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freebsd-skq/sys/dev/tsec/if_tsec.c
Nathan Whitehorn 629aa519d6 Make tsec work with the device tree present on the RB800. The previous code 
assumed that the MDIO bus was a direct child of the Ethernet interface. It
may not be and indeed on many device trees is not. While here, add proper
locking for MII transactions, which may be on a bus shared by several MACs.

Hardware donated by:	Benjamin Perrault
2013-11-11 15:43:21 +00:00

1941 lines
47 KiB
C
Raw Blame History

/*-
* Copyright (C) 2007-2008 Semihalf, Rafal Jaworowski
* Copyright (C) 2006-2007 Semihalf, Piotr Kruszynski
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
* NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* Freescale integrated Three-Speed Ethernet Controller (TSEC) driver.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#ifdef HAVE_KERNEL_OPTION_HEADERS
#include "opt_device_polling.h"
#endif
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/mbuf.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <net/bpf.h>
#include <net/ethernet.h>
#include <net/if.h>
#include <net/if_var.h>
#include <net/if_arp.h>
#include <net/if_dl.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#include <netinet/in_systm.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <machine/bus.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/tsec/if_tsec.h>
#include <dev/tsec/if_tsecreg.h>
static int tsec_alloc_dma_desc(device_t dev, bus_dma_tag_t *dtag,
bus_dmamap_t *dmap, bus_size_t dsize, void **vaddr, void *raddr,
const char *dname);
static void tsec_dma_ctl(struct tsec_softc *sc, int state);
static int tsec_encap(struct tsec_softc *sc, struct mbuf *m_head,
int fcb_inserted);
static void tsec_free_dma(struct tsec_softc *sc);
static void tsec_free_dma_desc(bus_dma_tag_t dtag, bus_dmamap_t dmap, void *vaddr);
static int tsec_ifmedia_upd(struct ifnet *ifp);
static void tsec_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr);
static int tsec_new_rxbuf(bus_dma_tag_t tag, bus_dmamap_t map,
struct mbuf **mbufp, uint32_t *paddr);
static void tsec_map_dma_addr(void *arg, bus_dma_segment_t *segs,
int nseg, int error);
static void tsec_intrs_ctl(struct tsec_softc *sc, int state);
static void tsec_init(void *xsc);
static void tsec_init_locked(struct tsec_softc *sc);
static int tsec_ioctl(struct ifnet *ifp, u_long command, caddr_t data);
static void tsec_reset_mac(struct tsec_softc *sc);
static void tsec_setfilter(struct tsec_softc *sc);
static void tsec_set_mac_address(struct tsec_softc *sc);
static void tsec_start(struct ifnet *ifp);
static void tsec_start_locked(struct ifnet *ifp);
static void tsec_stop(struct tsec_softc *sc);
static void tsec_tick(void *arg);
static void tsec_watchdog(struct tsec_softc *sc);
static void tsec_add_sysctls(struct tsec_softc *sc);
static int tsec_sysctl_ic_time(SYSCTL_HANDLER_ARGS);
static int tsec_sysctl_ic_count(SYSCTL_HANDLER_ARGS);
static void tsec_set_rxic(struct tsec_softc *sc);
static void tsec_set_txic(struct tsec_softc *sc);
static int tsec_receive_intr_locked(struct tsec_softc *sc, int count);
static void tsec_transmit_intr_locked(struct tsec_softc *sc);
static void tsec_error_intr_locked(struct tsec_softc *sc, int count);
static void tsec_offload_setup(struct tsec_softc *sc);
static void tsec_offload_process_frame(struct tsec_softc *sc,
struct mbuf *m);
static void tsec_setup_multicast(struct tsec_softc *sc);
static int tsec_set_mtu(struct tsec_softc *sc, unsigned int mtu);
devclass_t tsec_devclass;
DRIVER_MODULE(miibus, tsec, miibus_driver, miibus_devclass, 0, 0);
MODULE_DEPEND(tsec, ether, 1, 1, 1);
MODULE_DEPEND(tsec, miibus, 1, 1, 1);
struct mtx tsec_phy_mtx;
int
tsec_attach(struct tsec_softc *sc)
{
uint8_t hwaddr[ETHER_ADDR_LEN];
struct ifnet *ifp;
bus_dmamap_t *map_ptr;
bus_dmamap_t **map_pptr;
int error = 0;
int i;
/* Initialize global (because potentially shared) MII lock */
if (!mtx_initialized(&tsec_phy_mtx))
mtx_init(&tsec_phy_mtx, "tsec mii", NULL, MTX_DEF);
/* Reset all TSEC counters */
TSEC_TX_RX_COUNTERS_INIT(sc);
/* Stop DMA engine if enabled by firmware */
tsec_dma_ctl(sc, 0);
/* Reset MAC */
tsec_reset_mac(sc);
/* Disable interrupts for now */
tsec_intrs_ctl(sc, 0);
/* Configure defaults for interrupts coalescing */
sc->rx_ic_time = 768;
sc->rx_ic_count = 16;
sc->tx_ic_time = 768;
sc->tx_ic_count = 16;
tsec_set_rxic(sc);
tsec_set_txic(sc);
tsec_add_sysctls(sc);
/* Allocate a busdma tag and DMA safe memory for TX descriptors. */
error = tsec_alloc_dma_desc(sc->dev, &sc->tsec_tx_dtag,
&sc->tsec_tx_dmap, sizeof(*sc->tsec_tx_vaddr) * TSEC_TX_NUM_DESC,
(void **)&sc->tsec_tx_vaddr, &sc->tsec_tx_raddr, "TX");
if (error) {
tsec_detach(sc);
return (ENXIO);
}
/* Allocate a busdma tag and DMA safe memory for RX descriptors. */
error = tsec_alloc_dma_desc(sc->dev, &sc->tsec_rx_dtag,
&sc->tsec_rx_dmap, sizeof(*sc->tsec_rx_vaddr) * TSEC_RX_NUM_DESC,
(void **)&sc->tsec_rx_vaddr, &sc->tsec_rx_raddr, "RX");
if (error) {
tsec_detach(sc);
return (ENXIO);
}
/* Allocate a busdma tag for TX mbufs. */
error = bus_dma_tag_create(NULL, /* parent */
TSEC_TXBUFFER_ALIGNMENT, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filtfunc, filtfuncarg */
MCLBYTES * (TSEC_TX_NUM_DESC - 1), /* maxsize */
TSEC_TX_NUM_DESC - 1, /* nsegments */
MCLBYTES, 0, /* maxsegsz, flags */
NULL, NULL, /* lockfunc, lockfuncarg */
&sc->tsec_tx_mtag); /* dmat */
if (error) {
device_printf(sc->dev, "failed to allocate busdma tag "
"(tx mbufs)\n");
tsec_detach(sc);
return (ENXIO);
}
/* Allocate a busdma tag for RX mbufs. */
error = bus_dma_tag_create(NULL, /* parent */
TSEC_RXBUFFER_ALIGNMENT, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filtfunc, filtfuncarg */
MCLBYTES, /* maxsize */
1, /* nsegments */
MCLBYTES, 0, /* maxsegsz, flags */
NULL, NULL, /* lockfunc, lockfuncarg */
&sc->tsec_rx_mtag); /* dmat */
if (error) {
device_printf(sc->dev, "failed to allocate busdma tag "
"(rx mbufs)\n");
tsec_detach(sc);
return (ENXIO);
}
/* Create TX busdma maps */
map_ptr = sc->tx_map_data;
map_pptr = sc->tx_map_unused_data;
for (i = 0; i < TSEC_TX_NUM_DESC; i++) {
map_pptr[i] = &map_ptr[i];
error = bus_dmamap_create(sc->tsec_tx_mtag, 0, map_pptr[i]);
if (error) {
device_printf(sc->dev, "failed to init TX ring\n");
tsec_detach(sc);
return (ENXIO);
}
}
/* Create RX busdma maps and zero mbuf handlers */
for (i = 0; i < TSEC_RX_NUM_DESC; i++) {
error = bus_dmamap_create(sc->tsec_rx_mtag, 0,
&sc->rx_data[i].map);
if (error) {
device_printf(sc->dev, "failed to init RX ring\n");
tsec_detach(sc);
return (ENXIO);
}
sc->rx_data[i].mbuf = NULL;
}
/* Create mbufs for RX buffers */
for (i = 0; i < TSEC_RX_NUM_DESC; i++) {
error = tsec_new_rxbuf(sc->tsec_rx_mtag, sc->rx_data[i].map,
&sc->rx_data[i].mbuf, &sc->rx_data[i].paddr);
if (error) {
device_printf(sc->dev, "can't load rx DMA map %d, "
"error = %d\n", i, error);
tsec_detach(sc);
return (error);
}
}
/* Create network interface for upper layers */
ifp = sc->tsec_ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) {
device_printf(sc->dev, "if_alloc() failed\n");
tsec_detach(sc);
return (ENOMEM);
}
ifp->if_softc = sc;
if_initname(ifp, device_get_name(sc->dev), device_get_unit(sc->dev));
ifp->if_flags = IFF_SIMPLEX | IFF_MULTICAST | IFF_BROADCAST;
ifp->if_init = tsec_init;
ifp->if_start = tsec_start;
ifp->if_ioctl = tsec_ioctl;
IFQ_SET_MAXLEN(&ifp->if_snd, TSEC_TX_NUM_DESC - 1);
ifp->if_snd.ifq_drv_maxlen = TSEC_TX_NUM_DESC - 1;
IFQ_SET_READY(&ifp->if_snd);
ifp->if_capabilities = IFCAP_VLAN_MTU;
if (sc->is_etsec)
ifp->if_capabilities |= IFCAP_HWCSUM;
ifp->if_capenable = ifp->if_capabilities;
#ifdef DEVICE_POLLING
/* Advertise that polling is supported */
ifp->if_capabilities |= IFCAP_POLLING;
#endif
/* Attach PHY(s) */
error = mii_attach(sc->dev, &sc->tsec_miibus, ifp, tsec_ifmedia_upd,
tsec_ifmedia_sts, BMSR_DEFCAPMASK, sc->phyaddr, MII_OFFSET_ANY,
0);
if (error) {
device_printf(sc->dev, "attaching PHYs failed\n");
if_free(ifp);
sc->tsec_ifp = NULL;
tsec_detach(sc);
return (error);
}
sc->tsec_mii = device_get_softc(sc->tsec_miibus);
/* Set MAC address */
tsec_get_hwaddr(sc, hwaddr);
ether_ifattach(ifp, hwaddr);
return (0);
}
int
tsec_detach(struct tsec_softc *sc)
{
if (sc->tsec_ifp != NULL) {
#ifdef DEVICE_POLLING
if (sc->tsec_ifp->if_capenable & IFCAP_POLLING)
ether_poll_deregister(sc->tsec_ifp);
#endif
/* Stop TSEC controller and free TX queue */
if (sc->sc_rres)
tsec_shutdown(sc->dev);
/* Detach network interface */
ether_ifdetach(sc->tsec_ifp);
if_free(sc->tsec_ifp);
sc->tsec_ifp = NULL;
}
/* Free DMA resources */
tsec_free_dma(sc);
return (0);
}
int
tsec_shutdown(device_t dev)
{
struct tsec_softc *sc;
sc = device_get_softc(dev);
TSEC_GLOBAL_LOCK(sc);
tsec_stop(sc);
TSEC_GLOBAL_UNLOCK(sc);
return (0);
}
int
tsec_suspend(device_t dev)
{
/* TODO not implemented! */
return (0);
}
int
tsec_resume(device_t dev)
{
/* TODO not implemented! */
return (0);
}
static void
tsec_init(void *xsc)
{
struct tsec_softc *sc = xsc;
TSEC_GLOBAL_LOCK(sc);
tsec_init_locked(sc);
TSEC_GLOBAL_UNLOCK(sc);
}
static void
tsec_init_locked(struct tsec_softc *sc)
{
struct tsec_desc *tx_desc = sc->tsec_tx_vaddr;
struct tsec_desc *rx_desc = sc->tsec_rx_vaddr;
struct ifnet *ifp = sc->tsec_ifp;
uint32_t timeout, val, i;
if (ifp->if_drv_flags & IFF_DRV_RUNNING)
return;
TSEC_GLOBAL_LOCK_ASSERT(sc);
tsec_stop(sc);
/*
* These steps are according to the MPC8555E PowerQUICCIII RM:
* 14.7 Initialization/Application Information
*/
/* Step 1: soft reset MAC */
tsec_reset_mac(sc);
/* Step 2: Initialize MACCFG2 */
TSEC_WRITE(sc, TSEC_REG_MACCFG2,
TSEC_MACCFG2_FULLDUPLEX | /* Full Duplex = 1 */
TSEC_MACCFG2_PADCRC | /* PAD/CRC append */
TSEC_MACCFG2_GMII | /* I/F Mode bit */
TSEC_MACCFG2_PRECNT /* Preamble count = 7 */
);
/* Step 3: Initialize ECNTRL
* While the documentation states that R100M is ignored if RPM is
* not set, it does seem to be needed to get the orange boxes to
* work (which have a Marvell 88E1111 PHY). Go figure.
*/
/*
* XXX kludge - use circumstancial evidence to program ECNTRL
* correctly. Ideally we need some board information to guide
* us here.
*/
i = TSEC_READ(sc, TSEC_REG_ID2);
val = (i & 0xffff)
? (TSEC_ECNTRL_TBIM | TSEC_ECNTRL_SGMIIM) /* Sumatra */
: TSEC_ECNTRL_R100M; /* Orange + CDS */
TSEC_WRITE(sc, TSEC_REG_ECNTRL, TSEC_ECNTRL_STEN | val);
/* Step 4: Initialize MAC station address */
tsec_set_mac_address(sc);
/*
* Step 5: Assign a Physical address to the TBI so as to not conflict
* with the external PHY physical address
*/
TSEC_WRITE(sc, TSEC_REG_TBIPA, 5);
TSEC_PHY_LOCK(sc);
/* Step 6: Reset the management interface */
TSEC_PHY_WRITE(sc, TSEC_REG_MIIMCFG, TSEC_MIIMCFG_RESETMGMT);
/* Step 7: Setup the MII Mgmt clock speed */
TSEC_PHY_WRITE(sc, TSEC_REG_MIIMCFG, TSEC_MIIMCFG_CLKDIV28);
/* Step 8: Read MII Mgmt indicator register and check for Busy = 0 */
timeout = TSEC_READ_RETRY;
while (--timeout && (TSEC_PHY_READ(sc, TSEC_REG_MIIMIND) &
TSEC_MIIMIND_BUSY))
DELAY(TSEC_READ_DELAY);
if (timeout == 0) {
if_printf(ifp, "tsec_init_locked(): Mgmt busy timeout\n");
return;
}
TSEC_PHY_UNLOCK(sc);
/* Step 9: Setup the MII Mgmt */
mii_mediachg(sc->tsec_mii);
/* Step 10: Clear IEVENT register */
TSEC_WRITE(sc, TSEC_REG_IEVENT, 0xffffffff);
/* Step 11: Enable interrupts */
#ifdef DEVICE_POLLING
/*
* ...only if polling is not turned on. Disable interrupts explicitly
* if polling is enabled.
*/
if (ifp->if_capenable & IFCAP_POLLING )
tsec_intrs_ctl(sc, 0);
else
#endif /* DEVICE_POLLING */
tsec_intrs_ctl(sc, 1);
/* Step 12: Initialize IADDRn */
TSEC_WRITE(sc, TSEC_REG_IADDR0, 0);
TSEC_WRITE(sc, TSEC_REG_IADDR1, 0);
TSEC_WRITE(sc, TSEC_REG_IADDR2, 0);
TSEC_WRITE(sc, TSEC_REG_IADDR3, 0);
TSEC_WRITE(sc, TSEC_REG_IADDR4, 0);
TSEC_WRITE(sc, TSEC_REG_IADDR5, 0);
TSEC_WRITE(sc, TSEC_REG_IADDR6, 0);
TSEC_WRITE(sc, TSEC_REG_IADDR7, 0);
/* Step 13: Initialize GADDRn */
TSEC_WRITE(sc, TSEC_REG_GADDR0, 0);
TSEC_WRITE(sc, TSEC_REG_GADDR1, 0);
TSEC_WRITE(sc, TSEC_REG_GADDR2, 0);
TSEC_WRITE(sc, TSEC_REG_GADDR3, 0);
TSEC_WRITE(sc, TSEC_REG_GADDR4, 0);
TSEC_WRITE(sc, TSEC_REG_GADDR5, 0);
TSEC_WRITE(sc, TSEC_REG_GADDR6, 0);
TSEC_WRITE(sc, TSEC_REG_GADDR7, 0);
/* Step 14: Initialize RCTRL */
TSEC_WRITE(sc, TSEC_REG_RCTRL, 0);
/* Step 15: Initialize DMACTRL */
tsec_dma_ctl(sc, 1);
/* Step 16: Initialize FIFO_PAUSE_CTRL */
TSEC_WRITE(sc, TSEC_REG_FIFO_PAUSE_CTRL, TSEC_FIFO_PAUSE_CTRL_EN);
/*
* Step 17: Initialize transmit/receive descriptor rings.
* Initialize TBASE and RBASE.
*/
TSEC_WRITE(sc, TSEC_REG_TBASE, sc->tsec_tx_raddr);
TSEC_WRITE(sc, TSEC_REG_RBASE, sc->tsec_rx_raddr);
for (i = 0; i < TSEC_TX_NUM_DESC; i++) {
tx_desc[i].bufptr = 0;
tx_desc[i].length = 0;
tx_desc[i].flags = ((i == TSEC_TX_NUM_DESC - 1) ?
TSEC_TXBD_W : 0);
}
bus_dmamap_sync(sc->tsec_tx_dtag, sc->tsec_tx_dmap,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
for (i = 0; i < TSEC_RX_NUM_DESC; i++) {
rx_desc[i].bufptr = sc->rx_data[i].paddr;
rx_desc[i].length = 0;
rx_desc[i].flags = TSEC_RXBD_E | TSEC_RXBD_I |
((i == TSEC_RX_NUM_DESC - 1) ? TSEC_RXBD_W : 0);
}
bus_dmamap_sync(sc->tsec_rx_dtag, sc->tsec_rx_dmap,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/* Step 18: Initialize the maximum receive buffer length */
TSEC_WRITE(sc, TSEC_REG_MRBLR, MCLBYTES);
/* Step 19: Configure ethernet frame sizes */
TSEC_WRITE(sc, TSEC_REG_MINFLR, TSEC_MIN_FRAME_SIZE);
tsec_set_mtu(sc, ifp->if_mtu);
/* Step 20: Enable Rx and RxBD sdata snooping */
TSEC_WRITE(sc, TSEC_REG_ATTR, TSEC_ATTR_RDSEN | TSEC_ATTR_RBDSEN);
TSEC_WRITE(sc, TSEC_REG_ATTRELI, 0);
/* Step 21: Reset collision counters in hardware */
TSEC_WRITE(sc, TSEC_REG_MON_TSCL, 0);
TSEC_WRITE(sc, TSEC_REG_MON_TMCL, 0);
TSEC_WRITE(sc, TSEC_REG_MON_TLCL, 0);
TSEC_WRITE(sc, TSEC_REG_MON_TXCL, 0);
TSEC_WRITE(sc, TSEC_REG_MON_TNCL, 0);
/* Step 22: Mask all CAM interrupts */
TSEC_WRITE(sc, TSEC_REG_MON_CAM1, 0xffffffff);
TSEC_WRITE(sc, TSEC_REG_MON_CAM2, 0xffffffff);
/* Step 23: Enable Rx and Tx */
val = TSEC_READ(sc, TSEC_REG_MACCFG1);
val |= (TSEC_MACCFG1_RX_EN | TSEC_MACCFG1_TX_EN);
TSEC_WRITE(sc, TSEC_REG_MACCFG1, val);
/* Step 24: Reset TSEC counters for Tx and Rx rings */
TSEC_TX_RX_COUNTERS_INIT(sc);
/* Step 25: Setup TCP/IP Off-Load engine */
if (sc->is_etsec)
tsec_offload_setup(sc);
/* Step 26: Setup multicast filters */
tsec_setup_multicast(sc);
/* Step 27: Activate network interface */
ifp->if_drv_flags |= IFF_DRV_RUNNING;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
sc->tsec_if_flags = ifp->if_flags;
sc->tsec_watchdog = 0;
/* Schedule watchdog timeout */
callout_reset(&sc->tsec_callout, hz, tsec_tick, sc);
}
static void
tsec_set_mac_address(struct tsec_softc *sc)
{
uint32_t macbuf[2] = { 0, 0 };
char *macbufp, *curmac;
int i;
TSEC_GLOBAL_LOCK_ASSERT(sc);
KASSERT((ETHER_ADDR_LEN <= sizeof(macbuf)),
("tsec_set_mac_address: (%d <= %d", ETHER_ADDR_LEN,
sizeof(macbuf)));
macbufp = (char *)macbuf;
curmac = (char *)IF_LLADDR(sc->tsec_ifp);
/* Correct order of MAC address bytes */
for (i = 1; i <= ETHER_ADDR_LEN; i++)
macbufp[ETHER_ADDR_LEN-i] = curmac[i-1];
/* Initialize MAC station address MACSTNADDR2 and MACSTNADDR1 */
TSEC_WRITE(sc, TSEC_REG_MACSTNADDR2, macbuf[1]);
TSEC_WRITE(sc, TSEC_REG_MACSTNADDR1, macbuf[0]);
}
/*
* DMA control function, if argument state is:
* 0 - DMA engine will be disabled
* 1 - DMA engine will be enabled
*/
static void
tsec_dma_ctl(struct tsec_softc *sc, int state)
{
device_t dev;
uint32_t dma_flags, timeout;
dev = sc->dev;
dma_flags = TSEC_READ(sc, TSEC_REG_DMACTRL);
switch (state) {
case 0:
/* Temporarily clear stop graceful stop bits. */
tsec_dma_ctl(sc, 1000);
/* Set it again */
dma_flags |= (TSEC_DMACTRL_GRS | TSEC_DMACTRL_GTS);
break;
case 1000:
case 1:
/* Set write with response (WWR), wait (WOP) and snoop bits */
dma_flags |= (TSEC_DMACTRL_TDSEN | TSEC_DMACTRL_TBDSEN |
DMACTRL_WWR | DMACTRL_WOP);
/* Clear graceful stop bits */
dma_flags &= ~(TSEC_DMACTRL_GRS | TSEC_DMACTRL_GTS);
break;
default:
device_printf(dev, "tsec_dma_ctl(): unknown state value: %d\n",
state);
}
TSEC_WRITE(sc, TSEC_REG_DMACTRL, dma_flags);
switch (state) {
case 0:
/* Wait for DMA stop */
timeout = TSEC_READ_RETRY;
while (--timeout && (!(TSEC_READ(sc, TSEC_REG_IEVENT) &
(TSEC_IEVENT_GRSC | TSEC_IEVENT_GTSC))))
DELAY(TSEC_READ_DELAY);
if (timeout == 0)
device_printf(dev, "tsec_dma_ctl(): timeout!\n");
break;
case 1:
/* Restart transmission function */
TSEC_WRITE(sc, TSEC_REG_TSTAT, TSEC_TSTAT_THLT);
}
}
/*
* Interrupts control function, if argument state is:
* 0 - all TSEC interrupts will be masked
* 1 - all TSEC interrupts will be unmasked
*/
static void
tsec_intrs_ctl(struct tsec_softc *sc, int state)
{
device_t dev;
dev = sc->dev;
switch (state) {
case 0:
TSEC_WRITE(sc, TSEC_REG_IMASK, 0);
break;
case 1:
TSEC_WRITE(sc, TSEC_REG_IMASK, TSEC_IMASK_BREN |
TSEC_IMASK_RXCEN | TSEC_IMASK_BSYEN | TSEC_IMASK_EBERREN |
TSEC_IMASK_BTEN | TSEC_IMASK_TXEEN | TSEC_IMASK_TXBEN |
TSEC_IMASK_TXFEN | TSEC_IMASK_XFUNEN | TSEC_IMASK_RXFEN);
break;
default:
device_printf(dev, "tsec_intrs_ctl(): unknown state value: %d\n",
state);
}
}
static void
tsec_reset_mac(struct tsec_softc *sc)
{
uint32_t maccfg1_flags;
/* Set soft reset bit */
maccfg1_flags = TSEC_READ(sc, TSEC_REG_MACCFG1);
maccfg1_flags |= TSEC_MACCFG1_SOFT_RESET;
TSEC_WRITE(sc, TSEC_REG_MACCFG1, maccfg1_flags);
/* Clear soft reset bit */
maccfg1_flags = TSEC_READ(sc, TSEC_REG_MACCFG1);
maccfg1_flags &= ~TSEC_MACCFG1_SOFT_RESET;
TSEC_WRITE(sc, TSEC_REG_MACCFG1, maccfg1_flags);
}
static void
tsec_watchdog(struct tsec_softc *sc)
{
struct ifnet *ifp;
TSEC_GLOBAL_LOCK_ASSERT(sc);
if (sc->tsec_watchdog == 0 || --sc->tsec_watchdog > 0)
return;
ifp = sc->tsec_ifp;
ifp->if_oerrors++;
if_printf(ifp, "watchdog timeout\n");
tsec_stop(sc);
tsec_init_locked(sc);
}
static void
tsec_start(struct ifnet *ifp)
{
struct tsec_softc *sc = ifp->if_softc;
TSEC_TRANSMIT_LOCK(sc);
tsec_start_locked(ifp);
TSEC_TRANSMIT_UNLOCK(sc);
}
static void
tsec_start_locked(struct ifnet *ifp)
{
struct tsec_softc *sc;
struct mbuf *m0, *mtmp;
struct tsec_tx_fcb *tx_fcb;
unsigned int queued = 0;
int csum_flags, fcb_inserted = 0;
sc = ifp->if_softc;
TSEC_TRANSMIT_LOCK_ASSERT(sc);
if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
IFF_DRV_RUNNING)
return;
if (sc->tsec_link == 0)
return;
bus_dmamap_sync(sc->tsec_tx_dtag, sc->tsec_tx_dmap,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
while (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) {
/* Get packet from the queue */
IFQ_DRV_DEQUEUE(&ifp->if_snd, m0);
if (m0 == NULL)
break;
/* Insert TCP/IP Off-load frame control block */
csum_flags = m0->m_pkthdr.csum_flags;
if (csum_flags) {
M_PREPEND(m0, sizeof(struct tsec_tx_fcb), M_NOWAIT);
if (m0 == NULL)
break;
tx_fcb = mtod(m0, struct tsec_tx_fcb *);
tx_fcb->flags = 0;
tx_fcb->l3_offset = ETHER_HDR_LEN;
tx_fcb->l4_offset = sizeof(struct ip);
if (csum_flags & CSUM_IP)
tx_fcb->flags |= TSEC_TX_FCB_IP4 |
TSEC_TX_FCB_CSUM_IP;
if (csum_flags & CSUM_TCP)
tx_fcb->flags |= TSEC_TX_FCB_TCP |
TSEC_TX_FCB_CSUM_TCP_UDP;
if (csum_flags & CSUM_UDP)
tx_fcb->flags |= TSEC_TX_FCB_UDP |
TSEC_TX_FCB_CSUM_TCP_UDP;
fcb_inserted = 1;
}
mtmp = m_defrag(m0, M_NOWAIT);
if (mtmp)
m0 = mtmp;
if (tsec_encap(sc, m0, fcb_inserted)) {
IFQ_DRV_PREPEND(&ifp->if_snd, m0);
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
break;
}
queued++;
BPF_MTAP(ifp, m0);
}
bus_dmamap_sync(sc->tsec_tx_dtag, sc->tsec_tx_dmap,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
if (queued) {
/* Enable transmitter and watchdog timer */
TSEC_WRITE(sc, TSEC_REG_TSTAT, TSEC_TSTAT_THLT);
sc->tsec_watchdog = 5;
}
}
static int
tsec_encap(struct tsec_softc *sc, struct mbuf *m0, int fcb_inserted)
{
struct tsec_desc *tx_desc = NULL;
struct ifnet *ifp;
bus_dma_segment_t segs[TSEC_TX_NUM_DESC];
bus_dmamap_t *mapp;
int csum_flag = 0, error, seg, nsegs;
TSEC_TRANSMIT_LOCK_ASSERT(sc);
ifp = sc->tsec_ifp;
if (TSEC_FREE_TX_DESC(sc) == 0) {
/* No free descriptors */
return (-1);
}
/* Fetch unused map */
mapp = TSEC_ALLOC_TX_MAP(sc);
/* Create mapping in DMA memory */
error = bus_dmamap_load_mbuf_sg(sc->tsec_tx_mtag,
*mapp, m0, segs, &nsegs, BUS_DMA_NOWAIT);
if (error != 0 || nsegs > TSEC_FREE_TX_DESC(sc) || nsegs <= 0) {
bus_dmamap_unload(sc->tsec_tx_mtag, *mapp);
TSEC_FREE_TX_MAP(sc, mapp);
return ((error != 0) ? error : -1);
}
bus_dmamap_sync(sc->tsec_tx_mtag, *mapp, BUS_DMASYNC_PREWRITE);
if ((ifp->if_flags & IFF_DEBUG) && (nsegs > 1))
if_printf(ifp, "TX buffer has %d segments\n", nsegs);
if (fcb_inserted)
csum_flag = TSEC_TXBD_TOE;
/* Everything is ok, now we can send buffers */
for (seg = 0; seg < nsegs; seg++) {
tx_desc = TSEC_GET_CUR_TX_DESC(sc);
tx_desc->length = segs[seg].ds_len;
tx_desc->bufptr = segs[seg].ds_addr;
/*
* Set flags:
* - wrap
* - checksum
* - ready to send
* - transmit the CRC sequence after the last data byte
* - interrupt after the last buffer
*/
tx_desc->flags =
(tx_desc->flags & TSEC_TXBD_W) |
((seg == 0) ? csum_flag : 0) | TSEC_TXBD_R | TSEC_TXBD_TC |
((seg == nsegs - 1) ? TSEC_TXBD_L | TSEC_TXBD_I : 0);
}
/* Save mbuf and DMA mapping for release at later stage */
TSEC_PUT_TX_MBUF(sc, m0);
TSEC_PUT_TX_MAP(sc, mapp);
return (0);
}
static void
tsec_setfilter(struct tsec_softc *sc)
{
struct ifnet *ifp;
uint32_t flags;
ifp = sc->tsec_ifp;
flags = TSEC_READ(sc, TSEC_REG_RCTRL);
/* Promiscuous mode */
if (ifp->if_flags & IFF_PROMISC)
flags |= TSEC_RCTRL_PROM;
else
flags &= ~TSEC_RCTRL_PROM;
TSEC_WRITE(sc, TSEC_REG_RCTRL, flags);
}
#ifdef DEVICE_POLLING
static poll_handler_t tsec_poll;
static int
tsec_poll(struct ifnet *ifp, enum poll_cmd cmd, int count)
{
uint32_t ie;
struct tsec_softc *sc = ifp->if_softc;
int rx_npkts;
rx_npkts = 0;
TSEC_GLOBAL_LOCK(sc);
if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
TSEC_GLOBAL_UNLOCK(sc);
return (rx_npkts);
}
if (cmd == POLL_AND_CHECK_STATUS) {
tsec_error_intr_locked(sc, count);
/* Clear all events reported */
ie = TSEC_READ(sc, TSEC_REG_IEVENT);
TSEC_WRITE(sc, TSEC_REG_IEVENT, ie);
}
tsec_transmit_intr_locked(sc);
TSEC_GLOBAL_TO_RECEIVE_LOCK(sc);
rx_npkts = tsec_receive_intr_locked(sc, count);
TSEC_RECEIVE_UNLOCK(sc);
return (rx_npkts);
}
#endif /* DEVICE_POLLING */
static int
tsec_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
{
struct tsec_softc *sc = ifp->if_softc;
struct ifreq *ifr = (struct ifreq *)data;
device_t dev;
int mask, error = 0;
dev = sc->dev;
switch (command) {
case SIOCSIFMTU:
TSEC_GLOBAL_LOCK(sc);
if (tsec_set_mtu(sc, ifr->ifr_mtu))
ifp->if_mtu = ifr->ifr_mtu;
else
error = EINVAL;
TSEC_GLOBAL_UNLOCK(sc);
break;
case SIOCSIFFLAGS:
TSEC_GLOBAL_LOCK(sc);
if (ifp->if_flags & IFF_UP) {
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
if ((sc->tsec_if_flags ^ ifp->if_flags) &
IFF_PROMISC)
tsec_setfilter(sc);
if ((sc->tsec_if_flags ^ ifp->if_flags) &
IFF_ALLMULTI)
tsec_setup_multicast(sc);
} else
tsec_init_locked(sc);
} else if (ifp->if_drv_flags & IFF_DRV_RUNNING)
tsec_stop(sc);
sc->tsec_if_flags = ifp->if_flags;
TSEC_GLOBAL_UNLOCK(sc);
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
TSEC_GLOBAL_LOCK(sc);
tsec_setup_multicast(sc);
TSEC_GLOBAL_UNLOCK(sc);
}
case SIOCGIFMEDIA:
case SIOCSIFMEDIA:
error = ifmedia_ioctl(ifp, ifr, &sc->tsec_mii->mii_media,
command);
break;
case SIOCSIFCAP:
mask = ifp->if_capenable ^ ifr->ifr_reqcap;
if ((mask & IFCAP_HWCSUM) && sc->is_etsec) {
TSEC_GLOBAL_LOCK(sc);
ifp->if_capenable &= ~IFCAP_HWCSUM;
ifp->if_capenable |= IFCAP_HWCSUM & ifr->ifr_reqcap;
tsec_offload_setup(sc);
TSEC_GLOBAL_UNLOCK(sc);
}
#ifdef DEVICE_POLLING
if (mask & IFCAP_POLLING) {
if (ifr->ifr_reqcap & IFCAP_POLLING) {
error = ether_poll_register(tsec_poll, ifp);
if (error)
return (error);
TSEC_GLOBAL_LOCK(sc);
/* Disable interrupts */
tsec_intrs_ctl(sc, 0);
ifp->if_capenable |= IFCAP_POLLING;
TSEC_GLOBAL_UNLOCK(sc);
} else {
error = ether_poll_deregister(ifp);
TSEC_GLOBAL_LOCK(sc);
/* Enable interrupts */
tsec_intrs_ctl(sc, 1);
ifp->if_capenable &= ~IFCAP_POLLING;
TSEC_GLOBAL_UNLOCK(sc);
}
}
#endif
break;
default:
error = ether_ioctl(ifp, command, data);
}
/* Flush buffers if not empty */
if (ifp->if_flags & IFF_UP)
tsec_start(ifp);
return (error);
}
static int
tsec_ifmedia_upd(struct ifnet *ifp)
{
struct tsec_softc *sc = ifp->if_softc;
struct mii_data *mii;
TSEC_TRANSMIT_LOCK(sc);
mii = sc->tsec_mii;
mii_mediachg(mii);
TSEC_TRANSMIT_UNLOCK(sc);
return (0);
}
static void
tsec_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct tsec_softc *sc = ifp->if_softc;
struct mii_data *mii;
TSEC_TRANSMIT_LOCK(sc);
mii = sc->tsec_mii;
mii_pollstat(mii);
ifmr->ifm_active = mii->mii_media_active;
ifmr->ifm_status = mii->mii_media_status;
TSEC_TRANSMIT_UNLOCK(sc);
}
static int
tsec_new_rxbuf(bus_dma_tag_t tag, bus_dmamap_t map, struct mbuf **mbufp,
uint32_t *paddr)
{
struct mbuf *new_mbuf;
bus_dma_segment_t seg[1];
int error, nsegs;
KASSERT(mbufp != NULL, ("NULL mbuf pointer!"));
new_mbuf = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, MCLBYTES);
if (new_mbuf == NULL)
return (ENOBUFS);
new_mbuf->m_len = new_mbuf->m_pkthdr.len = new_mbuf->m_ext.ext_size;
if (*mbufp) {
bus_dmamap_sync(tag, map, BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(tag, map);
}
error = bus_dmamap_load_mbuf_sg(tag, map, new_mbuf, seg, &nsegs,
BUS_DMA_NOWAIT);
KASSERT(nsegs == 1, ("Too many segments returned!"));
if (nsegs != 1 || error)
panic("tsec_new_rxbuf(): nsegs(%d), error(%d)", nsegs, error);
#if 0
if (error) {
printf("tsec: bus_dmamap_load_mbuf_sg() returned: %d!\n",
error);
m_freem(new_mbuf);
return (ENOBUFS);
}
#endif
#if 0
KASSERT(((seg->ds_addr) & (TSEC_RXBUFFER_ALIGNMENT-1)) == 0,
("Wrong alignment of RX buffer!"));
#endif
bus_dmamap_sync(tag, map, BUS_DMASYNC_PREREAD);
(*mbufp) = new_mbuf;
(*paddr) = seg->ds_addr;
return (0);
}
static void
tsec_map_dma_addr(void *arg, bus_dma_segment_t *segs, int nseg, int error)
{
u_int32_t *paddr;
KASSERT(nseg == 1, ("wrong number of segments, should be 1"));
paddr = arg;
*paddr = segs->ds_addr;
}
static int
tsec_alloc_dma_desc(device_t dev, bus_dma_tag_t *dtag, bus_dmamap_t *dmap,
bus_size_t dsize, void **vaddr, void *raddr, const char *dname)
{
int error;
/* Allocate a busdma tag and DMA safe memory for TX/RX descriptors. */
error = bus_dma_tag_create(NULL, /* parent */
PAGE_SIZE, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filtfunc, filtfuncarg */
dsize, 1, /* maxsize, nsegments */
dsize, 0, /* maxsegsz, flags */
NULL, NULL, /* lockfunc, lockfuncarg */
dtag); /* dmat */
if (error) {
device_printf(dev, "failed to allocate busdma %s tag\n",
dname);
(*vaddr) = NULL;
return (ENXIO);
}
error = bus_dmamem_alloc(*dtag, vaddr, BUS_DMA_NOWAIT | BUS_DMA_ZERO,
dmap);
if (error) {
device_printf(dev, "failed to allocate %s DMA safe memory\n",
dname);
bus_dma_tag_destroy(*dtag);
(*vaddr) = NULL;
return (ENXIO);
}
error = bus_dmamap_load(*dtag, *dmap, *vaddr, dsize,
tsec_map_dma_addr, raddr, BUS_DMA_NOWAIT);
if (error) {
device_printf(dev, "cannot get address of the %s "
"descriptors\n", dname);
bus_dmamem_free(*dtag, *vaddr, *dmap);
bus_dma_tag_destroy(*dtag);
(*vaddr) = NULL;
return (ENXIO);
}
return (0);
}
static void
tsec_free_dma_desc(bus_dma_tag_t dtag, bus_dmamap_t dmap, void *vaddr)
{
if (vaddr == NULL)
return;
/* Unmap descriptors from DMA memory */
bus_dmamap_sync(dtag, dmap, BUS_DMASYNC_POSTREAD |
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(dtag, dmap);
/* Free descriptors memory */
bus_dmamem_free(dtag, vaddr, dmap);
/* Destroy descriptors tag */
bus_dma_tag_destroy(dtag);
}
static void
tsec_free_dma(struct tsec_softc *sc)
{
int i;
/* Free TX maps */
for (i = 0; i < TSEC_TX_NUM_DESC; i++)
if (sc->tx_map_data[i] != NULL)
bus_dmamap_destroy(sc->tsec_tx_mtag,
sc->tx_map_data[i]);
/* Destroy tag for TX mbufs */
bus_dma_tag_destroy(sc->tsec_tx_mtag);
/* Free RX mbufs and maps */
for (i = 0; i < TSEC_RX_NUM_DESC; i++) {
if (sc->rx_data[i].mbuf) {
/* Unload buffer from DMA */
bus_dmamap_sync(sc->tsec_rx_mtag, sc->rx_data[i].map,
BUS_DMASYNC_POSTREAD);
bus_dmamap_unload(sc->tsec_rx_mtag,
sc->rx_data[i].map);
/* Free buffer */
m_freem(sc->rx_data[i].mbuf);
}
/* Destroy map for this buffer */
if (sc->rx_data[i].map != NULL)
bus_dmamap_destroy(sc->tsec_rx_mtag,
sc->rx_data[i].map);
}
/* Destroy tag for RX mbufs */
bus_dma_tag_destroy(sc->tsec_rx_mtag);
/* Unload TX/RX descriptors */
tsec_free_dma_desc(sc->tsec_tx_dtag, sc->tsec_tx_dmap,
sc->tsec_tx_vaddr);
tsec_free_dma_desc(sc->tsec_rx_dtag, sc->tsec_rx_dmap,
sc->tsec_rx_vaddr);
}
static void
tsec_stop(struct tsec_softc *sc)
{
struct ifnet *ifp;
struct mbuf *m0;
bus_dmamap_t *mapp;
uint32_t tmpval;
TSEC_GLOBAL_LOCK_ASSERT(sc);
ifp = sc->tsec_ifp;
/* Disable interface and watchdog timer */
callout_stop(&sc->tsec_callout);
ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
sc->tsec_watchdog = 0;
/* Disable all interrupts and stop DMA */
tsec_intrs_ctl(sc, 0);
tsec_dma_ctl(sc, 0);
/* Remove pending data from TX queue */
while (!TSEC_EMPTYQ_TX_MBUF(sc)) {
m0 = TSEC_GET_TX_MBUF(sc);
mapp = TSEC_GET_TX_MAP(sc);
bus_dmamap_sync(sc->tsec_tx_mtag, *mapp,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->tsec_tx_mtag, *mapp);
TSEC_FREE_TX_MAP(sc, mapp);
m_freem(m0);
}
/* Disable RX and TX */
tmpval = TSEC_READ(sc, TSEC_REG_MACCFG1);
tmpval &= ~(TSEC_MACCFG1_RX_EN | TSEC_MACCFG1_TX_EN);
TSEC_WRITE(sc, TSEC_REG_MACCFG1, tmpval);
DELAY(10);
}
static void
tsec_tick(void *arg)
{
struct tsec_softc *sc = arg;
struct ifnet *ifp;
int link;
TSEC_GLOBAL_LOCK(sc);
tsec_watchdog(sc);
ifp = sc->tsec_ifp;
link = sc->tsec_link;
mii_tick(sc->tsec_mii);
if (link == 0 && sc->tsec_link == 1 &&
(!IFQ_DRV_IS_EMPTY(&ifp->if_snd)))
tsec_start_locked(ifp);
/* Schedule another timeout one second from now. */
callout_reset(&sc->tsec_callout, hz, tsec_tick, sc);
TSEC_GLOBAL_UNLOCK(sc);
}
/*
* This is the core RX routine. It replenishes mbufs in the descriptor and
* sends data which have been dma'ed into host memory to upper layer.
*
* Loops at most count times if count is > 0, or until done if count < 0.
*/
static int
tsec_receive_intr_locked(struct tsec_softc *sc, int count)
{
struct tsec_desc *rx_desc;
struct ifnet *ifp;
struct rx_data_type *rx_data;
struct mbuf *m;
device_t dev;
uint32_t i;
int c, rx_npkts;
uint16_t flags;
TSEC_RECEIVE_LOCK_ASSERT(sc);
ifp = sc->tsec_ifp;
rx_data = sc->rx_data;
dev = sc->dev;
rx_npkts = 0;
bus_dmamap_sync(sc->tsec_rx_dtag, sc->tsec_rx_dmap,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
for (c = 0; ; c++) {
if (count >= 0 && count-- == 0)
break;
rx_desc = TSEC_GET_CUR_RX_DESC(sc);
flags = rx_desc->flags;
/* Check if there is anything to receive */
if ((flags & TSEC_RXBD_E) || (c >= TSEC_RX_NUM_DESC)) {
/*
* Avoid generating another interrupt
*/
if (flags & TSEC_RXBD_E)
TSEC_WRITE(sc, TSEC_REG_IEVENT,
TSEC_IEVENT_RXB | TSEC_IEVENT_RXF);
/*
* We didn't consume current descriptor and have to
* return it to the queue
*/
TSEC_BACK_CUR_RX_DESC(sc);
break;
}
if (flags & (TSEC_RXBD_LG | TSEC_RXBD_SH | TSEC_RXBD_NO |
TSEC_RXBD_CR | TSEC_RXBD_OV | TSEC_RXBD_TR)) {
rx_desc->length = 0;
rx_desc->flags = (rx_desc->flags &
~TSEC_RXBD_ZEROONINIT) | TSEC_RXBD_E | TSEC_RXBD_I;
if (sc->frame != NULL) {
m_free(sc->frame);
sc->frame = NULL;
}
continue;
}
/* Ok... process frame */
i = TSEC_GET_CUR_RX_DESC_CNT(sc);
m = rx_data[i].mbuf;
m->m_len = rx_desc->length;
if (sc->frame != NULL) {
if ((flags & TSEC_RXBD_L) != 0)
m->m_len -= m_length(sc->frame, NULL);
m->m_flags &= ~M_PKTHDR;
m_cat(sc->frame, m);
} else {
sc->frame = m;
}
m = NULL;
if ((flags & TSEC_RXBD_L) != 0) {
m = sc->frame;
sc->frame = NULL;
}
if (tsec_new_rxbuf(sc->tsec_rx_mtag, rx_data[i].map,
&rx_data[i].mbuf, &rx_data[i].paddr)) {
ifp->if_ierrors++;
/*
* We ran out of mbufs; didn't consume current
* descriptor and have to return it to the queue.
*/
TSEC_BACK_CUR_RX_DESC(sc);
break;
}
/* Attach new buffer to descriptor and clear flags */
rx_desc->bufptr = rx_data[i].paddr;
rx_desc->length = 0;
rx_desc->flags = (rx_desc->flags & ~TSEC_RXBD_ZEROONINIT) |
TSEC_RXBD_E | TSEC_RXBD_I;
if (m != NULL) {
m->m_pkthdr.rcvif = ifp;
m_fixhdr(m);
m_adj(m, -ETHER_CRC_LEN);
if (sc->is_etsec)
tsec_offload_process_frame(sc, m);
TSEC_RECEIVE_UNLOCK(sc);
(*ifp->if_input)(ifp, m);
TSEC_RECEIVE_LOCK(sc);
rx_npkts++;
}
}
bus_dmamap_sync(sc->tsec_rx_dtag, sc->tsec_rx_dmap,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
/*
* Make sure TSEC receiver is not halted.
*
* Various conditions can stop the TSEC receiver, but not all are
* signaled and handled by error interrupt, so make sure the receiver
* is running. Writing to TSEC_REG_RSTAT restarts the receiver when
* halted, and is harmless if already running.
*/
TSEC_WRITE(sc, TSEC_REG_RSTAT, TSEC_RSTAT_QHLT);
return (rx_npkts);
}
void
tsec_receive_intr(void *arg)
{
struct tsec_softc *sc = arg;
TSEC_RECEIVE_LOCK(sc);
#ifdef DEVICE_POLLING
if (sc->tsec_ifp->if_capenable & IFCAP_POLLING) {
TSEC_RECEIVE_UNLOCK(sc);
return;
}
#endif
/* Confirm the interrupt was received by driver */
TSEC_WRITE(sc, TSEC_REG_IEVENT, TSEC_IEVENT_RXB | TSEC_IEVENT_RXF);
tsec_receive_intr_locked(sc, -1);
TSEC_RECEIVE_UNLOCK(sc);
}
static void
tsec_transmit_intr_locked(struct tsec_softc *sc)
{
struct tsec_desc *tx_desc;
struct ifnet *ifp;
struct mbuf *m0;
bus_dmamap_t *mapp;
int send = 0;
TSEC_TRANSMIT_LOCK_ASSERT(sc);
ifp = sc->tsec_ifp;
/* Update collision statistics */
ifp->if_collisions += TSEC_READ(sc, TSEC_REG_MON_TNCL);
/* Reset collision counters in hardware */
TSEC_WRITE(sc, TSEC_REG_MON_TSCL, 0);
TSEC_WRITE(sc, TSEC_REG_MON_TMCL, 0);
TSEC_WRITE(sc, TSEC_REG_MON_TLCL, 0);
TSEC_WRITE(sc, TSEC_REG_MON_TXCL, 0);
TSEC_WRITE(sc, TSEC_REG_MON_TNCL, 0);
bus_dmamap_sync(sc->tsec_tx_dtag, sc->tsec_tx_dmap,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
while (TSEC_CUR_DIFF_DIRTY_TX_DESC(sc)) {
tx_desc = TSEC_GET_DIRTY_TX_DESC(sc);
if (tx_desc->flags & TSEC_TXBD_R) {
TSEC_BACK_DIRTY_TX_DESC(sc);
break;
}
if ((tx_desc->flags & TSEC_TXBD_L) == 0)
continue;
/*
* This is the last buf in this packet, so unmap and free it.
*/
m0 = TSEC_GET_TX_MBUF(sc);
mapp = TSEC_GET_TX_MAP(sc);
bus_dmamap_sync(sc->tsec_tx_mtag, *mapp,
BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->tsec_tx_mtag, *mapp);
TSEC_FREE_TX_MAP(sc, mapp);
m_freem(m0);
ifp->if_opackets++;
send = 1;
}
bus_dmamap_sync(sc->tsec_tx_dtag, sc->tsec_tx_dmap,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
if (send) {
/* Now send anything that was pending */
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
tsec_start_locked(ifp);
/* Stop wathdog if all sent */
if (TSEC_EMPTYQ_TX_MBUF(sc))
sc->tsec_watchdog = 0;
}
}
void
tsec_transmit_intr(void *arg)
{
struct tsec_softc *sc = arg;
TSEC_TRANSMIT_LOCK(sc);
#ifdef DEVICE_POLLING
if (sc->tsec_ifp->if_capenable & IFCAP_POLLING) {
TSEC_TRANSMIT_UNLOCK(sc);
return;
}
#endif
/* Confirm the interrupt was received by driver */
TSEC_WRITE(sc, TSEC_REG_IEVENT, TSEC_IEVENT_TXB | TSEC_IEVENT_TXF);
tsec_transmit_intr_locked(sc);
TSEC_TRANSMIT_UNLOCK(sc);
}
static void
tsec_error_intr_locked(struct tsec_softc *sc, int count)
{
struct ifnet *ifp;
uint32_t eflags;
TSEC_GLOBAL_LOCK_ASSERT(sc);
ifp = sc->tsec_ifp;
eflags = TSEC_READ(sc, TSEC_REG_IEVENT);
/* Clear events bits in hardware */
TSEC_WRITE(sc, TSEC_REG_IEVENT, TSEC_IEVENT_RXC | TSEC_IEVENT_BSY |
TSEC_IEVENT_EBERR | TSEC_IEVENT_MSRO | TSEC_IEVENT_BABT |
TSEC_IEVENT_TXC | TSEC_IEVENT_TXE | TSEC_IEVENT_LC |
TSEC_IEVENT_CRL | TSEC_IEVENT_XFUN);
/* Check transmitter errors */
if (eflags & TSEC_IEVENT_TXE) {
ifp->if_oerrors++;
if (eflags & TSEC_IEVENT_LC)
ifp->if_collisions++;
TSEC_WRITE(sc, TSEC_REG_TSTAT, TSEC_TSTAT_THLT);
}
/* Check receiver errors */
if (eflags & TSEC_IEVENT_BSY) {
ifp->if_ierrors++;
ifp->if_iqdrops++;
/* Get data from RX buffers */
tsec_receive_intr_locked(sc, count);
}
if (ifp->if_flags & IFF_DEBUG)
if_printf(ifp, "tsec_error_intr(): event flags: 0x%x\n",
eflags);
if (eflags & TSEC_IEVENT_EBERR) {
if_printf(ifp, "System bus error occurred during"
"DMA transaction (flags: 0x%x)\n", eflags);
tsec_init_locked(sc);
}
if (eflags & TSEC_IEVENT_BABT)
ifp->if_oerrors++;
if (eflags & TSEC_IEVENT_BABR)
ifp->if_ierrors++;
}
void
tsec_error_intr(void *arg)
{
struct tsec_softc *sc = arg;
TSEC_GLOBAL_LOCK(sc);
tsec_error_intr_locked(sc, -1);
TSEC_GLOBAL_UNLOCK(sc);
}
int
tsec_miibus_readreg(device_t dev, int phy, int reg)
{
struct tsec_softc *sc;
uint32_t timeout;
int rv;
sc = device_get_softc(dev);
TSEC_PHY_LOCK();
TSEC_PHY_WRITE(sc, TSEC_REG_MIIMADD, (phy << 8) | reg);
TSEC_PHY_WRITE(sc, TSEC_REG_MIIMCOM, 0);
TSEC_PHY_WRITE(sc, TSEC_REG_MIIMCOM, TSEC_MIIMCOM_READCYCLE);
timeout = TSEC_READ_RETRY;
while (--timeout && TSEC_PHY_READ(sc, TSEC_REG_MIIMIND) &
(TSEC_MIIMIND_NOTVALID | TSEC_MIIMIND_BUSY))
DELAY(TSEC_READ_DELAY);
if (timeout == 0)
device_printf(dev, "Timeout while reading from PHY!\n");
rv = TSEC_PHY_READ(sc, TSEC_REG_MIIMSTAT);
TSEC_PHY_UNLOCK();
return (rv);
}
int
tsec_miibus_writereg(device_t dev, int phy, int reg, int value)
{
struct tsec_softc *sc;
uint32_t timeout;
sc = device_get_softc(dev);
TSEC_PHY_LOCK();
TSEC_PHY_WRITE(sc, TSEC_REG_MIIMADD, (phy << 8) | reg);
TSEC_PHY_WRITE(sc, TSEC_REG_MIIMCON, value);
timeout = TSEC_READ_RETRY;
while (--timeout && (TSEC_READ(sc, TSEC_REG_MIIMIND) &
TSEC_MIIMIND_BUSY))
DELAY(TSEC_READ_DELAY);
TSEC_PHY_UNLOCK();
if (timeout == 0)
device_printf(dev, "Timeout while writing to PHY!\n");
return (0);
}
void
tsec_miibus_statchg(device_t dev)
{
struct tsec_softc *sc;
struct mii_data *mii;
uint32_t ecntrl, id, tmp;
int link;
sc = device_get_softc(dev);
mii = sc->tsec_mii;
link = ((mii->mii_media_status & IFM_ACTIVE) ? 1 : 0);
tmp = TSEC_READ(sc, TSEC_REG_MACCFG2) & ~TSEC_MACCFG2_IF;
if ((mii->mii_media_active & IFM_GMASK) == IFM_FDX)
tmp |= TSEC_MACCFG2_FULLDUPLEX;
else
tmp &= ~TSEC_MACCFG2_FULLDUPLEX;
switch (IFM_SUBTYPE(mii->mii_media_active)) {
case IFM_1000_T:
case IFM_1000_SX:
tmp |= TSEC_MACCFG2_GMII;
sc->tsec_link = link;
break;
case IFM_100_TX:
case IFM_10_T:
tmp |= TSEC_MACCFG2_MII;
sc->tsec_link = link;
break;
case IFM_NONE:
if (link)
device_printf(dev, "No speed selected but link "
"active!\n");
sc->tsec_link = 0;
return;
default:
sc->tsec_link = 0;
device_printf(dev, "Unknown speed (%d), link %s!\n",
IFM_SUBTYPE(mii->mii_media_active),
((link) ? "up" : "down"));
return;
}
TSEC_WRITE(sc, TSEC_REG_MACCFG2, tmp);
/* XXX kludge - use circumstantial evidence for reduced mode. */
id = TSEC_READ(sc, TSEC_REG_ID2);
if (id & 0xffff) {
ecntrl = TSEC_READ(sc, TSEC_REG_ECNTRL) & ~TSEC_ECNTRL_R100M;
ecntrl |= (tmp & TSEC_MACCFG2_MII) ? TSEC_ECNTRL_R100M : 0;
TSEC_WRITE(sc, TSEC_REG_ECNTRL, ecntrl);
}
}
static void
tsec_add_sysctls(struct tsec_softc *sc)
{
struct sysctl_ctx_list *ctx;
struct sysctl_oid_list *children;
struct sysctl_oid *tree;
ctx = device_get_sysctl_ctx(sc->dev);
children = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->dev));
tree = SYSCTL_ADD_NODE(ctx, children, OID_AUTO, "int_coal",
CTLFLAG_RD, 0, "TSEC Interrupts coalescing");
children = SYSCTL_CHILDREN(tree);
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "rx_time",
CTLTYPE_UINT | CTLFLAG_RW, sc, TSEC_IC_RX, tsec_sysctl_ic_time,
"I", "IC RX time threshold (0-65535)");
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "rx_count",
CTLTYPE_UINT | CTLFLAG_RW, sc, TSEC_IC_RX, tsec_sysctl_ic_count,
"I", "IC RX frame count threshold (0-255)");
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tx_time",
CTLTYPE_UINT | CTLFLAG_RW, sc, TSEC_IC_TX, tsec_sysctl_ic_time,
"I", "IC TX time threshold (0-65535)");
SYSCTL_ADD_PROC(ctx, children, OID_AUTO, "tx_count",
CTLTYPE_UINT | CTLFLAG_RW, sc, TSEC_IC_TX, tsec_sysctl_ic_count,
"I", "IC TX frame count threshold (0-255)");
}
/*
* With Interrupt Coalescing (IC) active, a transmit/receive frame
* interrupt is raised either upon:
*
* - threshold-defined period of time elapsed, or
* - threshold-defined number of frames is received/transmitted,
* whichever occurs first.
*
* The following sysctls regulate IC behaviour (for TX/RX separately):
*
* dev.tsec.<unit>.int_coal.rx_time
* dev.tsec.<unit>.int_coal.rx_count
* dev.tsec.<unit>.int_coal.tx_time
* dev.tsec.<unit>.int_coal.tx_count
*
* Values:
*
* - 0 for either time or count disables IC on the given TX/RX path
*
* - count: 1-255 (expresses frame count number; note that value of 1 is
* effectively IC off)
*
* - time: 1-65535 (value corresponds to a real time period and is
* expressed in units equivalent to 64 TSEC interface clocks, i.e. one timer
* threshold unit is 26.5 us, 2.56 us, or 512 ns, corresponding to 10 Mbps,
* 100 Mbps, or 1Gbps, respectively. For detailed discussion consult the
* TSEC reference manual.
*/
static int
tsec_sysctl_ic_time(SYSCTL_HANDLER_ARGS)
{
int error;
uint32_t time;
struct tsec_softc *sc = (struct tsec_softc *)arg1;
time = (arg2 == TSEC_IC_RX) ? sc->rx_ic_time : sc->tx_ic_time;
error = sysctl_handle_int(oidp, &time, 0, req);
if (error != 0)
return (error);
if (time > 65535)
return (EINVAL);
TSEC_IC_LOCK(sc);
if (arg2 == TSEC_IC_RX) {
sc->rx_ic_time = time;
tsec_set_rxic(sc);
} else {
sc->tx_ic_time = time;
tsec_set_txic(sc);
}
TSEC_IC_UNLOCK(sc);
return (0);
}
static int
tsec_sysctl_ic_count(SYSCTL_HANDLER_ARGS)
{
int error;
uint32_t count;
struct tsec_softc *sc = (struct tsec_softc *)arg1;
count = (arg2 == TSEC_IC_RX) ? sc->rx_ic_count : sc->tx_ic_count;
error = sysctl_handle_int(oidp, &count, 0, req);
if (error != 0)
return (error);
if (count > 255)
return (EINVAL);
TSEC_IC_LOCK(sc);
if (arg2 == TSEC_IC_RX) {
sc->rx_ic_count = count;
tsec_set_rxic(sc);
} else {
sc->tx_ic_count = count;
tsec_set_txic(sc);
}
TSEC_IC_UNLOCK(sc);
return (0);
}
static void
tsec_set_rxic(struct tsec_softc *sc)
{
uint32_t rxic_val;
if (sc->rx_ic_count == 0 || sc->rx_ic_time == 0)
/* Disable RX IC */
rxic_val = 0;
else {
rxic_val = 0x80000000;
rxic_val |= (sc->rx_ic_count << 21);
rxic_val |= sc->rx_ic_time;
}
TSEC_WRITE(sc, TSEC_REG_RXIC, rxic_val);
}
static void
tsec_set_txic(struct tsec_softc *sc)
{
uint32_t txic_val;
if (sc->tx_ic_count == 0 || sc->tx_ic_time == 0)
/* Disable TX IC */
txic_val = 0;
else {
txic_val = 0x80000000;
txic_val |= (sc->tx_ic_count << 21);
txic_val |= sc->tx_ic_time;
}
TSEC_WRITE(sc, TSEC_REG_TXIC, txic_val);
}
static void
tsec_offload_setup(struct tsec_softc *sc)
{
struct ifnet *ifp = sc->tsec_ifp;
uint32_t reg;
TSEC_GLOBAL_LOCK_ASSERT(sc);
reg = TSEC_READ(sc, TSEC_REG_TCTRL);
reg |= TSEC_TCTRL_IPCSEN | TSEC_TCTRL_TUCSEN;
if (ifp->if_capenable & IFCAP_TXCSUM)
ifp->if_hwassist = TSEC_CHECKSUM_FEATURES;
else
ifp->if_hwassist = 0;
TSEC_WRITE(sc, TSEC_REG_TCTRL, reg);
reg = TSEC_READ(sc, TSEC_REG_RCTRL);
reg &= ~(TSEC_RCTRL_IPCSEN | TSEC_RCTRL_TUCSEN | TSEC_RCTRL_PRSDEP);
reg |= TSEC_RCTRL_PRSDEP_PARSE_L2 | TSEC_RCTRL_VLEX;
if (ifp->if_capenable & IFCAP_RXCSUM)
reg |= TSEC_RCTRL_IPCSEN | TSEC_RCTRL_TUCSEN |
TSEC_RCTRL_PRSDEP_PARSE_L234;
TSEC_WRITE(sc, TSEC_REG_RCTRL, reg);
}
static void
tsec_offload_process_frame(struct tsec_softc *sc, struct mbuf *m)
{
struct tsec_rx_fcb rx_fcb;
int csum_flags = 0;
int protocol, flags;
TSEC_RECEIVE_LOCK_ASSERT(sc);
m_copydata(m, 0, sizeof(struct tsec_rx_fcb), (caddr_t)(&rx_fcb));
flags = rx_fcb.flags;
protocol = rx_fcb.protocol;
if (TSEC_RX_FCB_IP_CSUM_CHECKED(flags)) {
csum_flags |= CSUM_IP_CHECKED;
if ((flags & TSEC_RX_FCB_IP_CSUM_ERROR) == 0)
csum_flags |= CSUM_IP_VALID;
}
if ((protocol == IPPROTO_TCP || protocol == IPPROTO_UDP) &&
TSEC_RX_FCB_TCP_UDP_CSUM_CHECKED(flags) &&
(flags & TSEC_RX_FCB_TCP_UDP_CSUM_ERROR) == 0) {
csum_flags |= CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
m->m_pkthdr.csum_data = 0xFFFF;
}
m->m_pkthdr.csum_flags = csum_flags;
if (flags & TSEC_RX_FCB_VLAN) {
m->m_pkthdr.ether_vtag = rx_fcb.vlan;
m->m_flags |= M_VLANTAG;
}
m_adj(m, sizeof(struct tsec_rx_fcb));
}
static void
tsec_setup_multicast(struct tsec_softc *sc)
{
uint32_t hashtable[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
struct ifnet *ifp = sc->tsec_ifp;
struct ifmultiaddr *ifma;
uint32_t h;
int i;
TSEC_GLOBAL_LOCK_ASSERT(sc);
if (ifp->if_flags & IFF_ALLMULTI) {
for (i = 0; i < 8; i++)
TSEC_WRITE(sc, TSEC_REG_GADDR(i), 0xFFFFFFFF);
return;
}
if_maddr_rlock(ifp);
TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
h = (ether_crc32_be(LLADDR((struct sockaddr_dl *)
ifma->ifma_addr), ETHER_ADDR_LEN) >> 24) & 0xFF;
hashtable[(h >> 5)] |= 1 << (0x1F - (h & 0x1F));
}
if_maddr_runlock(ifp);
for (i = 0; i < 8; i++)
TSEC_WRITE(sc, TSEC_REG_GADDR(i), hashtable[i]);
}
static int
tsec_set_mtu(struct tsec_softc *sc, unsigned int mtu)
{
mtu += ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN + ETHER_CRC_LEN;
TSEC_GLOBAL_LOCK_ASSERT(sc);
if (mtu >= TSEC_MIN_FRAME_SIZE && mtu <= TSEC_MAX_FRAME_SIZE) {
TSEC_WRITE(sc, TSEC_REG_MAXFRM, mtu);
return (mtu);
}
return (0);
}
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