_21143_srom(struct dc_softc *sc)
static void
dc_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
u_int32_t *paddr;
bus_addr_t *paddr;
KASSERT(nseg == 1,
("%s: wrong number of segments (%d)", __func__, nseg));
@ -1814,6 +1821,208 @@ dc_dma_map_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
*paddr = segs->ds_addr;
}
static int
dc_dma_alloc(struct dc_softc *sc)
{
int error, i;
error = bus_dma_tag_create(bus_get_dma_tag(sc->dc_dev), 1, 0,
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
BUS_SPACE_MAXSIZE_32BIT, 0, BUS_SPACE_MAXSIZE_32BIT, 0,
NULL, NULL, &sc->dc_ptag);
if (error) {
device_printf(sc->dc_dev,
"failed to allocate parent DMA tag\n");
goto fail;
}
/* Allocate a busdma tag and DMA safe memory for TX/RX descriptors. */
error = bus_dma_tag_create(sc->dc_ptag, DC_LIST_ALIGN, 0,
BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, DC_RX_LIST_SZ, 1,
DC_RX_LIST_SZ, 0, NULL, NULL, &sc->dc_rx_ltag);
if (error) {
device_printf(sc->dc_dev, "failed to create RX list DMA tag\n");
goto fail;
}
error = bus_dma_tag_create(sc->dc_ptag, DC_LIST_ALIGN, 0,
BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL, DC_TX_LIST_SZ, 1,
DC_TX_LIST_SZ, 0, NULL, NULL, &sc->dc_tx_ltag);
if (error) {
device_printf(sc->dc_dev, "failed to create TX list DMA tag\n");
goto fail;
}
/* RX descriptor list. */
error = bus_dmamem_alloc(sc->dc_rx_ltag,
(void **)&sc->dc_ldata.dc_rx_list, BUS_DMA_NOWAIT |
BUS_DMA_ZERO | BUS_DMA_COHERENT, &sc->dc_rx_lmap);
if (error) {
device_printf(sc->dc_dev,
"failed to allocate DMA'able memory for RX list\n");
goto fail;
}
error = bus_dmamap_load(sc->dc_rx_ltag, sc->dc_rx_lmap,
sc->dc_ldata.dc_rx_list, DC_RX_LIST_SZ, dc_dma_map_addr,
&sc->dc_ldata.dc_rx_list_paddr, BUS_DMA_NOWAIT);
if (error) {
device_printf(sc->dc_dev,
"failed to load DMA'able memory for RX list\n");
goto fail;
}
/* TX descriptor list. */
error = bus_dmamem_alloc(sc->dc_tx_ltag,
(void **)&sc->dc_ldata.dc_tx_list, BUS_DMA_NOWAIT |
BUS_DMA_ZERO | BUS_DMA_COHERENT, &sc->dc_tx_lmap);
if (error) {
device_printf(sc->dc_dev,
"failed to allocate DMA'able memory for TX list\n");
goto fail;
}
error = bus_dmamap_load(sc->dc_tx_ltag, sc->dc_tx_lmap,
sc->dc_ldata.dc_tx_list, DC_TX_LIST_SZ, dc_dma_map_addr,
&sc->dc_ldata.dc_tx_list_paddr, BUS_DMA_NOWAIT);
if (error) {
device_printf(sc->dc_dev,
"cannot load DMA'able memory for TX list\n");
goto fail;
}
/*
* Allocate a busdma tag and DMA safe memory for the multicast
* setup frame.
*/
error = bus_dma_tag_create(sc->dc_ptag, DC_LIST_ALIGN, 0,
BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
DC_SFRAME_LEN + DC_MIN_FRAMELEN, 1, DC_SFRAME_LEN + DC_MIN_FRAMELEN,
0, NULL, NULL, &sc->dc_stag);
if (error) {
device_printf(sc->dc_dev,
"failed to create DMA tag for setup frame\n");
goto fail;
}
error = bus_dmamem_alloc(sc->dc_stag, (void **)&sc->dc_cdata.dc_sbuf,
BUS_DMA_NOWAIT, &sc->dc_smap);
if (error) {
device_printf(sc->dc_dev,
"failed to allocate DMA'able memory for setup frame\n");
goto fail;
}
error = bus_dmamap_load(sc->dc_stag, sc->dc_smap, sc->dc_cdata.dc_sbuf,
DC_SFRAME_LEN, dc_dma_map_addr, &sc->dc_saddr, BUS_DMA_NOWAIT);
if (error) {
device_printf(sc->dc_dev,
"cannot load DMA'able memory for setup frame\n");
goto fail;
}
/* Allocate a busdma tag for RX mbufs. */
error = bus_dma_tag_create(sc->dc_ptag, DC_RXBUF_ALIGN, 0,
BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
MCLBYTES, 1, MCLBYTES, 0, NULL, NULL, &sc->dc_rx_mtag);
if (error) {
device_printf(sc->dc_dev, "failed to create RX mbuf tag\n");
goto fail;
}
/* Allocate a busdma tag for TX mbufs. */
error = bus_dma_tag_create(sc->dc_ptag, 1, 0,
BUS_SPACE_MAXADDR, BUS_SPACE_MAXADDR, NULL, NULL,
MCLBYTES * DC_MAXFRAGS, DC_MAXFRAGS, MCLBYTES,
0, NULL, NULL, &sc->dc_tx_mtag);
if (error) {
device_printf(sc->dc_dev, "failed to create TX mbuf tag\n");
goto fail;
}
/* Create the TX/RX busdma maps. */
for (i = 0; i < DC_TX_LIST_CNT; i++) {
error = bus_dmamap_create(sc->dc_tx_mtag, 0,
&sc->dc_cdata.dc_tx_map[i]);
if (error) {
device_printf(sc->dc_dev,
"failed to create TX mbuf dmamap\n");
goto fail;
}
}
for (i = 0; i < DC_RX_LIST_CNT; i++) {
error = bus_dmamap_create(sc->dc_rx_mtag, 0,
&sc->dc_cdata.dc_rx_map[i]);
if (error) {
device_printf(sc->dc_dev,
"failed to create RX mbuf dmamap\n");
goto fail;
}
}
error = bus_dmamap_create(sc->dc_rx_mtag, 0, &sc->dc_sparemap);
if (error) {
device_printf(sc->dc_dev,
"failed to create spare RX mbuf dmamap\n");
goto fail;
}
fail:
return (error);
}
static void
dc_dma_free(struct dc_softc *sc)
{
int i;
/* RX buffers. */
if (sc->dc_rx_mtag != NULL) {
for (i = 0; i < DC_RX_LIST_CNT; i++) {
if (sc->dc_cdata.dc_rx_map[i] != NULL)
bus_dmamap_destroy(sc->dc_rx_mtag,
sc->dc_cdata.dc_rx_map[i]);
}
if (sc->dc_sparemap != NULL)
bus_dmamap_destroy(sc->dc_rx_mtag, sc->dc_sparemap);
bus_dma_tag_destroy(sc->dc_rx_mtag);
}
/* TX buffers. */
if (sc->dc_rx_mtag != NULL) {
for (i = 0; i < DC_TX_LIST_CNT; i++) {
if (sc->dc_cdata.dc_tx_map[i] != NULL)
bus_dmamap_destroy(sc->dc_tx_mtag,
sc->dc_cdata.dc_tx_map[i]);
}
bus_dma_tag_destroy(sc->dc_tx_mtag);
}
/* RX descriptor list. */
if (sc->dc_rx_ltag) {
if (sc->dc_rx_lmap != NULL)
bus_dmamap_unload(sc->dc_rx_ltag, sc->dc_rx_lmap);
if (sc->dc_rx_lmap != NULL && sc->dc_ldata.dc_rx_list != NULL)
bus_dmamem_free(sc->dc_rx_ltag, sc->dc_ldata.dc_rx_list,
sc->dc_rx_lmap);
bus_dma_tag_destroy(sc->dc_rx_ltag);
}
/* TX descriptor list. */
if (sc->dc_tx_ltag) {
if (sc->dc_tx_lmap != NULL)
bus_dmamap_unload(sc->dc_tx_ltag, sc->dc_tx_lmap);
if (sc->dc_tx_lmap != NULL && sc->dc_ldata.dc_tx_list != NULL)
bus_dmamem_free(sc->dc_tx_ltag, sc->dc_ldata.dc_tx_list,
sc->dc_tx_lmap);
bus_dma_tag_destroy(sc->dc_tx_ltag);
}
/* multicast setup frame. */
if (sc->dc_stag) {
if (sc->dc_smap != NULL)
bus_dmamap_unload(sc->dc_stag, sc->dc_smap);
if (sc->dc_smap != NULL && sc->dc_cdata.dc_sbuf != NULL)
bus_dmamem_free(sc->dc_stag, sc->dc_cdata.dc_sbuf,
sc->dc_smap);
bus_dma_tag_destroy(sc->dc_stag);
}
}
/*
* Attach the interface. Allocate softc structures, do ifmedia
* setup and ethernet/BPF attach.
@ -1827,7 +2036,7 @@ dc_attach(device_t dev)
struct ifnet *ifp;
struct dc_mediainfo *m;
u_int32_t reg, revision;
int error, i, mac_offset, phy, rid, tmp;
int error, mac_offset, phy, rid, tmp;
u_int8_t *mac;
sc = device_get_softc(dev);
@ -2139,96 +2348,8 @@ dc_attach(device_t dev)
error = 0;
}
/* Allocate a busdma tag and DMA safe memory for TX/RX descriptors. */
error = bus_dma_tag_create(bus_get_dma_tag(dev), PAGE_SIZE, 0,
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
sizeof(struct dc_list_data), 1, sizeof(struct dc_list_data),
0, NULL, NULL, &sc->dc_ltag);
if (error) {
device_printf(dev, "failed to allocate busdma tag\n");
error = ENXIO;
if ((error = dc_dma_alloc(sc)) != 0)
goto fail;
}
error = bus_dmamem_alloc(sc->dc_ltag, (void **)&sc->dc_ldata,
BUS_DMA_NOWAIT | BUS_DMA_ZERO, &sc->dc_lmap);
if (error) {
device_printf(dev, "failed to allocate DMA safe memory\n");
error = ENXIO;
goto fail;
}
error = bus_dmamap_load(sc->dc_ltag, sc->dc_lmap, sc->dc_ldata,
sizeof(struct dc_list_data), dc_dma_map_addr, &sc->dc_laddr,
BUS_DMA_NOWAIT);
if (error) {
device_printf(dev, "cannot get address of the descriptors\n");
error = ENXIO;
goto fail;
}
/*
* Allocate a busdma tag and DMA safe memory for the multicast
* setup frame.
*/
error = bus_dma_tag_create(bus_get_dma_tag(dev), PAGE_SIZE, 0,
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
DC_SFRAME_LEN + DC_MIN_FRAMELEN, 1, DC_SFRAME_LEN + DC_MIN_FRAMELEN,
0, NULL, NULL, &sc->dc_stag);
if (error) {
device_printf(dev, "failed to allocate busdma tag\n");
error = ENXIO;
goto fail;
}
error = bus_dmamem_alloc(sc->dc_stag, (void **)&sc->dc_cdata.dc_sbuf,
BUS_DMA_NOWAIT, &sc->dc_smap);
if (error) {
device_printf(dev, "failed to allocate DMA safe memory\n");
error = ENXIO;
goto fail;
}
error = bus_dmamap_load(sc->dc_stag, sc->dc_smap, sc->dc_cdata.dc_sbuf,
DC_SFRAME_LEN, dc_dma_map_addr, &sc->dc_saddr, BUS_DMA_NOWAIT);
if (error) {
device_printf(dev, "cannot get address of the descriptors\n");
error = ENXIO;
goto fail;
}
/* Allocate a busdma tag for mbufs. */
error = bus_dma_tag_create(bus_get_dma_tag(dev), 1, 0,
BUS_SPACE_MAXADDR_32BIT, BUS_SPACE_MAXADDR, NULL, NULL,
MCLBYTES * DC_MAXFRAGS, DC_MAXFRAGS, MCLBYTES,
0, NULL, NULL, &sc->dc_mtag);
if (error) {
device_printf(dev, "failed to allocate busdma tag\n");
error = ENXIO;
goto fail;
}
/* Create the TX/RX busdma maps. */
for (i = 0; i < DC_TX_LIST_CNT; i++) {
error = bus_dmamap_create(sc->dc_mtag, 0,
&sc->dc_cdata.dc_tx_map[i]);
if (error) {
device_printf(dev, "failed to init TX ring\n");
error = ENXIO;
goto fail;
}
}
for (i = 0; i < DC_RX_LIST_CNT; i++) {
error = bus_dmamap_create(sc->dc_mtag, 0,
&sc->dc_cdata.dc_rx_map[i]);
if (error) {
device_printf(dev, "failed to init RX ring\n");
error = ENXIO;
goto fail;
}
}
error = bus_dmamap_create(sc->dc_mtag, 0, &sc->dc_sparemap);
if (error) {
device_printf(dev, "failed to init RX ring\n");
error = ENXIO;
goto fail;
}
ifp = sc->dc_ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) {
@ -2377,7 +2498,6 @@ dc_detach(device_t dev)
struct dc_softc *sc;
struct ifnet *ifp;
struct dc_mediainfo *m;
int i;
sc = device_get_softc(dev);
KASSERT(mtx_initialized(&sc->dc_mtx), ("dc mutex not initialized"));
@ -2412,27 +2532,7 @@ dc_detach(device_t dev)
if (ifp)
if_free(ifp);
if (sc->dc_cdata.dc_sbuf != NULL)
bus_dmamem_free(sc->dc_stag, sc->dc_cdata.dc_sbuf, sc->dc_smap);
if (sc->dc_ldata != NULL)
bus_dmamem_free(sc->dc_ltag, sc->dc_ldata, sc->dc_lmap);
if (sc->dc_mtag) {
for (i = 0; i < DC_TX_LIST_CNT; i++)
if (sc->dc_cdata.dc_tx_map[i] != NULL)
bus_dmamap_destroy(sc->dc_mtag,
sc->dc_cdata.dc_tx_map[i]);
for (i = 0; i < DC_RX_LIST_CNT; i++)
if (sc->dc_cdata.dc_rx_map[i] != NULL)
bus_dmamap_destroy(sc->dc_mtag,
sc->dc_cdata.dc_rx_map[i]);
bus_dmamap_destroy(sc->dc_mtag, sc->dc_sparemap);
}
if (sc->dc_stag)
bus_dma_tag_destroy(sc->dc_stag);
if (sc->dc_mtag)
bus_dma_tag_destroy(sc->dc_mtag);
if (sc->dc_ltag)
bus_dma_tag_destroy(sc->dc_ltag);
dc_dma_free(sc);
free(sc->dc_pnic_rx_buf, M_DEVBUF);
@ -2459,7 +2559,7 @@ dc_list_tx_init(struct dc_softc *sc)
int i, nexti;
cd = &sc->dc_cdata;
ld = sc->dc_ldata;
ld = &sc->dc_ldata;
for (i = 0; i < DC_TX_LIST_CNT; i++) {
if (i == DC_TX_LIST_CNT - 1)
nexti = 0;
@ -2474,7 +2574,7 @@ dc_list_tx_init(struct dc_softc *sc)
cd->dc_tx_prod = cd->dc_tx_cons = cd->dc_tx_cnt = 0;
cd->dc_tx_pkts = 0;
bus_dmamap_sync(sc->dc_ltag, sc->dc_lmap,
bus_dmamap_sync(sc->dc_tx_ltag, sc->dc_tx_lmap,
BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
return (0);
}
@ -2493,10 +2593,10 @@ dc_list_rx_init(struct dc_softc *sc)
int i, nexti;
cd = &sc->dc_cdata;
ld = sc->dc_ldata;
ld = &sc->dc_ldata;
for (i = 0; i < DC_RX_LIST_CNT; i++) {
if (dc_newbuf(sc, i, 1) != 0)
if (dc_newbuf(sc, i) != 0)
return (ENOBUFS);
if (i == DC_RX_LIST_CNT - 1)
nexti = 0;
@ -2506,7 +2606,7 @@ dc_list_rx_init(struct dc_softc *sc)
}
cd->dc_rx_prod = 0;
bus_dmamap_sync(sc->dc_ltag, sc->dc_lmap,
bus_dmamap_sync(sc->dc_rx_ltag, sc->dc_rx_lmap,
BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
return (0);
}
@ -2515,23 +2615,18 @@ dc_list_rx_init(struct dc_softc *sc)
* Initialize an RX descriptor and attach an MBUF cluster.
*/
static int
dc_newbuf(struct dc_softc *sc, int i, int alloc)
dc_newbuf(struct dc_softc *sc, int i)
{
struct mbuf *m_new;
bus_dmamap_t tmp;
struct mbuf *m;
bus_dmamap_t map;
bus_dma_segment_t segs[1];
int error, nseg;
if (alloc) {
m_new = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
if (m_new == NULL)
m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
if (m == NULL)
return (ENOBUFS);
} else {
m_new = sc->dc_cdata.dc_rx_chain[i];
m_new->m_data = m_new->m_ext.ext_buf;
}
m_new->m_len = m_new->m_pkthdr.len = MCLBYTES;
m_adj(m_new, sizeof(u_int64_t));
m->m_len = m->m_pkthdr.len = MCLBYTES;
m_adj(m, sizeof(u_int64_t));
/*
* If this is a PNIC chip, zero the buffer. This is part
@ -2539,31 +2634,31 @@ dc_newbuf(struct dc_softc *sc, int i, int alloc)
* 82c169 chips.
*/
if (sc->dc_flags & DC_PNIC_RX_BUG_WAR)
bzero(mtod(m_new, char *), m_new->m_len);
bzero(mtod(m, char *), m->m_len);
/* No need to remap the mbuf if we're reusing it. */
if (alloc) {
error = bus_dmamap_load_mbuf_sg(sc->dc_mtag, sc->dc_sparemap,
m_new, segs, &nseg, 0);
error = bus_dmamap_load_mbuf_sg(sc->dc_rx_mtag, sc->dc_sparemap,
m, segs, &nseg, 0);
if (error) {
m_freem(m_new);
m_freem(m);
return (error);
}
KASSERT(nseg == 1,
("%s: wrong number of segments (%d)", __func__, nseg));
sc->dc_ldata->dc_rx_list[i].dc_data = htole32(segs->ds_addr);
bus_dmamap_unload(sc->dc_mtag, sc->dc_cdata.dc_rx_map[i]);
tmp = sc->dc_cdata.dc_rx_map[i];
sc->dc_cdata.dc_rx_map[i] = sc->dc_sparemap;
sc->dc_sparemap = tmp;
sc->dc_cdata.dc_rx_chain[i] = m_new;
}
KASSERT(nseg == 1, ("%s: wrong number of segments (%d)", __func__,
nseg));
if (sc->dc_cdata.dc_rx_chain[i] != NULL)
bus_dmamap_unload(sc->dc_rx_mtag, sc->dc_cdata.dc_rx_map[i]);
sc->dc_ldata->dc_rx_list[i].dc_ctl = htole32(DC_RXCTL_RLINK | DC_RXLEN);
sc->dc_ldata->dc_rx_list[i].dc_status = htole32(DC_RXSTAT_OWN);
bus_dmamap_sync(sc->dc_mtag, sc->dc_cdata.dc_rx_map[i],
map = sc->dc_cdata.dc_rx_map[i];
sc->dc_cdata.dc_rx_map[i] = sc->dc_sparemap;
sc->dc_sparemap = map;
sc->dc_cdata.dc_rx_chain[i] = m;
bus_dmamap_sync(sc->dc_rx_mtag, sc->dc_cdata.dc_rx_map[i],
BUS_DMASYNC_PREREAD);
bus_dmamap_sync(sc->dc_ltag, sc->dc_lmap,
sc->dc_ldata.dc_rx_list[i].dc_ctl = htole32(DC_RXCTL_RLINK | DC_RXLEN);
sc->dc_ldata.dc_rx_list[i].dc_data =
htole32(DC_ADDR_LO(segs[0].ds_addr));
sc->dc_ldata.dc_rx_list[i].dc_status = htole32(DC_RXSTAT_OWN);
bus_dmamap_sync(sc->dc_rx_ltag, sc->dc_rx_lmap,
BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
return (0);
}
@ -2632,13 +2727,13 @@ dc_pnic_rx_bug_war(struct dc_softc *sc, int idx)
u_int32_t rxstat = 0;
i = sc->dc_pnic_rx_bug_save;
cur_rx = &sc->dc_ldata->dc_rx_list[idx];
cur_rx = &sc->dc_ldata.dc_rx_list[idx];
ptr = sc->dc_pnic_rx_buf;
bzero(ptr, DC_RXLEN * 5);
/* Copy all the bytes from the bogus buffers. */
while (1) {
c = &sc->dc_ldata->dc_rx_list[i];
c = &sc->dc_ldata.dc_rx_list[i];
rxstat = le32toh(c->dc_status);
m = sc->dc_cdata.dc_rx_chain[i];
bcopy(mtod(m, char *), ptr, DC_RXLEN);
@ -2646,7 +2741,7 @@ dc_pnic_rx_bug_war(struct dc_softc *sc, int idx)
/* If this is the last buffer, break out. */
if (i == idx || rxstat & DC_RXSTAT_LASTFRAG)
break;
dc_newbuf(sc, i, 0);
dc_discard_rxbuf(sc, i);
DC_INC(i, DC_RX_LIST_CNT);
}
@ -2695,7 +2790,9 @@ dc_rx_resync(struct dc_softc *sc)
pos = sc->dc_cdata.dc_rx_prod;
for (i = 0; i < DC_RX_LIST_CNT; i++) {
cur_rx = &sc->dc_ldata->dc_rx_list[pos];
bus_dmamap_sync(sc->dc_rx_ltag, sc->dc_rx_lmap,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
cur_rx = &sc->dc_ldata.dc_rx_list[pos];
if (!(le32toh(cur_rx->dc_status) & DC_RXSTAT_OWN))
break;
DC_INC(pos, DC_RX_LIST_CNT);
@ -2711,6 +2808,22 @@ dc_rx_resync(struct dc_softc *sc)
return (EAGAIN);
}
static void
dc_discard_rxbuf(struct dc_softc *sc, int i)
{
struct mbuf *m;
if (sc->dc_flags & DC_PNIC_RX_BUG_WAR) {
m = sc->dc_cdata.dc_rx_chain[i];
bzero(mtod(m, char *), m->m_len);
}
sc->dc_ldata.dc_rx_list[i].dc_ctl = htole32(DC_RXCTL_RLINK | DC_RXLEN);
sc->dc_ldata.dc_rx_list[i].dc_status = htole32(DC_RXSTAT_OWN);
bus_dmamap_sync(sc->dc_rx_ltag, sc->dc_rx_lmap, BUS_DMASYNC_PREREAD |
BUS_DMASYNC_PREWRITE);
}
/*
* A frame has been uploaded: pass the resulting mbuf chain up to
* the higher level protocols.
@ -2718,7 +2831,7 @@ dc_rx_resync(struct dc_softc *sc)
static int
dc_rxeof(struct dc_softc *sc)
{
struct mbuf *m, *m0;
struct mbuf *m;
struct ifnet *ifp;
struct dc_desc *cur_rx;
int i, total_len, rx_npkts;
@ -2727,13 +2840,13 @@ dc_rxeof(struct dc_softc *sc)
DC_LOCK_ASSERT(sc);
ifp = sc->dc_ifp;
i = sc->dc_cdata.dc_rx_prod;
total_len = 0;
rx_npkts = 0;
bus_dmamap_sync(sc->dc_ltag, sc->dc_lmap, BUS_DMASYNC_POSTREAD);
while (!(le32toh(sc->dc_ldata->dc_rx_list[i].dc_status) &
DC_RXSTAT_OWN)) {
bus_dmamap_sync(sc->dc_rx_ltag, sc->dc_rx_lmap, BUS_DMASYNC_POSTREAD |
BUS_DMASYNC_POSTWRITE);
for (i = sc->dc_cdata.dc_rx_prod;
(ifp->if_drv_flags & IFF_DRV_RUNNING) != 0;
DC_INC(i, DC_RX_LIST_CNT)) {
#ifdef DEVICE_POLLING
if (ifp->if_capenable & IFCAP_POLLING) {
if (sc->rxcycles <= 0)
@ -2741,10 +2854,12 @@ dc_rxeof(struct dc_softc *sc)
sc->rxcycles--;
}
#endif
cur_rx = &sc->dc_ldata->dc_rx_list[i];
cur_rx = &sc->dc_ldata.dc_rx_list[i];
rxstat = le32toh(cur_rx->dc_status);
if ((rxstat & DC_RXSTAT_OWN) != 0)
break;
m = sc->dc_cdata.dc_rx_chain[i];
bus_dmamap_sync(sc->dc_mtag, sc->dc_cdata.dc_rx_map[i],
bus_dmamap_sync(sc->dc_rx_mtag, sc->dc_cdata.dc_rx_map[i],
BUS_DMASYNC_POSTREAD);
total_len = DC_RXBYTES(rxstat);
@ -2752,10 +2867,8 @@ dc_rxeof(struct dc_softc *sc)
if ((rxstat & DC_WHOLEFRAME) != DC_WHOLEFRAME) {
if (rxstat & DC_RXSTAT_FIRSTFRAG)
sc->dc_pnic_rx_bug_save = i;
if ((rxstat & DC_RXSTAT_LASTFRAG) == 0) {
DC_INC(i, DC_RX_LIST_CNT);
if ((rxstat & DC_RXSTAT_LASTFRAG) == 0)
continue;
}
dc_pnic_rx_bug_war(sc, i);
rxstat = le32toh(cur_rx->dc_status);
total_len = DC_RXBYTES(rxstat);
@ -2777,11 +2890,10 @@ dc_rxeof(struct dc_softc *sc)
ifp->if_ierrors++;
if (rxstat & DC_RXSTAT_COLLSEEN)
ifp->if_collisions++;
dc_newbuf(sc, i, 0);
if (rxstat & DC_RXSTAT_CRCERR) {
DC_INC(i, DC_RX_LIST_CNT);
dc_discard_rxbuf(sc, i);
if (rxstat & DC_RXSTAT_CRCERR)
continue;
} else {
else {
dc_init_locked(sc);
return (rx_npkts);
}
@ -2800,23 +2912,27 @@ dc_rxeof(struct dc_softc *sc)
* if the allocation fails, then use m_devget and leave the
* existing buffer in the receive ring.
*/
if (dc_newbuf(sc, i, 1) == 0) {
if (dc_newbuf(sc, i) != 0) {
dc_discard_rxbuf(sc, i);
ifp->if_iqdrops++;
continue;
}
m->m_pkthdr.rcvif = ifp;
m->m_pkthdr.len = m->m_len = total_len;
DC_INC(i, DC_RX_LIST_CNT);
} else
#endif
#else
{
struct mbuf *m0;
m0 = m_devget(mtod(m, char *), total_len,
ETHER_ALIGN, ifp, NULL);
dc_newbuf(sc, i, 0);
DC_INC(i, DC_RX_LIST_CNT);
dc_discard_rxbuf(sc, i);
if (m0 == NULL) {
ifp->if_ierrors++;
ifp->if_iqdrops++;
continue;
}
m = m0;
}
#endif
ifp->if_ipackets++;
DC_UNLOCK(sc);
@ -2836,9 +2952,9 @@ dc_rxeof(struct dc_softc *sc)
static void
dc_txeof(struct dc_softc *sc)
{
struct dc_desc *cur_tx = NULL;
struct dc_desc *cur_tx;
struct ifnet *ifp;
int idx;
int idx, setup;
u_int32_t ctl, txstat;
if (sc->dc_cdata.dc_tx_cnt == 0)
@ -2850,19 +2966,26 @@ dc_txeof(struct dc_softc *sc)
* Go through our tx list and free mbufs for those
* frames that have been transmitted.
*/
bus_dmamap_sync(sc->dc_ltag, sc->dc_lmap, BUS_DMASYNC_POSTREAD);
idx = sc->dc_cdata.dc_tx_cons;
while (idx != sc->dc_cdata.dc_tx_prod) {
cur_tx = &sc->dc_ldata->dc_tx_list[idx];
bus_dmamap_sync(sc->dc_rx_ltag, sc->dc_tx_lmap, BUS_DMASYNC_POSTREAD |
BUS_DMASYNC_POSTWRITE);
setup = 0;
for (idx = sc->dc_cdata.dc_tx_cons; idx != sc->dc_cdata.dc_tx_prod;
DC_INC(idx, DC_TX_LIST_CNT), sc->dc_cdata.dc_tx_cnt--) {
cur_tx = &sc->dc_ldata.dc_tx_list[idx];
txstat = le32toh(cur_tx->dc_status);
ctl = le32toh(cur_tx->dc_ctl);
if (txstat & DC_TXSTAT_OWN)
break;
if (!(ctl & DC_TXCTL_LASTFRAG) || ctl & DC_TXCTL_SETUP) {
if (sc->dc_cdata.dc_tx_chain[idx] == NULL)
continue;
if (ctl & DC_TXCTL_SETUP) {
cur_tx->dc_ctl = htole32(ctl & ~DC_TXCTL_SETUP);
setup++;
bus_dmamap_sync(sc->dc_stag, sc->dc_smap,
BUS_DMASYNC_POSTWRITE);
/*
* Yes, the PNIC is so brain damaged
* that it will sometimes generate a TX
@ -2877,9 +3000,6 @@ dc_txeof(struct dc_softc *sc)
dc_setfilt(sc);
}
sc->dc_cdata.dc_tx_chain[idx] = NULL;
}
sc->dc_cdata.dc_tx_cnt--;
DC_INC(idx, DC_TX_LIST_CNT);
continue;
}
@ -2919,27 +3039,23 @@ dc_txeof(struct dc_softc *sc)
ifp->if_opackets++;
ifp->if_collisions += (txstat & DC_TXSTAT_COLLCNT) >> 3;
if (sc->dc_cdata.dc_tx_chain[idx] != NULL) {
bus_dmamap_sync(sc->dc_mtag,
sc->dc_cdata.dc_tx_map[idx],
bus_dmamap_sync(sc->dc_tx_mtag, sc->dc_cdata.dc_tx_map[idx],
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->dc_mtag,
sc->dc_cdata.dc_tx_map[idx]);
bus_dmamap_unload(sc->dc_tx_mtag, sc->dc_cdata.dc_tx_map[idx]);
m_freem(sc->dc_cdata.dc_tx_chain[idx]);
sc->dc_cdata.dc_tx_chain[idx] = NULL;
}
sc->dc_cdata.dc_tx_cnt--;
DC_INC(idx, DC_TX_LIST_CNT);
}
sc->dc_cdata.dc_tx_cons = idx;
if (DC_TX_LIST_CNT - sc->dc_cdata.dc_tx_cnt > DC_TX_LIST_RSVD)
if (sc->dc_cdata.dc_tx_cnt <= DC_TX_LIST_CNT - DC_TX_LIST_RSVD) {
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
if (sc->dc_cdata.dc_tx_cnt == 0)
sc->dc_wdog_timer = 0;
}
if (setup > 0)
bus_dmamap_sync(sc->dc_tx_ltag, sc->dc_tx_lmap,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
}
static void
dc_tick(void *xsc)
@ -3226,16 +3342,11 @@ static int
dc_encap(struct dc_softc *sc, struct mbuf **m_head)
{
bus_dma_segment_t segs[DC_MAXFRAGS];
bus_dmamap_t map;
struct dc_desc *f;
struct mbuf *m;
int cur, defragged, error, first, frag, i, idx, nseg;
/*
* If there's no way we can send any packets, return now.
*/
if (DC_TX_LIST_CNT - sc->dc_cdata.dc_tx_cnt <= DC_TX_LIST_RSVD)
return (ENOBUFS);
m = NULL;
defragged = 0;
if (sc->dc_flags & DC_TX_COALESCE &&
@ -3269,7 +3380,7 @@ dc_encap(struct dc_softc *sc, struct mbuf **m_head)
}
idx = sc->dc_cdata.dc_tx_prod;
error = bus_dmamap_load_mbuf_sg(sc->dc_mtag,
error = bus_dmamap_load_mbuf_sg(sc->dc_tx_mtag,
sc->dc_cdata.dc_tx_map[idx], *m_head, segs, &nseg, 0);
if (error == EFBIG) {
if (defragged != 0 || (m = m_collapse(*m_head, M_DONTWAIT,
@ -3279,7 +3390,7 @@ dc_encap(struct dc_softc *sc, struct mbuf **m_head)
return (defragged != 0 ? error : ENOBUFS);
}
*m_head = m;
error = bus_dmamap_load_mbuf_sg(sc->dc_mtag,
error = bus_dmamap_load_mbuf_sg(sc->dc_tx_mtag,
sc->dc_cdata.dc_tx_map[idx], *m_head, segs, &nseg, 0);
if (error != 0) {
m_freem(*m_head);
@ -3296,26 +3407,34 @@ dc_encap(struct dc_softc *sc, struct mbuf **m_head)
return (EIO);
}
/* Check descriptor overruns. */
if (sc->dc_cdata.dc_tx_cnt + nseg > DC_TX_LIST_CNT - DC_TX_LIST_RSVD) {
bus_dmamap_unload(sc->dc_tx_mtag, sc->dc_cdata.dc_tx_map[idx]);
return (ENOBUFS);
}
bus_dmamap_sync(sc->dc_tx_mtag, sc->dc_cdata.dc_tx_map[idx],
BUS_DMASYNC_PREWRITE);
first = cur = frag = sc->dc_cdata.dc_tx_prod;
for (i = 0; i < nseg; i++) {
if ((sc->dc_flags & DC_TX_ADMTEK_WAR) &&
(frag == (DC_TX_LIST_CNT - 1)) &&
(first != sc->dc_cdata.dc_tx_first)) {
bus_dmamap_unload(sc->dc_mtag,
bus_dmamap_unload(sc->dc_tx_mtag,
sc->dc_cdata.dc_tx_map[first]);
m_freem(*m_head);
*m_head = NULL;
return (ENOBUFS);
}
f = &sc->dc_ldata->dc_tx_list[frag];
f = &sc->dc_ldata.dc_tx_list[frag];
f->dc_ctl = htole32(DC_TXCTL_TLINK | segs[i].ds_len);
if (i == 0) {
f->dc_status = 0;
f->dc_ctl |= htole32(DC_TXCTL_FIRSTFRAG);
} else
f->dc_status = htole32(DC_TXSTAT_OWN);
f->dc_data = htole32(segs[i].ds_addr);
f->dc_data = htole32(DC_ADDR_LO(segs[i].ds_addr));
cur = frag;
DC_INC(frag, DC_TX_LIST_CNT);
}
@ -3323,23 +3442,30 @@ dc_encap(struct dc_softc *sc, struct mbuf **m_head)
sc->dc_cdata.dc_tx_prod = frag;
sc->dc_cdata.dc_tx_cnt += nseg;
sc->dc_cdata.dc_tx_chain[cur] = *m_head;
sc->dc_ldata->dc_tx_list[cur].dc_ctl |= htole32(DC_TXCTL_LASTFRAG);
sc->dc_ldata.dc_tx_list[cur].dc_ctl |= htole32(DC_TXCTL_LASTFRAG);
if (sc->dc_flags & DC_TX_INTR_FIRSTFRAG)
sc->dc_ldata->dc_tx_list[first].dc_ctl |=
sc->dc_ldata.dc_tx_list[first].dc_ctl |=
htole32(DC_TXCTL_FINT);
if (sc->dc_flags & DC_TX_INTR_ALWAYS)
sc->dc_ldata->dc_tx_list[cur].dc_ctl |= htole32(DC_TXCTL_FINT);
sc->dc_ldata.dc_tx_list[cur].dc_ctl |= htole32(DC_TXCTL_FINT);
if (sc->dc_flags & DC_TX_USE_TX_INTR &&
++sc->dc_cdata.dc_tx_pkts >= 8) {
sc->dc_cdata.dc_tx_pkts = 0;
sc->dc_ldata->dc_tx_list[cur].dc_ctl |= htole32(DC_TXCTL_FINT);
sc->dc_ldata.dc_tx_list[cur].dc_ctl |= htole32(DC_TXCTL_FINT);
}
sc->dc_ldata->dc_tx_list[first].dc_status = htole32(DC_TXSTAT_OWN);
sc->dc_ldata.dc_tx_list[first].dc_status = htole32(DC_TXSTAT_OWN);
bus_dmamap_sync(sc->dc_tx_ltag, sc->dc_tx_lmap,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/*
* Swap the last and the first dmamaps to ensure the map for
* this transmission is placed at the last descriptor.
*/
map = sc->dc_cdata.dc_tx_map[cur];
sc->dc_cdata.dc_tx_map[cur] = sc->dc_cdata.dc_tx_map[first];
sc->dc_cdata.dc_tx_map[first] = map;
bus_dmamap_sync(sc->dc_mtag, sc->dc_cdata.dc_tx_map[idx],
BUS_DMASYNC_PREWRITE);
bus_dmamap_sync(sc->dc_ltag, sc->dc_lmap,
BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
return (0);
}
@ -3365,9 +3491,8 @@ static void
dc_start_locked(struct ifnet *ifp)
{
struct dc_softc *sc;
struct mbuf *m_head = NULL;
unsigned int queued = 0;
int idx;
struct mbuf *m_head;
int queued;
sc = ifp->if_softc;
@ -3377,9 +3502,16 @@ dc_start_locked(struct ifnet *ifp)
IFF_DRV_RUNNING || sc->dc_link == 0)
return;
idx = sc->dc_cdata.dc_tx_first = sc->dc_cdata.dc_tx_prod;
sc->dc_cdata.dc_tx_first = sc->dc_cdata.dc_tx_prod;
while (sc->dc_cdata.dc_tx_chain[idx] == NULL) {
for (queued = 0; !IFQ_DRV_IS_EMPTY(&ifp->if_snd); ) {
/*
* If there's no way we can send any packets, return now.
*/
if (sc->dc_cdata.dc_tx_cnt > DC_TX_LIST_CNT - DC_TX_LIST_RSVD) {
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
break;
}
IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL)
break;
@ -3391,7 +3523,6 @@ dc_start_locked(struct ifnet *ifp)
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
break;
}
idx = sc->dc_cdata.dc_tx_prod;
queued++;
/*
@ -3778,7 +3909,7 @@ dc_stop(struct dc_softc *sc)
DC_LOCK_ASSERT(sc);
ifp = sc->dc_ifp;
ld = sc->dc_ldata;
ld = &sc->dc_ldata;
cd = &sc->dc_cdata;
callout_stop(&sc->dc_stat_ch);
@ -3798,11 +3929,17 @@ dc_stop(struct dc_softc *sc)
*/
for (i = 0; i < DC_RX_LIST_CNT; i++) {
if (cd->dc_rx_chain[i] != NULL) {
bus_dmamap_sync(sc->dc_rx_mtag,
cd->dc_rx_map[i], BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(sc->dc_rx_mtag,
cd->dc_rx_map[i]);
m_freem(cd->dc_rx_chain[i]);
cd->dc_rx_chain[i] = NULL;
}
}
bzero(&ld->dc_rx_list, sizeof(ld->dc_rx_list));
bzero(ld->dc_rx_list, DC_RX_LIST_SZ);
bus_dmamap_sync(sc->dc_rx_ltag, sc->dc_rx_lmap,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/*
* Free the TX list buffers.
@ -3810,17 +3947,22 @@ dc_stop(struct dc_softc *sc)
for (i = 0; i < DC_TX_LIST_CNT; i++) {
if (cd->dc_tx_chain[i] != NULL) {
ctl = le32toh(ld->dc_tx_list[i].dc_ctl);
if ((ctl & DC_TXCTL_SETUP) ||
!(ctl & DC_TXCTL_LASTFRAG)) {
cd->dc_tx_chain[i] = NULL;
continue;
}
bus_dmamap_unload(sc->dc_mtag, cd->dc_tx_map[i]);
if (ctl & DC_TXCTL_SETUP) {
bus_dmamap_sync(sc->dc_stag, sc->dc_smap,
BUS_DMASYNC_POSTWRITE);
} else {
bus_dmamap_sync(sc->dc_tx_mtag,
cd->dc_tx_map[i], BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->dc_tx_mtag,
cd->dc_tx_map[i]);
m_freem(cd->dc_tx_chain[i]);
}
cd->dc_tx_chain[i] = NULL;
}
}
bzero(&ld->dc_tx_list, sizeof(ld->dc_tx_list));
bzero(ld->dc_tx_list, DC_TX_LIST_SZ);
bus_dmamap_sync(sc->dc_tx_ltag, sc->dc_tx_lmap,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
}
/*

37
sys/dev/dc/if_dcreg.h
View File

@ -471,11 +471,15 @@ struct dc_desc {
#define DC_INC(x, y) (x) = (x + 1) % y
#define DC_LIST_ALIGN (sizeof(struct dc_desc))
#define DC_RXBUF_ALIGN 4
/* Macros to easily get the DMA address of a descriptor. */
#define DC_RXDESC(sc, i) (sc->dc_laddr + \
(uintptr_t)(sc->dc_ldata->dc_rx_list + i) - (uintptr_t)sc->dc_ldata)
#define DC_TXDESC(sc, i) (sc->dc_laddr + \
(uintptr_t)(sc->dc_ldata->dc_tx_list + i) - (uintptr_t)sc->dc_ldata)
#define DC_ADDR_LO(x) ((uint64_t)(x) & 0xFFFFFFFF)
#define DC_RXDESC(sc, i) \
(DC_ADDR_LO(sc->dc_ldata.dc_rx_list_paddr + (sizeof(struct dc_desc) * i)))
#define DC_TXDESC(sc, i) \
(DC_ADDR_LO(sc->dc_ldata.dc_tx_list_paddr + (sizeof(struct dc_desc) * i)))
#if BYTE_ORDER == BIG_ENDIAN
#define DC_SP_MAC(x) ((x) << 16)
@ -484,10 +488,15 @@ struct dc_desc {
#endif
struct dc_list_data {
struct dc_desc dc_rx_list[DC_RX_LIST_CNT];
struct dc_desc dc_tx_list[DC_TX_LIST_CNT];
struct dc_desc *dc_rx_list;
bus_addr_t dc_rx_list_paddr;
struct dc_desc *dc_tx_list;
bus_addr_t dc_tx_list_paddr;
};
#define DC_RX_LIST_SZ ((sizeof(struct dc_desc) * DC_RX_LIST_CNT))
#define DC_TX_LIST_SZ ((sizeof(struct dc_desc) * DC_TX_LIST_CNT))
struct dc_chain_data {
struct mbuf *dc_rx_chain[DC_RX_LIST_CNT];
struct mbuf *dc_tx_chain[DC_TX_LIST_CNT];
@ -722,14 +731,17 @@ struct dc_softc {
device_t dc_dev; /* device info */
bus_space_handle_t dc_bhandle; /* bus space handle */
bus_space_tag_t dc_btag; /* bus space tag */
bus_dma_tag_t dc_ltag; /* tag for descriptor ring */
bus_dmamap_t dc_lmap; /* map for descriptor ring */
u_int32_t dc_laddr; /* DMA address of dc_ldata */
bus_dma_tag_t dc_mtag; /* tag for mbufs */
bus_dma_tag_t dc_ptag; /* parent DMA tag */
bus_dmamap_t dc_sparemap;
bus_dma_tag_t dc_rx_ltag; /* tag for RX descriptors */
bus_dmamap_t dc_rx_lmap;
bus_dma_tag_t dc_tx_ltag; /* tag for TX descriptors */
bus_dmamap_t dc_tx_lmap;
bus_dma_tag_t dc_stag; /* tag for the setup frame */
bus_dmamap_t dc_smap; /* map for the setup frame */
u_int32_t dc_saddr; /* DMA address of setup frame */
bus_addr_t dc_saddr; /* DMA address of setup frame */
bus_dma_tag_t dc_rx_mtag; /* tag for RX mbufs */
bus_dma_tag_t dc_tx_mtag; /* tag for TX mbufs */
void *dc_intrhand;
struct resource *dc_irq;
struct resource *dc_res;
@ -749,7 +761,7 @@ struct dc_softc {
u_int32_t dc_eaddr[2];
u_int8_t *dc_srom;
struct dc_mediainfo *dc_mi;
struct dc_list_data *dc_ldata;
struct dc_list_data dc_ldata;
struct dc_chain_data dc_cdata;
struct callout dc_stat_ch;
struct callout dc_wdog_ch;
@ -796,7 +808,6 @@ struct dc_softc {
bus_space_barrier(sc->dc_btag, sc->dc_bhandle, reg, 4, flags)
#define DC_TIMEOUT 1000
#define ETHER_ALIGN 2
/*
* General constants that are fun to know.