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freebsd-nq/sys/dev/ale/if_ale.c
Marius Strobl 3fcb7a5365 - Remove attempts to implement setting of BMCR_LOOP/MIIF_NOLOOP 
(reporting IFM_LOOP based on BMCR_LOOP is left in place though as
  it might provide useful for debugging). For most mii(4) drivers it
  was unclear whether the PHYs driven by them actually support
  loopback or not. Moreover, typically loopback mode also needs to
  be activated on the MAC, which none of the Ethernet drivers using
  mii(4) implements. Given that loopback media has no real use (and
  obviously hardly had a chance to actually work) besides for driver
  development (which just loopback mode should be sufficient for
  though, i.e one doesn't necessary need support for loopback media)
  support for it is just dropped as both NetBSD and OpenBSD already
  did quite some time ago.
- Let mii_phy_add_media() also announce the support of IFM_NONE.
- Restructure the PHY entry points to use a structure of entry points
  instead of discrete function pointers, and extend this to include
  a "reset" entry point. Make sure any PHY-specific reset routine is
  always used, and provide one for lxtphy(4) which disables MII
  interrupts (as is done for a few other PHYs we have drivers for).
  This includes changing NIC drivers which previously just called the
  generic mii_phy_reset() to now actually call the PHY-specific reset
  routine, which might be crucial in some cases. While at it, the
  redundant checks in these NIC drivers for mii->mii_instance not being
  zero before calling the reset routines were removed because as soon
  as one PHY driver attaches mii->mii_instance is incremented and we
  hardly can end up in their media change callbacks etc if no PHY driver
  has attached as mii_attach() would have failed in that case and not
  attach a miibus(4) instance.
  Consequently, NIC drivers now no longer should call mii_phy_reset()
  directly, so it was removed from EXPORT_SYMS.
- Add a mii_phy_dev_attach() as a companion helper to mii_phy_dev_probe().
  The purpose of that function is to perform the common steps to attach
  a PHY driver instance and to hook it up to the miibus(4) instance and to
  optionally also handle the probing, addition and initialization of the
  supported media. So all a PHY driver without any special requirements
  has to do in its bus attach method is to call mii_phy_dev_attach()
  along with PHY-specific MIIF_* flags, a pointer to its PHY functions
  and the add_media set to one. All PHY drivers were updated to take
  advantage of mii_phy_dev_attach() as appropriate. Along with these
  changes the capability mask was added to the mii_softc structure so
  PHY drivers taking advantage of mii_phy_dev_attach() but still
  handling media on their own do not need to fiddle with the MII attach
  arguments anyway.
- Keep track of the PHY offset in the mii_softc structure. This is done
  for compatibility with NetBSD/OpenBSD.
- Keep track of the PHY's OUI, model and revision in the mii_softc
  structure. Several PHY drivers require this information also after
  attaching and previously had to wrap their own softc around mii_softc.
  NetBSD/OpenBSD also keep track of the model and revision on their
  mii_softc structure. All PHY drivers were updated to take advantage
  as appropriate.
- Convert the mebers of the MII data structure to unsigned where
  appropriate. This is partly inspired by NetBSD/OpenBSD.
- According to IEEE 802.3-2002 the bits actually have to be reversed
  when mapping an OUI to the MII ID registers. All PHY drivers and
  miidevs where changed as necessary. Actually this now again allows to
  largely share miidevs with NetBSD, which fixed this problem already
  9 years ago. Consequently miidevs was synced as far as possible.
- Add MIIF_NOMANPAUSE and mii_phy_flowstatus() calls to drivers that
  weren't explicitly converted to support flow control before. It's
  unclear whether flow control actually works with these but typically
  it should and their net behavior should be more correct with these
  changes in place than without if the MAC driver sets MIIF_DOPAUSE.

Obtained from:	NetBSD (partially)
Reviewed by:	yongari (earlier version), silence on arch@ and net@
2011-05-03 19:51:29 +00:00

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/*-
* Copyright (c) 2008, Pyun YongHyeon <yongari@FreeBSD.org>
* 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 unmodified, 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 AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.
*/
/* Driver for Atheros AR8121/AR8113/AR8114 PCIe Ethernet. */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mbuf.h>
#include <sys/module.h>
#include <sys/rman.h>
#include <sys/queue.h>
#include <sys/socket.h>
#include <sys/sockio.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <net/bpf.h>
#include <net/if.h>
#include <net/if_arp.h>
#include <net/ethernet.h>
#include <net/if_dl.h>
#include <net/if_llc.h>
#include <net/if_media.h>
#include <net/if_types.h>
#include <net/if_vlan_var.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <dev/mii/mii.h>
#include <dev/mii/miivar.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include <machine/bus.h>
#include <machine/in_cksum.h>
#include <dev/ale/if_alereg.h>
#include <dev/ale/if_alevar.h>
/* "device miibus" required. See GENERIC if you get errors here. */
#include "miibus_if.h"
/* For more information about Tx checksum offload issues see ale_encap(). */
#define ALE_CSUM_FEATURES (CSUM_TCP | CSUM_UDP)
MODULE_DEPEND(ale, pci, 1, 1, 1);
MODULE_DEPEND(ale, ether, 1, 1, 1);
MODULE_DEPEND(ale, miibus, 1, 1, 1);
/* Tunables. */
static int msi_disable = 0;
static int msix_disable = 0;
TUNABLE_INT("hw.ale.msi_disable", &msi_disable);
TUNABLE_INT("hw.ale.msix_disable", &msix_disable);
/*
* Devices supported by this driver.
*/
static struct ale_dev {
uint16_t ale_vendorid;
uint16_t ale_deviceid;
const char *ale_name;
} ale_devs[] = {
{ VENDORID_ATHEROS, DEVICEID_ATHEROS_AR81XX,
"Atheros AR8121/AR8113/AR8114 PCIe Ethernet" },
};
static int ale_attach(device_t);
static int ale_check_boundary(struct ale_softc *);
static int ale_detach(device_t);
static int ale_dma_alloc(struct ale_softc *);
static void ale_dma_free(struct ale_softc *);
static void ale_dmamap_cb(void *, bus_dma_segment_t *, int, int);
static int ale_encap(struct ale_softc *, struct mbuf **);
static void ale_get_macaddr(struct ale_softc *);
static void ale_init(void *);
static void ale_init_locked(struct ale_softc *);
static void ale_init_rx_pages(struct ale_softc *);
static void ale_init_tx_ring(struct ale_softc *);
static void ale_int_task(void *, int);
static int ale_intr(void *);
static int ale_ioctl(struct ifnet *, u_long, caddr_t);
static void ale_link_task(void *, int);
static void ale_mac_config(struct ale_softc *);
static int ale_miibus_readreg(device_t, int, int);
static void ale_miibus_statchg(device_t);
static int ale_miibus_writereg(device_t, int, int, int);
static int ale_mediachange(struct ifnet *);
static void ale_mediastatus(struct ifnet *, struct ifmediareq *);
static void ale_phy_reset(struct ale_softc *);
static int ale_probe(device_t);
static void ale_reset(struct ale_softc *);
static int ale_resume(device_t);
static void ale_rx_update_page(struct ale_softc *, struct ale_rx_page **,
uint32_t, uint32_t *);
static void ale_rxcsum(struct ale_softc *, struct mbuf *, uint32_t);
static int ale_rxeof(struct ale_softc *sc, int);
static void ale_rxfilter(struct ale_softc *);
static void ale_rxvlan(struct ale_softc *);
static void ale_setlinkspeed(struct ale_softc *);
static void ale_setwol(struct ale_softc *);
static int ale_shutdown(device_t);
static void ale_start(struct ifnet *);
static void ale_start_locked(struct ifnet *);
static void ale_stats_clear(struct ale_softc *);
static void ale_stats_update(struct ale_softc *);
static void ale_stop(struct ale_softc *);
static void ale_stop_mac(struct ale_softc *);
static int ale_suspend(device_t);
static void ale_sysctl_node(struct ale_softc *);
static void ale_tick(void *);
static void ale_txeof(struct ale_softc *);
static void ale_watchdog(struct ale_softc *);
static int sysctl_int_range(SYSCTL_HANDLER_ARGS, int, int);
static int sysctl_hw_ale_proc_limit(SYSCTL_HANDLER_ARGS);
static int sysctl_hw_ale_int_mod(SYSCTL_HANDLER_ARGS);
static device_method_t ale_methods[] = {
/* Device interface. */
DEVMETHOD(device_probe, ale_probe),
DEVMETHOD(device_attach, ale_attach),
DEVMETHOD(device_detach, ale_detach),
DEVMETHOD(device_shutdown, ale_shutdown),
DEVMETHOD(device_suspend, ale_suspend),
DEVMETHOD(device_resume, ale_resume),
/* MII interface. */
DEVMETHOD(miibus_readreg, ale_miibus_readreg),
DEVMETHOD(miibus_writereg, ale_miibus_writereg),
DEVMETHOD(miibus_statchg, ale_miibus_statchg),
{ NULL, NULL }
};
static driver_t ale_driver = {
"ale",
ale_methods,
sizeof(struct ale_softc)
};
static devclass_t ale_devclass;
DRIVER_MODULE(ale, pci, ale_driver, ale_devclass, 0, 0);
DRIVER_MODULE(miibus, ale, miibus_driver, miibus_devclass, 0, 0);
static struct resource_spec ale_res_spec_mem[] = {
{ SYS_RES_MEMORY, PCIR_BAR(0), RF_ACTIVE },
{ -1, 0, 0 }
};
static struct resource_spec ale_irq_spec_legacy[] = {
{ SYS_RES_IRQ, 0, RF_ACTIVE | RF_SHAREABLE },
{ -1, 0, 0 }
};
static struct resource_spec ale_irq_spec_msi[] = {
{ SYS_RES_IRQ, 1, RF_ACTIVE },
{ -1, 0, 0 }
};
static struct resource_spec ale_irq_spec_msix[] = {
{ SYS_RES_IRQ, 1, RF_ACTIVE },
{ -1, 0, 0 }
};
static int
ale_miibus_readreg(device_t dev, int phy, int reg)
{
struct ale_softc *sc;
uint32_t v;
int i;
sc = device_get_softc(dev);
CSR_WRITE_4(sc, ALE_MDIO, MDIO_OP_EXECUTE | MDIO_OP_READ |
MDIO_SUP_PREAMBLE | MDIO_CLK_25_4 | MDIO_REG_ADDR(reg));
for (i = ALE_PHY_TIMEOUT; i > 0; i--) {
DELAY(5);
v = CSR_READ_4(sc, ALE_MDIO);
if ((v & (MDIO_OP_EXECUTE | MDIO_OP_BUSY)) == 0)
break;
}
if (i == 0) {
device_printf(sc->ale_dev, "phy read timeout : %d\n", reg);
return (0);
}
return ((v & MDIO_DATA_MASK) >> MDIO_DATA_SHIFT);
}
static int
ale_miibus_writereg(device_t dev, int phy, int reg, int val)
{
struct ale_softc *sc;
uint32_t v;
int i;
sc = device_get_softc(dev);
CSR_WRITE_4(sc, ALE_MDIO, MDIO_OP_EXECUTE | MDIO_OP_WRITE |
(val & MDIO_DATA_MASK) << MDIO_DATA_SHIFT |
MDIO_SUP_PREAMBLE | MDIO_CLK_25_4 | MDIO_REG_ADDR(reg));
for (i = ALE_PHY_TIMEOUT; i > 0; i--) {
DELAY(5);
v = CSR_READ_4(sc, ALE_MDIO);
if ((v & (MDIO_OP_EXECUTE | MDIO_OP_BUSY)) == 0)
break;
}
if (i == 0)
device_printf(sc->ale_dev, "phy write timeout : %d\n", reg);
return (0);
}
static void
ale_miibus_statchg(device_t dev)
{
struct ale_softc *sc;
sc = device_get_softc(dev);
taskqueue_enqueue(taskqueue_swi, &sc->ale_link_task);
}
static void
ale_mediastatus(struct ifnet *ifp, struct ifmediareq *ifmr)
{
struct ale_softc *sc;
struct mii_data *mii;
sc = ifp->if_softc;
ALE_LOCK(sc);
mii = device_get_softc(sc->ale_miibus);
mii_pollstat(mii);
ALE_UNLOCK(sc);
ifmr->ifm_status = mii->mii_media_status;
ifmr->ifm_active = mii->mii_media_active;
}
static int
ale_mediachange(struct ifnet *ifp)
{
struct ale_softc *sc;
struct mii_data *mii;
struct mii_softc *miisc;
int error;
sc = ifp->if_softc;
ALE_LOCK(sc);
mii = device_get_softc(sc->ale_miibus);
LIST_FOREACH(miisc, &mii->mii_phys, mii_list)
PHY_RESET(miisc);
error = mii_mediachg(mii);
ALE_UNLOCK(sc);
return (error);
}
static int
ale_probe(device_t dev)
{
struct ale_dev *sp;
int i;
uint16_t vendor, devid;
vendor = pci_get_vendor(dev);
devid = pci_get_device(dev);
sp = ale_devs;
for (i = 0; i < sizeof(ale_devs) / sizeof(ale_devs[0]); i++) {
if (vendor == sp->ale_vendorid &&
devid == sp->ale_deviceid) {
device_set_desc(dev, sp->ale_name);
return (BUS_PROBE_DEFAULT);
}
sp++;
}
return (ENXIO);
}
static void
ale_get_macaddr(struct ale_softc *sc)
{
uint32_t ea[2], reg;
int i, vpdc;
reg = CSR_READ_4(sc, ALE_SPI_CTRL);
if ((reg & SPI_VPD_ENB) != 0) {
reg &= ~SPI_VPD_ENB;
CSR_WRITE_4(sc, ALE_SPI_CTRL, reg);
}
if (pci_find_cap(sc->ale_dev, PCIY_VPD, &vpdc) == 0) {
/*
* PCI VPD capability found, let TWSI reload EEPROM.
* This will set ethernet address of controller.
*/
CSR_WRITE_4(sc, ALE_TWSI_CTRL, CSR_READ_4(sc, ALE_TWSI_CTRL) |
TWSI_CTRL_SW_LD_START);
for (i = 100; i > 0; i--) {
DELAY(1000);
reg = CSR_READ_4(sc, ALE_TWSI_CTRL);
if ((reg & TWSI_CTRL_SW_LD_START) == 0)
break;
}
if (i == 0)
device_printf(sc->ale_dev,
"reloading EEPROM timeout!\n");
} else {
if (bootverbose)
device_printf(sc->ale_dev,
"PCI VPD capability not found!\n");
}
ea[0] = CSR_READ_4(sc, ALE_PAR0);
ea[1] = CSR_READ_4(sc, ALE_PAR1);
sc->ale_eaddr[0] = (ea[1] >> 8) & 0xFF;
sc->ale_eaddr[1] = (ea[1] >> 0) & 0xFF;
sc->ale_eaddr[2] = (ea[0] >> 24) & 0xFF;
sc->ale_eaddr[3] = (ea[0] >> 16) & 0xFF;
sc->ale_eaddr[4] = (ea[0] >> 8) & 0xFF;
sc->ale_eaddr[5] = (ea[0] >> 0) & 0xFF;
}
static void
ale_phy_reset(struct ale_softc *sc)
{
/* Reset magic from Linux. */
CSR_WRITE_2(sc, ALE_GPHY_CTRL,
GPHY_CTRL_HIB_EN | GPHY_CTRL_HIB_PULSE | GPHY_CTRL_SEL_ANA_RESET |
GPHY_CTRL_PHY_PLL_ON);
DELAY(1000);
CSR_WRITE_2(sc, ALE_GPHY_CTRL,
GPHY_CTRL_EXT_RESET | GPHY_CTRL_HIB_EN | GPHY_CTRL_HIB_PULSE |
GPHY_CTRL_SEL_ANA_RESET | GPHY_CTRL_PHY_PLL_ON);
DELAY(1000);
#define ATPHY_DBG_ADDR 0x1D
#define ATPHY_DBG_DATA 0x1E
/* Enable hibernation mode. */
ale_miibus_writereg(sc->ale_dev, sc->ale_phyaddr,
ATPHY_DBG_ADDR, 0x0B);
ale_miibus_writereg(sc->ale_dev, sc->ale_phyaddr,
ATPHY_DBG_DATA, 0xBC00);
/* Set Class A/B for all modes. */
ale_miibus_writereg(sc->ale_dev, sc->ale_phyaddr,
ATPHY_DBG_ADDR, 0x00);
ale_miibus_writereg(sc->ale_dev, sc->ale_phyaddr,
ATPHY_DBG_DATA, 0x02EF);
/* Enable 10BT power saving. */
ale_miibus_writereg(sc->ale_dev, sc->ale_phyaddr,
ATPHY_DBG_ADDR, 0x12);
ale_miibus_writereg(sc->ale_dev, sc->ale_phyaddr,
ATPHY_DBG_DATA, 0x4C04);
/* Adjust 1000T power. */
ale_miibus_writereg(sc->ale_dev, sc->ale_phyaddr,
ATPHY_DBG_ADDR, 0x04);
ale_miibus_writereg(sc->ale_dev, sc->ale_phyaddr,
ATPHY_DBG_ADDR, 0x8BBB);
/* 10BT center tap voltage. */
ale_miibus_writereg(sc->ale_dev, sc->ale_phyaddr,
ATPHY_DBG_ADDR, 0x05);
ale_miibus_writereg(sc->ale_dev, sc->ale_phyaddr,
ATPHY_DBG_ADDR, 0x2C46);
#undef ATPHY_DBG_ADDR
#undef ATPHY_DBG_DATA
DELAY(1000);
}
static int
ale_attach(device_t dev)
{
struct ale_softc *sc;
struct ifnet *ifp;
uint16_t burst;
int error, i, msic, msixc, pmc;
uint32_t rxf_len, txf_len;
error = 0;
sc = device_get_softc(dev);
sc->ale_dev = dev;
mtx_init(&sc->ale_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
MTX_DEF);
callout_init_mtx(&sc->ale_tick_ch, &sc->ale_mtx, 0);
TASK_INIT(&sc->ale_int_task, 0, ale_int_task, sc);
TASK_INIT(&sc->ale_link_task, 0, ale_link_task, sc);
/* Map the device. */
pci_enable_busmaster(dev);
sc->ale_res_spec = ale_res_spec_mem;
sc->ale_irq_spec = ale_irq_spec_legacy;
error = bus_alloc_resources(dev, sc->ale_res_spec, sc->ale_res);
if (error != 0) {
device_printf(dev, "cannot allocate memory resources.\n");
goto fail;
}
/* Set PHY address. */
sc->ale_phyaddr = ALE_PHY_ADDR;
/* Reset PHY. */
ale_phy_reset(sc);
/* Reset the ethernet controller. */
ale_reset(sc);
/* Get PCI and chip id/revision. */
sc->ale_rev = pci_get_revid(dev);
if (sc->ale_rev >= 0xF0) {
/* L2E Rev. B. AR8114 */
sc->ale_flags |= ALE_FLAG_FASTETHER;
} else {
if ((CSR_READ_4(sc, ALE_PHY_STATUS) & PHY_STATUS_100M) != 0) {
/* L1E AR8121 */
sc->ale_flags |= ALE_FLAG_JUMBO;
} else {
/* L2E Rev. A. AR8113 */
sc->ale_flags |= ALE_FLAG_FASTETHER;
}
}
/*
* All known controllers seems to require 4 bytes alignment
* of Tx buffers to make Tx checksum offload with custom
* checksum generation method work.
*/
sc->ale_flags |= ALE_FLAG_TXCSUM_BUG;
/*
* All known controllers seems to have issues on Rx checksum
* offload for fragmented IP datagrams.
*/
sc->ale_flags |= ALE_FLAG_RXCSUM_BUG;
/*
* Don't use Tx CMB. It is known to cause RRS update failure
* under certain circumstances. Typical phenomenon of the
* issue would be unexpected sequence number encountered in
* Rx handler.
*/
sc->ale_flags |= ALE_FLAG_TXCMB_BUG;
sc->ale_chip_rev = CSR_READ_4(sc, ALE_MASTER_CFG) >>
MASTER_CHIP_REV_SHIFT;
if (bootverbose) {
device_printf(dev, "PCI device revision : 0x%04x\n",
sc->ale_rev);
device_printf(dev, "Chip id/revision : 0x%04x\n",
sc->ale_chip_rev);
}
txf_len = CSR_READ_4(sc, ALE_SRAM_TX_FIFO_LEN);
rxf_len = CSR_READ_4(sc, ALE_SRAM_RX_FIFO_LEN);
/*
* Uninitialized hardware returns an invalid chip id/revision
* as well as 0xFFFFFFFF for Tx/Rx fifo length.
*/
if (sc->ale_chip_rev == 0xFFFF || txf_len == 0xFFFFFFFF ||
rxf_len == 0xFFFFFFF) {
device_printf(dev,"chip revision : 0x%04x, %u Tx FIFO "
"%u Rx FIFO -- not initialized?\n", sc->ale_chip_rev,
txf_len, rxf_len);
error = ENXIO;
goto fail;
}
device_printf(dev, "%u Tx FIFO, %u Rx FIFO\n", txf_len, rxf_len);
/* Allocate IRQ resources. */
msixc = pci_msix_count(dev);
msic = pci_msi_count(dev);
if (bootverbose) {
device_printf(dev, "MSIX count : %d\n", msixc);
device_printf(dev, "MSI count : %d\n", msic);
}
/* Prefer MSIX over MSI. */
if (msix_disable == 0 || msi_disable == 0) {
if (msix_disable == 0 && msixc == ALE_MSIX_MESSAGES &&
pci_alloc_msix(dev, &msixc) == 0) {
if (msic == ALE_MSIX_MESSAGES) {
device_printf(dev, "Using %d MSIX messages.\n",
msixc);
sc->ale_flags |= ALE_FLAG_MSIX;
sc->ale_irq_spec = ale_irq_spec_msix;
} else
pci_release_msi(dev);
}
if (msi_disable == 0 && (sc->ale_flags & ALE_FLAG_MSIX) == 0 &&
msic == ALE_MSI_MESSAGES &&
pci_alloc_msi(dev, &msic) == 0) {
if (msic == ALE_MSI_MESSAGES) {
device_printf(dev, "Using %d MSI messages.\n",
msic);
sc->ale_flags |= ALE_FLAG_MSI;
sc->ale_irq_spec = ale_irq_spec_msi;
} else
pci_release_msi(dev);
}
}
error = bus_alloc_resources(dev, sc->ale_irq_spec, sc->ale_irq);
if (error != 0) {
device_printf(dev, "cannot allocate IRQ resources.\n");
goto fail;
}
/* Get DMA parameters from PCIe device control register. */
if (pci_find_cap(dev, PCIY_EXPRESS, &i) == 0) {
sc->ale_flags |= ALE_FLAG_PCIE;
burst = pci_read_config(dev, i + 0x08, 2);
/* Max read request size. */
sc->ale_dma_rd_burst = ((burst >> 12) & 0x07) <<
DMA_CFG_RD_BURST_SHIFT;
/* Max payload size. */
sc->ale_dma_wr_burst = ((burst >> 5) & 0x07) <<
DMA_CFG_WR_BURST_SHIFT;
if (bootverbose) {
device_printf(dev, "Read request size : %d bytes.\n",
128 << ((burst >> 12) & 0x07));
device_printf(dev, "TLP payload size : %d bytes.\n",
128 << ((burst >> 5) & 0x07));
}
} else {
sc->ale_dma_rd_burst = DMA_CFG_RD_BURST_128;
sc->ale_dma_wr_burst = DMA_CFG_WR_BURST_128;
}
/* Create device sysctl node. */
ale_sysctl_node(sc);
if ((error = ale_dma_alloc(sc) != 0))
goto fail;
/* Load station address. */
ale_get_macaddr(sc);
ifp = sc->ale_ifp = if_alloc(IFT_ETHER);
if (ifp == NULL) {
device_printf(dev, "cannot allocate ifnet structure.\n");
error = ENXIO;
goto fail;
}
ifp->if_softc = sc;
if_initname(ifp, device_get_name(dev), device_get_unit(dev));
ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
ifp->if_ioctl = ale_ioctl;
ifp->if_start = ale_start;
ifp->if_init = ale_init;
ifp->if_snd.ifq_drv_maxlen = ALE_TX_RING_CNT - 1;
IFQ_SET_MAXLEN(&ifp->if_snd, ifp->if_snd.ifq_drv_maxlen);
IFQ_SET_READY(&ifp->if_snd);
ifp->if_capabilities = IFCAP_RXCSUM | IFCAP_TXCSUM | IFCAP_TSO4;
ifp->if_hwassist = ALE_CSUM_FEATURES | CSUM_TSO;
if (pci_find_cap(dev, PCIY_PMG, &pmc) == 0) {
sc->ale_flags |= ALE_FLAG_PMCAP;
ifp->if_capabilities |= IFCAP_WOL_MAGIC | IFCAP_WOL_MCAST;
}
ifp->if_capenable = ifp->if_capabilities;
/* Set up MII bus. */
error = mii_attach(dev, &sc->ale_miibus, ifp, ale_mediachange,
ale_mediastatus, BMSR_DEFCAPMASK, sc->ale_phyaddr, MII_OFFSET_ANY,
0);
if (error != 0) {
device_printf(dev, "attaching PHYs failed\n");
goto fail;
}
ether_ifattach(ifp, sc->ale_eaddr);
/* VLAN capability setup. */
ifp->if_capabilities |= IFCAP_VLAN_MTU | IFCAP_VLAN_HWTAGGING |
IFCAP_VLAN_HWCSUM | IFCAP_VLAN_HWTSO;
ifp->if_capenable = ifp->if_capabilities;
/*
* Even though controllers supported by ale(3) have Rx checksum
* offload bug the workaround for fragmented frames seemed to
* work so far. However it seems Rx checksum offload does not
* work under certain conditions. So disable Rx checksum offload
* until I find more clue about it but allow users to override it.
*/
ifp->if_capenable &= ~IFCAP_RXCSUM;
/* Tell the upper layer(s) we support long frames. */
ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header);
/* Create local taskq. */
sc->ale_tq = taskqueue_create_fast("ale_taskq", M_WAITOK,
taskqueue_thread_enqueue, &sc->ale_tq);
if (sc->ale_tq == NULL) {
device_printf(dev, "could not create taskqueue.\n");
ether_ifdetach(ifp);
error = ENXIO;
goto fail;
}
taskqueue_start_threads(&sc->ale_tq, 1, PI_NET, "%s taskq",
device_get_nameunit(sc->ale_dev));
if ((sc->ale_flags & ALE_FLAG_MSIX) != 0)
msic = ALE_MSIX_MESSAGES;
else if ((sc->ale_flags & ALE_FLAG_MSI) != 0)
msic = ALE_MSI_MESSAGES;
else
msic = 1;
for (i = 0; i < msic; i++) {
error = bus_setup_intr(dev, sc->ale_irq[i],
INTR_TYPE_NET | INTR_MPSAFE, ale_intr, NULL, sc,
&sc->ale_intrhand[i]);
if (error != 0)
break;
}
if (error != 0) {
device_printf(dev, "could not set up interrupt handler.\n");
taskqueue_free(sc->ale_tq);
sc->ale_tq = NULL;
ether_ifdetach(ifp);
goto fail;
}
fail:
if (error != 0)
ale_detach(dev);
return (error);
}
static int
ale_detach(device_t dev)
{
struct ale_softc *sc;
struct ifnet *ifp;
int i, msic;
sc = device_get_softc(dev);
ifp = sc->ale_ifp;
if (device_is_attached(dev)) {
ether_ifdetach(ifp);
ALE_LOCK(sc);
ale_stop(sc);
ALE_UNLOCK(sc);
callout_drain(&sc->ale_tick_ch);
taskqueue_drain(sc->ale_tq, &sc->ale_int_task);
taskqueue_drain(taskqueue_swi, &sc->ale_link_task);
}
if (sc->ale_tq != NULL) {
taskqueue_drain(sc->ale_tq, &sc->ale_int_task);
taskqueue_free(sc->ale_tq);
sc->ale_tq = NULL;
}
if (sc->ale_miibus != NULL) {
device_delete_child(dev, sc->ale_miibus);
sc->ale_miibus = NULL;
}
bus_generic_detach(dev);
ale_dma_free(sc);
if (ifp != NULL) {
if_free(ifp);
sc->ale_ifp = NULL;
}
if ((sc->ale_flags & ALE_FLAG_MSIX) != 0)
msic = ALE_MSIX_MESSAGES;
else if ((sc->ale_flags & ALE_FLAG_MSI) != 0)
msic = ALE_MSI_MESSAGES;
else
msic = 1;
for (i = 0; i < msic; i++) {
if (sc->ale_intrhand[i] != NULL) {
bus_teardown_intr(dev, sc->ale_irq[i],
sc->ale_intrhand[i]);
sc->ale_intrhand[i] = NULL;
}
}
bus_release_resources(dev, sc->ale_irq_spec, sc->ale_irq);
if ((sc->ale_flags & (ALE_FLAG_MSI | ALE_FLAG_MSIX)) != 0)
pci_release_msi(dev);
bus_release_resources(dev, sc->ale_res_spec, sc->ale_res);
mtx_destroy(&sc->ale_mtx);
return (0);
}
#define ALE_SYSCTL_STAT_ADD32(c, h, n, p, d) \
SYSCTL_ADD_UINT(c, h, OID_AUTO, n, CTLFLAG_RD, p, 0, d)
#if __FreeBSD_version >= 900030
#define ALE_SYSCTL_STAT_ADD64(c, h, n, p, d) \
SYSCTL_ADD_UQUAD(c, h, OID_AUTO, n, CTLFLAG_RD, p, d)
#elif __FreeBSD_version > 800000
#define ALE_SYSCTL_STAT_ADD64(c, h, n, p, d) \
SYSCTL_ADD_QUAD(c, h, OID_AUTO, n, CTLFLAG_RD, p, d)
#else
#define ALE_SYSCTL_STAT_ADD64(c, h, n, p, d) \
SYSCTL_ADD_ULONG(c, h, OID_AUTO, n, CTLFLAG_RD, p, d)
#endif
static void
ale_sysctl_node(struct ale_softc *sc)
{
struct sysctl_ctx_list *ctx;
struct sysctl_oid_list *child, *parent;
struct sysctl_oid *tree;
struct ale_hw_stats *stats;
int error;
stats = &sc->ale_stats;
ctx = device_get_sysctl_ctx(sc->ale_dev);
child = SYSCTL_CHILDREN(device_get_sysctl_tree(sc->ale_dev));
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "int_rx_mod",
CTLTYPE_INT | CTLFLAG_RW, &sc->ale_int_rx_mod, 0,
sysctl_hw_ale_int_mod, "I", "ale Rx interrupt moderation");
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "int_tx_mod",
CTLTYPE_INT | CTLFLAG_RW, &sc->ale_int_tx_mod, 0,
sysctl_hw_ale_int_mod, "I", "ale Tx interrupt moderation");
/* Pull in device tunables. */
sc->ale_int_rx_mod = ALE_IM_RX_TIMER_DEFAULT;
error = resource_int_value(device_get_name(sc->ale_dev),
device_get_unit(sc->ale_dev), "int_rx_mod", &sc->ale_int_rx_mod);
if (error == 0) {
if (sc->ale_int_rx_mod < ALE_IM_TIMER_MIN ||
sc->ale_int_rx_mod > ALE_IM_TIMER_MAX) {
device_printf(sc->ale_dev, "int_rx_mod value out of "
"range; using default: %d\n",
ALE_IM_RX_TIMER_DEFAULT);
sc->ale_int_rx_mod = ALE_IM_RX_TIMER_DEFAULT;
}
}
sc->ale_int_tx_mod = ALE_IM_TX_TIMER_DEFAULT;
error = resource_int_value(device_get_name(sc->ale_dev),
device_get_unit(sc->ale_dev), "int_tx_mod", &sc->ale_int_tx_mod);
if (error == 0) {
if (sc->ale_int_tx_mod < ALE_IM_TIMER_MIN ||
sc->ale_int_tx_mod > ALE_IM_TIMER_MAX) {
device_printf(sc->ale_dev, "int_tx_mod value out of "
"range; using default: %d\n",
ALE_IM_TX_TIMER_DEFAULT);
sc->ale_int_tx_mod = ALE_IM_TX_TIMER_DEFAULT;
}
}
SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "process_limit",
CTLTYPE_INT | CTLFLAG_RW, &sc->ale_process_limit, 0,
sysctl_hw_ale_proc_limit, "I",
"max number of Rx events to process");
/* Pull in device tunables. */
sc->ale_process_limit = ALE_PROC_DEFAULT;
error = resource_int_value(device_get_name(sc->ale_dev),
device_get_unit(sc->ale_dev), "process_limit",
&sc->ale_process_limit);
if (error == 0) {
if (sc->ale_process_limit < ALE_PROC_MIN ||
sc->ale_process_limit > ALE_PROC_MAX) {
device_printf(sc->ale_dev,
"process_limit value out of range; "
"using default: %d\n", ALE_PROC_DEFAULT);
sc->ale_process_limit = ALE_PROC_DEFAULT;
}
}
/* Misc statistics. */
ALE_SYSCTL_STAT_ADD32(ctx, child, "reset_brk_seq",
&stats->reset_brk_seq,
"Controller resets due to broken Rx sequnce number");
tree = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "stats", CTLFLAG_RD,
NULL, "ATE statistics");
parent = SYSCTL_CHILDREN(tree);
/* Rx statistics. */
tree = SYSCTL_ADD_NODE(ctx, parent, OID_AUTO, "rx", CTLFLAG_RD,
NULL, "Rx MAC statistics");
child = SYSCTL_CHILDREN(tree);
ALE_SYSCTL_STAT_ADD32(ctx, child, "good_frames",
&stats->rx_frames, "Good frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "good_bcast_frames",
&stats->rx_bcast_frames, "Good broadcast frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "good_mcast_frames",
&stats->rx_mcast_frames, "Good multicast frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "pause_frames",
&stats->rx_pause_frames, "Pause control frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "control_frames",
&stats->rx_control_frames, "Control frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "crc_errs",
&stats->rx_crcerrs, "CRC errors");
ALE_SYSCTL_STAT_ADD32(ctx, child, "len_errs",
&stats->rx_lenerrs, "Frames with length mismatched");
ALE_SYSCTL_STAT_ADD64(ctx, child, "good_octets",
&stats->rx_bytes, "Good octets");
ALE_SYSCTL_STAT_ADD64(ctx, child, "good_bcast_octets",
&stats->rx_bcast_bytes, "Good broadcast octets");
ALE_SYSCTL_STAT_ADD64(ctx, child, "good_mcast_octets",
&stats->rx_mcast_bytes, "Good multicast octets");
ALE_SYSCTL_STAT_ADD32(ctx, child, "runts",
&stats->rx_runts, "Too short frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "fragments",
&stats->rx_fragments, "Fragmented frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "frames_64",
&stats->rx_pkts_64, "64 bytes frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "frames_65_127",
&stats->rx_pkts_65_127, "65 to 127 bytes frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "frames_128_255",
&stats->rx_pkts_128_255, "128 to 255 bytes frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "frames_256_511",
&stats->rx_pkts_256_511, "256 to 511 bytes frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "frames_512_1023",
&stats->rx_pkts_512_1023, "512 to 1023 bytes frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "frames_1024_1518",
&stats->rx_pkts_1024_1518, "1024 to 1518 bytes frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "frames_1519_max",
&stats->rx_pkts_1519_max, "1519 to max frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "trunc_errs",
&stats->rx_pkts_truncated, "Truncated frames due to MTU size");
ALE_SYSCTL_STAT_ADD32(ctx, child, "fifo_oflows",
&stats->rx_fifo_oflows, "FIFO overflows");
ALE_SYSCTL_STAT_ADD32(ctx, child, "rrs_errs",
&stats->rx_rrs_errs, "Return status write-back errors");
ALE_SYSCTL_STAT_ADD32(ctx, child, "align_errs",
&stats->rx_alignerrs, "Alignment errors");
ALE_SYSCTL_STAT_ADD32(ctx, child, "filtered",
&stats->rx_pkts_filtered,
"Frames dropped due to address filtering");
/* Tx statistics. */
tree = SYSCTL_ADD_NODE(ctx, parent, OID_AUTO, "tx", CTLFLAG_RD,
NULL, "Tx MAC statistics");
child = SYSCTL_CHILDREN(tree);
ALE_SYSCTL_STAT_ADD32(ctx, child, "good_frames",
&stats->tx_frames, "Good frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "good_bcast_frames",
&stats->tx_bcast_frames, "Good broadcast frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "good_mcast_frames",
&stats->tx_mcast_frames, "Good multicast frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "pause_frames",
&stats->tx_pause_frames, "Pause control frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "control_frames",
&stats->tx_control_frames, "Control frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "excess_defers",
&stats->tx_excess_defer, "Frames with excessive derferrals");
ALE_SYSCTL_STAT_ADD32(ctx, child, "defers",
&stats->tx_excess_defer, "Frames with derferrals");
ALE_SYSCTL_STAT_ADD64(ctx, child, "good_octets",
&stats->tx_bytes, "Good octets");
ALE_SYSCTL_STAT_ADD64(ctx, child, "good_bcast_octets",
&stats->tx_bcast_bytes, "Good broadcast octets");
ALE_SYSCTL_STAT_ADD64(ctx, child, "good_mcast_octets",
&stats->tx_mcast_bytes, "Good multicast octets");
ALE_SYSCTL_STAT_ADD32(ctx, child, "frames_64",
&stats->tx_pkts_64, "64 bytes frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "frames_65_127",
&stats->tx_pkts_65_127, "65 to 127 bytes frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "frames_128_255",
&stats->tx_pkts_128_255, "128 to 255 bytes frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "frames_256_511",
&stats->tx_pkts_256_511, "256 to 511 bytes frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "frames_512_1023",
&stats->tx_pkts_512_1023, "512 to 1023 bytes frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "frames_1024_1518",
&stats->tx_pkts_1024_1518, "1024 to 1518 bytes frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "frames_1519_max",
&stats->tx_pkts_1519_max, "1519 to max frames");
ALE_SYSCTL_STAT_ADD32(ctx, child, "single_colls",
&stats->tx_single_colls, "Single collisions");
ALE_SYSCTL_STAT_ADD32(ctx, child, "multi_colls",
&stats->tx_multi_colls, "Multiple collisions");
ALE_SYSCTL_STAT_ADD32(ctx, child, "late_colls",
&stats->tx_late_colls, "Late collisions");
ALE_SYSCTL_STAT_ADD32(ctx, child, "excess_colls",
&stats->tx_excess_colls, "Excessive collisions");
ALE_SYSCTL_STAT_ADD32(ctx, child, "abort",
&stats->tx_abort, "Aborted frames due to Excessive collisions");
ALE_SYSCTL_STAT_ADD32(ctx, child, "underruns",
&stats->tx_underrun, "FIFO underruns");
ALE_SYSCTL_STAT_ADD32(ctx, child, "desc_underruns",
&stats->tx_desc_underrun, "Descriptor write-back errors");
ALE_SYSCTL_STAT_ADD32(ctx, child, "len_errs",
&stats->tx_lenerrs, "Frames with length mismatched");
ALE_SYSCTL_STAT_ADD32(ctx, child, "trunc_errs",
&stats->tx_pkts_truncated, "Truncated frames due to MTU size");
}
#undef ALE_SYSCTL_STAT_ADD32
#undef ALE_SYSCTL_STAT_ADD64
struct ale_dmamap_arg {
bus_addr_t ale_busaddr;
};
static void
ale_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nsegs, int error)
{
struct ale_dmamap_arg *ctx;
if (error != 0)
return;
KASSERT(nsegs == 1, ("%s: %d segments returned!", __func__, nsegs));
ctx = (struct ale_dmamap_arg *)arg;
ctx->ale_busaddr = segs[0].ds_addr;
}
/*
* Tx descriptors/RXF0/CMB DMA blocks share ALE_DESC_ADDR_HI register
* which specifies high address region of DMA blocks. Therefore these
* blocks should have the same high address of given 4GB address
* space(i.e. crossing 4GB boundary is not allowed).
*/
static int
ale_check_boundary(struct ale_softc *sc)
{
bus_addr_t rx_cmb_end[ALE_RX_PAGES], tx_cmb_end;
bus_addr_t rx_page_end[ALE_RX_PAGES], tx_ring_end;
rx_page_end[0] = sc->ale_cdata.ale_rx_page[0].page_paddr +
sc->ale_pagesize;
rx_page_end[1] = sc->ale_cdata.ale_rx_page[1].page_paddr +
sc->ale_pagesize;
tx_ring_end = sc->ale_cdata.ale_tx_ring_paddr + ALE_TX_RING_SZ;
tx_cmb_end = sc->ale_cdata.ale_tx_cmb_paddr + ALE_TX_CMB_SZ;
rx_cmb_end[0] = sc->ale_cdata.ale_rx_page[0].cmb_paddr + ALE_RX_CMB_SZ;
rx_cmb_end[1] = sc->ale_cdata.ale_rx_page[1].cmb_paddr + ALE_RX_CMB_SZ;
if ((ALE_ADDR_HI(tx_ring_end) !=
ALE_ADDR_HI(sc->ale_cdata.ale_tx_ring_paddr)) ||
(ALE_ADDR_HI(rx_page_end[0]) !=
ALE_ADDR_HI(sc->ale_cdata.ale_rx_page[0].page_paddr)) ||
(ALE_ADDR_HI(rx_page_end[1]) !=
ALE_ADDR_HI(sc->ale_cdata.ale_rx_page[1].page_paddr)) ||
(ALE_ADDR_HI(tx_cmb_end) !=
ALE_ADDR_HI(sc->ale_cdata.ale_tx_cmb_paddr)) ||
(ALE_ADDR_HI(rx_cmb_end[0]) !=
ALE_ADDR_HI(sc->ale_cdata.ale_rx_page[0].cmb_paddr)) ||
(ALE_ADDR_HI(rx_cmb_end[1]) !=
ALE_ADDR_HI(sc->ale_cdata.ale_rx_page[1].cmb_paddr)))
return (EFBIG);
if ((ALE_ADDR_HI(tx_ring_end) != ALE_ADDR_HI(rx_page_end[0])) ||
(ALE_ADDR_HI(tx_ring_end) != ALE_ADDR_HI(rx_page_end[1])) ||
(ALE_ADDR_HI(tx_ring_end) != ALE_ADDR_HI(rx_cmb_end[0])) ||
(ALE_ADDR_HI(tx_ring_end) != ALE_ADDR_HI(rx_cmb_end[1])) ||
(ALE_ADDR_HI(tx_ring_end) != ALE_ADDR_HI(tx_cmb_end)))
return (EFBIG);
return (0);
}
static int
ale_dma_alloc(struct ale_softc *sc)
{
struct ale_txdesc *txd;
bus_addr_t lowaddr;
struct ale_dmamap_arg ctx;
int error, guard_size, i;
if ((sc->ale_flags & ALE_FLAG_JUMBO) != 0)
guard_size = ALE_JUMBO_FRAMELEN;
else
guard_size = ALE_MAX_FRAMELEN;
sc->ale_pagesize = roundup(guard_size + ALE_RX_PAGE_SZ,
ALE_RX_PAGE_ALIGN);
lowaddr = BUS_SPACE_MAXADDR;
again:
/* Create parent DMA tag. */
error = bus_dma_tag_create(
bus_get_dma_tag(sc->ale_dev), /* parent */
1, 0, /* alignment, boundary */
lowaddr, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
BUS_SPACE_MAXSIZE_32BIT, /* maxsize */
0, /* nsegments */
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->ale_cdata.ale_parent_tag);
if (error != 0) {
device_printf(sc->ale_dev,
"could not create parent DMA tag.\n");
goto fail;
}
/* Create DMA tag for Tx descriptor ring. */
error = bus_dma_tag_create(
sc->ale_cdata.ale_parent_tag, /* parent */
ALE_TX_RING_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
ALE_TX_RING_SZ, /* maxsize */
1, /* nsegments */
ALE_TX_RING_SZ, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->ale_cdata.ale_tx_ring_tag);
if (error != 0) {
device_printf(sc->ale_dev,
"could not create Tx ring DMA tag.\n");
goto fail;
}
/* Create DMA tag for Rx pages. */
for (i = 0; i < ALE_RX_PAGES; i++) {
error = bus_dma_tag_create(
sc->ale_cdata.ale_parent_tag, /* parent */
ALE_RX_PAGE_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
sc->ale_pagesize, /* maxsize */
1, /* nsegments */
sc->ale_pagesize, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->ale_cdata.ale_rx_page[i].page_tag);
if (error != 0) {
device_printf(sc->ale_dev,
"could not create Rx page %d DMA tag.\n", i);
goto fail;
}
}
/* Create DMA tag for Tx coalescing message block. */
error = bus_dma_tag_create(
sc->ale_cdata.ale_parent_tag, /* parent */
ALE_CMB_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
ALE_TX_CMB_SZ, /* maxsize */
1, /* nsegments */
ALE_TX_CMB_SZ, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->ale_cdata.ale_tx_cmb_tag);
if (error != 0) {
device_printf(sc->ale_dev,
"could not create Tx CMB DMA tag.\n");
goto fail;
}
/* Create DMA tag for Rx coalescing message block. */
for (i = 0; i < ALE_RX_PAGES; i++) {
error = bus_dma_tag_create(
sc->ale_cdata.ale_parent_tag, /* parent */
ALE_CMB_ALIGN, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
ALE_RX_CMB_SZ, /* maxsize */
1, /* nsegments */
ALE_RX_CMB_SZ, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->ale_cdata.ale_rx_page[i].cmb_tag);
if (error != 0) {
device_printf(sc->ale_dev,
"could not create Rx page %d CMB DMA tag.\n", i);
goto fail;
}
}
/* Allocate DMA'able memory and load the DMA map for Tx ring. */
error = bus_dmamem_alloc(sc->ale_cdata.ale_tx_ring_tag,
(void **)&sc->ale_cdata.ale_tx_ring,
BUS_DMA_WAITOK | BUS_DMA_ZERO | BUS_DMA_COHERENT,
&sc->ale_cdata.ale_tx_ring_map);
if (error != 0) {
device_printf(sc->ale_dev,
"could not allocate DMA'able memory for Tx ring.\n");
goto fail;
}
ctx.ale_busaddr = 0;
error = bus_dmamap_load(sc->ale_cdata.ale_tx_ring_tag,
sc->ale_cdata.ale_tx_ring_map, sc->ale_cdata.ale_tx_ring,
ALE_TX_RING_SZ, ale_dmamap_cb, &ctx, 0);
if (error != 0 || ctx.ale_busaddr == 0) {
device_printf(sc->ale_dev,
"could not load DMA'able memory for Tx ring.\n");
goto fail;
}
sc->ale_cdata.ale_tx_ring_paddr = ctx.ale_busaddr;
/* Rx pages. */
for (i = 0; i < ALE_RX_PAGES; i++) {
error = bus_dmamem_alloc(sc->ale_cdata.ale_rx_page[i].page_tag,
(void **)&sc->ale_cdata.ale_rx_page[i].page_addr,
BUS_DMA_WAITOK | BUS_DMA_ZERO | BUS_DMA_COHERENT,
&sc->ale_cdata.ale_rx_page[i].page_map);
if (error != 0) {
device_printf(sc->ale_dev,
"could not allocate DMA'able memory for "
"Rx page %d.\n", i);
goto fail;
}
ctx.ale_busaddr = 0;
error = bus_dmamap_load(sc->ale_cdata.ale_rx_page[i].page_tag,
sc->ale_cdata.ale_rx_page[i].page_map,
sc->ale_cdata.ale_rx_page[i].page_addr,
sc->ale_pagesize, ale_dmamap_cb, &ctx, 0);
if (error != 0 || ctx.ale_busaddr == 0) {
device_printf(sc->ale_dev,
"could not load DMA'able memory for "
"Rx page %d.\n", i);
goto fail;
}
sc->ale_cdata.ale_rx_page[i].page_paddr = ctx.ale_busaddr;
}
/* Tx CMB. */
error = bus_dmamem_alloc(sc->ale_cdata.ale_tx_cmb_tag,
(void **)&sc->ale_cdata.ale_tx_cmb,
BUS_DMA_WAITOK | BUS_DMA_ZERO | BUS_DMA_COHERENT,
&sc->ale_cdata.ale_tx_cmb_map);
if (error != 0) {
device_printf(sc->ale_dev,
"could not allocate DMA'able memory for Tx CMB.\n");
goto fail;
}
ctx.ale_busaddr = 0;
error = bus_dmamap_load(sc->ale_cdata.ale_tx_cmb_tag,
sc->ale_cdata.ale_tx_cmb_map, sc->ale_cdata.ale_tx_cmb,
ALE_TX_CMB_SZ, ale_dmamap_cb, &ctx, 0);
if (error != 0 || ctx.ale_busaddr == 0) {
device_printf(sc->ale_dev,
"could not load DMA'able memory for Tx CMB.\n");
goto fail;
}
sc->ale_cdata.ale_tx_cmb_paddr = ctx.ale_busaddr;
/* Rx CMB. */
for (i = 0; i < ALE_RX_PAGES; i++) {
error = bus_dmamem_alloc(sc->ale_cdata.ale_rx_page[i].cmb_tag,
(void **)&sc->ale_cdata.ale_rx_page[i].cmb_addr,
BUS_DMA_WAITOK | BUS_DMA_ZERO | BUS_DMA_COHERENT,
&sc->ale_cdata.ale_rx_page[i].cmb_map);
if (error != 0) {
device_printf(sc->ale_dev, "could not allocate "
"DMA'able memory for Rx page %d CMB.\n", i);
goto fail;
}
ctx.ale_busaddr = 0;
error = bus_dmamap_load(sc->ale_cdata.ale_rx_page[i].cmb_tag,
sc->ale_cdata.ale_rx_page[i].cmb_map,
sc->ale_cdata.ale_rx_page[i].cmb_addr,
ALE_RX_CMB_SZ, ale_dmamap_cb, &ctx, 0);
if (error != 0 || ctx.ale_busaddr == 0) {
device_printf(sc->ale_dev, "could not load DMA'able "
"memory for Rx page %d CMB.\n", i);
goto fail;
}
sc->ale_cdata.ale_rx_page[i].cmb_paddr = ctx.ale_busaddr;
}
/*
* Tx descriptors/RXF0/CMB DMA blocks share the same
* high address region of 64bit DMA address space.
*/
if (lowaddr != BUS_SPACE_MAXADDR_32BIT &&
(error = ale_check_boundary(sc)) != 0) {
device_printf(sc->ale_dev, "4GB boundary crossed, "
"switching to 32bit DMA addressing mode.\n");
ale_dma_free(sc);
/*
* Limit max allowable DMA address space to 32bit
* and try again.
*/
lowaddr = BUS_SPACE_MAXADDR_32BIT;
goto again;
}
/*
* Create Tx buffer parent tag.
* AR81xx allows 64bit DMA addressing of Tx buffers so it
* needs separate parent DMA tag as parent DMA address space
* could be restricted to be within 32bit address space by
* 4GB boundary crossing.
*/
error = bus_dma_tag_create(
bus_get_dma_tag(sc->ale_dev), /* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
BUS_SPACE_MAXSIZE_32BIT, /* maxsize */
0, /* nsegments */
BUS_SPACE_MAXSIZE_32BIT, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->ale_cdata.ale_buffer_tag);
if (error != 0) {
device_printf(sc->ale_dev,
"could not create parent buffer DMA tag.\n");
goto fail;
}
/* Create DMA tag for Tx buffers. */
error = bus_dma_tag_create(
sc->ale_cdata.ale_buffer_tag, /* parent */
1, 0, /* alignment, boundary */
BUS_SPACE_MAXADDR, /* lowaddr */
BUS_SPACE_MAXADDR, /* highaddr */
NULL, NULL, /* filter, filterarg */
ALE_TSO_MAXSIZE, /* maxsize */
ALE_MAXTXSEGS, /* nsegments */
ALE_TSO_MAXSEGSIZE, /* maxsegsize */
0, /* flags */
NULL, NULL, /* lockfunc, lockarg */
&sc->ale_cdata.ale_tx_tag);
if (error != 0) {
device_printf(sc->ale_dev, "could not create Tx DMA tag.\n");
goto fail;
}
/* Create DMA maps for Tx buffers. */
for (i = 0; i < ALE_TX_RING_CNT; i++) {
txd = &sc->ale_cdata.ale_txdesc[i];
txd->tx_m = NULL;
txd->tx_dmamap = NULL;
error = bus_dmamap_create(sc->ale_cdata.ale_tx_tag, 0,
&txd->tx_dmamap);
if (error != 0) {
device_printf(sc->ale_dev,
"could not create Tx dmamap.\n");
goto fail;
}
}
fail:
return (error);
}
static void
ale_dma_free(struct ale_softc *sc)
{
struct ale_txdesc *txd;
int i;
/* Tx buffers. */
if (sc->ale_cdata.ale_tx_tag != NULL) {
for (i = 0; i < ALE_TX_RING_CNT; i++) {
txd = &sc->ale_cdata.ale_txdesc[i];
if (txd->tx_dmamap != NULL) {
bus_dmamap_destroy(sc->ale_cdata.ale_tx_tag,
txd->tx_dmamap);
txd->tx_dmamap = NULL;
}
}
bus_dma_tag_destroy(sc->ale_cdata.ale_tx_tag);
sc->ale_cdata.ale_tx_tag = NULL;
}
/* Tx descriptor ring. */
if (sc->ale_cdata.ale_tx_ring_tag != NULL) {
if (sc->ale_cdata.ale_tx_ring_map != NULL)
bus_dmamap_unload(sc->ale_cdata.ale_tx_ring_tag,
sc->ale_cdata.ale_tx_ring_map);
if (sc->ale_cdata.ale_tx_ring_map != NULL &&
sc->ale_cdata.ale_tx_ring != NULL)
bus_dmamem_free(sc->ale_cdata.ale_tx_ring_tag,
sc->ale_cdata.ale_tx_ring,
sc->ale_cdata.ale_tx_ring_map);
sc->ale_cdata.ale_tx_ring = NULL;
sc->ale_cdata.ale_tx_ring_map = NULL;
bus_dma_tag_destroy(sc->ale_cdata.ale_tx_ring_tag);
sc->ale_cdata.ale_tx_ring_tag = NULL;
}
/* Rx page block. */
for (i = 0; i < ALE_RX_PAGES; i++) {
if (sc->ale_cdata.ale_rx_page[i].page_tag != NULL) {
if (sc->ale_cdata.ale_rx_page[i].page_map != NULL)
bus_dmamap_unload(
sc->ale_cdata.ale_rx_page[i].page_tag,
sc->ale_cdata.ale_rx_page[i].page_map);
if (sc->ale_cdata.ale_rx_page[i].page_map != NULL &&
sc->ale_cdata.ale_rx_page[i].page_addr != NULL)
bus_dmamem_free(
sc->ale_cdata.ale_rx_page[i].page_tag,
sc->ale_cdata.ale_rx_page[i].page_addr,
sc->ale_cdata.ale_rx_page[i].page_map);
sc->ale_cdata.ale_rx_page[i].page_addr = NULL;
sc->ale_cdata.ale_rx_page[i].page_map = NULL;
bus_dma_tag_destroy(
sc->ale_cdata.ale_rx_page[i].page_tag);
sc->ale_cdata.ale_rx_page[i].page_tag = NULL;
}
}
/* Rx CMB. */
for (i = 0; i < ALE_RX_PAGES; i++) {
if (sc->ale_cdata.ale_rx_page[i].cmb_tag != NULL) {
if (sc->ale_cdata.ale_rx_page[i].cmb_map != NULL)
bus_dmamap_unload(
sc->ale_cdata.ale_rx_page[i].cmb_tag,
sc->ale_cdata.ale_rx_page[i].cmb_map);
if (sc->ale_cdata.ale_rx_page[i].cmb_map != NULL &&
sc->ale_cdata.ale_rx_page[i].cmb_addr != NULL)
bus_dmamem_free(
sc->ale_cdata.ale_rx_page[i].cmb_tag,
sc->ale_cdata.ale_rx_page[i].cmb_addr,
sc->ale_cdata.ale_rx_page[i].cmb_map);
sc->ale_cdata.ale_rx_page[i].cmb_addr = NULL;
sc->ale_cdata.ale_rx_page[i].cmb_map = NULL;
bus_dma_tag_destroy(
sc->ale_cdata.ale_rx_page[i].cmb_tag);
sc->ale_cdata.ale_rx_page[i].cmb_tag = NULL;
}
}
/* Tx CMB. */
if (sc->ale_cdata.ale_tx_cmb_tag != NULL) {
if (sc->ale_cdata.ale_tx_cmb_map != NULL)
bus_dmamap_unload(sc->ale_cdata.ale_tx_cmb_tag,
sc->ale_cdata.ale_tx_cmb_map);
if (sc->ale_cdata.ale_tx_cmb_map != NULL &&
sc->ale_cdata.ale_tx_cmb != NULL)
bus_dmamem_free(sc->ale_cdata.ale_tx_cmb_tag,
sc->ale_cdata.ale_tx_cmb,
sc->ale_cdata.ale_tx_cmb_map);
sc->ale_cdata.ale_tx_cmb = NULL;
sc->ale_cdata.ale_tx_cmb_map = NULL;
bus_dma_tag_destroy(sc->ale_cdata.ale_tx_cmb_tag);
sc->ale_cdata.ale_tx_cmb_tag = NULL;
}
if (sc->ale_cdata.ale_buffer_tag != NULL) {
bus_dma_tag_destroy(sc->ale_cdata.ale_buffer_tag);
sc->ale_cdata.ale_buffer_tag = NULL;
}
if (sc->ale_cdata.ale_parent_tag != NULL) {
bus_dma_tag_destroy(sc->ale_cdata.ale_parent_tag);
sc->ale_cdata.ale_parent_tag = NULL;
}
}
static int
ale_shutdown(device_t dev)
{
return (ale_suspend(dev));
}
/*
* Note, this driver resets the link speed to 10/100Mbps by
* restarting auto-negotiation in suspend/shutdown phase but we
* don't know whether that auto-negotiation would succeed or not
* as driver has no control after powering off/suspend operation.
* If the renegotiation fail WOL may not work. Running at 1Gbps
* will draw more power than 375mA at 3.3V which is specified in
* PCI specification and that would result in complete
* shutdowning power to ethernet controller.
*
* TODO
* Save current negotiated media speed/duplex/flow-control to
* softc and restore the same link again after resuming. PHY
* handling such as power down/resetting to 100Mbps may be better
* handled in suspend method in phy driver.
*/
static void
ale_setlinkspeed(struct ale_softc *sc)
{
struct mii_data *mii;
int aneg, i;
mii = device_get_softc(sc->ale_miibus);
mii_pollstat(mii);
aneg = 0;
if ((mii->mii_media_status & (IFM_ACTIVE | IFM_AVALID)) ==
(IFM_ACTIVE | IFM_AVALID)) {
switch IFM_SUBTYPE(mii->mii_media_active) {
case IFM_10_T:
case IFM_100_TX:
return;
case IFM_1000_T:
aneg++;
break;
default:
break;
}
}
ale_miibus_writereg(sc->ale_dev, sc->ale_phyaddr, MII_100T2CR, 0);
ale_miibus_writereg(sc->ale_dev, sc->ale_phyaddr,
MII_ANAR, ANAR_TX_FD | ANAR_TX | ANAR_10_FD | ANAR_10 | ANAR_CSMA);
ale_miibus_writereg(sc->ale_dev, sc->ale_phyaddr,
MII_BMCR, BMCR_RESET | BMCR_AUTOEN | BMCR_STARTNEG);
DELAY(1000);
if (aneg != 0) {
/*
* Poll link state until ale(4) get a 10/100Mbps link.
*/
for (i = 0; i < MII_ANEGTICKS_GIGE; i++) {
mii_pollstat(mii);
if ((mii->mii_media_status & (IFM_ACTIVE | IFM_AVALID))
== (IFM_ACTIVE | IFM_AVALID)) {
switch (IFM_SUBTYPE(
mii->mii_media_active)) {
case IFM_10_T:
case IFM_100_TX:
ale_mac_config(sc);
return;
default:
break;
}
}
ALE_UNLOCK(sc);
pause("alelnk", hz);
ALE_LOCK(sc);
}
if (i == MII_ANEGTICKS_GIGE)
device_printf(sc->ale_dev,
"establishing a link failed, WOL may not work!");
}
/*
* No link, force MAC to have 100Mbps, full-duplex link.
* This is the last resort and may/may not work.
*/
mii->mii_media_status = IFM_AVALID | IFM_ACTIVE;
mii->mii_media_active = IFM_ETHER | IFM_100_TX | IFM_FDX;
ale_mac_config(sc);
}
static void
ale_setwol(struct ale_softc *sc)
{
struct ifnet *ifp;
uint32_t reg, pmcs;
uint16_t pmstat;
int pmc;
ALE_LOCK_ASSERT(sc);
if (pci_find_cap(sc->ale_dev, PCIY_PMG, &pmc) != 0) {
/* Disable WOL. */
CSR_WRITE_4(sc, ALE_WOL_CFG, 0);
reg = CSR_READ_4(sc, ALE_PCIE_PHYMISC);
reg |= PCIE_PHYMISC_FORCE_RCV_DET;
CSR_WRITE_4(sc, ALE_PCIE_PHYMISC, reg);
/* Force PHY power down. */
CSR_WRITE_2(sc, ALE_GPHY_CTRL,
GPHY_CTRL_EXT_RESET | GPHY_CTRL_HIB_EN |
GPHY_CTRL_HIB_PULSE | GPHY_CTRL_PHY_PLL_ON |
GPHY_CTRL_SEL_ANA_RESET | GPHY_CTRL_PHY_IDDQ |
GPHY_CTRL_PCLK_SEL_DIS | GPHY_CTRL_PWDOWN_HW);
return;
}
ifp = sc->ale_ifp;
if ((ifp->if_capenable & IFCAP_WOL) != 0) {
if ((sc->ale_flags & ALE_FLAG_FASTETHER) == 0)
ale_setlinkspeed(sc);
}
pmcs = 0;
if ((ifp->if_capenable & IFCAP_WOL_MAGIC) != 0)
pmcs |= WOL_CFG_MAGIC | WOL_CFG_MAGIC_ENB;
CSR_WRITE_4(sc, ALE_WOL_CFG, pmcs);
reg = CSR_READ_4(sc, ALE_MAC_CFG);
reg &= ~(MAC_CFG_DBG | MAC_CFG_PROMISC | MAC_CFG_ALLMULTI |
MAC_CFG_BCAST);
if ((ifp->if_capenable & IFCAP_WOL_MCAST) != 0)
reg |= MAC_CFG_ALLMULTI | MAC_CFG_BCAST;
if ((ifp->if_capenable & IFCAP_WOL) != 0)
reg |= MAC_CFG_RX_ENB;
CSR_WRITE_4(sc, ALE_MAC_CFG, reg);
if ((ifp->if_capenable & IFCAP_WOL) == 0) {
/* WOL disabled, PHY power down. */
reg = CSR_READ_4(sc, ALE_PCIE_PHYMISC);
reg |= PCIE_PHYMISC_FORCE_RCV_DET;
CSR_WRITE_4(sc, ALE_PCIE_PHYMISC, reg);
CSR_WRITE_2(sc, ALE_GPHY_CTRL,
GPHY_CTRL_EXT_RESET | GPHY_CTRL_HIB_EN |
GPHY_CTRL_HIB_PULSE | GPHY_CTRL_SEL_ANA_RESET |
GPHY_CTRL_PHY_IDDQ | GPHY_CTRL_PCLK_SEL_DIS |
GPHY_CTRL_PWDOWN_HW);
}
/* Request PME. */
pmstat = pci_read_config(sc->ale_dev, pmc + PCIR_POWER_STATUS, 2);
pmstat &= ~(PCIM_PSTAT_PME | PCIM_PSTAT_PMEENABLE);
if ((ifp->if_capenable & IFCAP_WOL) != 0)
pmstat |= PCIM_PSTAT_PME | PCIM_PSTAT_PMEENABLE;
pci_write_config(sc->ale_dev, pmc + PCIR_POWER_STATUS, pmstat, 2);
}
static int
ale_suspend(device_t dev)
{
struct ale_softc *sc;
sc = device_get_softc(dev);
ALE_LOCK(sc);
ale_stop(sc);
ale_setwol(sc);
ALE_UNLOCK(sc);
return (0);
}
static int
ale_resume(device_t dev)
{
struct ale_softc *sc;
struct ifnet *ifp;
int pmc;
uint16_t pmstat;
sc = device_get_softc(dev);
ALE_LOCK(sc);
if (pci_find_cap(sc->ale_dev, PCIY_PMG, &pmc) == 0) {
/* Disable PME and clear PME status. */
pmstat = pci_read_config(sc->ale_dev,
pmc + PCIR_POWER_STATUS, 2);
if ((pmstat & PCIM_PSTAT_PMEENABLE) != 0) {
pmstat &= ~PCIM_PSTAT_PMEENABLE;
pci_write_config(sc->ale_dev,
pmc + PCIR_POWER_STATUS, pmstat, 2);
}
}
/* Reset PHY. */
ale_phy_reset(sc);
ifp = sc->ale_ifp;
if ((ifp->if_flags & IFF_UP) != 0) {
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
ale_init_locked(sc);
}
ALE_UNLOCK(sc);
return (0);
}
static int
ale_encap(struct ale_softc *sc, struct mbuf **m_head)
{
struct ale_txdesc *txd, *txd_last;
struct tx_desc *desc;
struct mbuf *m;
struct ip *ip;
struct tcphdr *tcp;
bus_dma_segment_t txsegs[ALE_MAXTXSEGS];
bus_dmamap_t map;
uint32_t cflags, hdrlen, ip_off, poff, vtag;
int error, i, nsegs, prod, si;
ALE_LOCK_ASSERT(sc);
M_ASSERTPKTHDR((*m_head));
m = *m_head;
ip = NULL;
tcp = NULL;
cflags = vtag = 0;
ip_off = poff = 0;
if ((m->m_pkthdr.csum_flags & (ALE_CSUM_FEATURES | CSUM_TSO)) != 0) {
/*
* AR81xx requires offset of TCP/UDP payload in its Tx
* descriptor to perform hardware Tx checksum offload.
* Additionally, TSO requires IP/TCP header size and
* modification of IP/TCP header in order to make TSO
* engine work. This kind of operation takes many CPU
* cycles on FreeBSD so fast host CPU is required to
* get smooth TSO performance.
*/
struct ether_header *eh;
if (M_WRITABLE(m) == 0) {
/* Get a writable copy. */
m = m_dup(*m_head, M_DONTWAIT);
/* Release original mbufs. */
m_freem(*m_head);
if (m == NULL) {
*m_head = NULL;
return (ENOBUFS);
}
*m_head = m;
}
/*
* Buggy-controller requires 4 byte aligned Tx buffer
* to make custom checksum offload work.
*/
if ((sc->ale_flags & ALE_FLAG_TXCSUM_BUG) != 0 &&
(m->m_pkthdr.csum_flags & ALE_CSUM_FEATURES) != 0 &&
(mtod(m, intptr_t) & 3) != 0) {
m = m_defrag(*m_head, M_DONTWAIT);
if (m == NULL) {
*m_head = NULL;
return (ENOBUFS);
}
*m_head = m;
}
ip_off = sizeof(struct ether_header);
m = m_pullup(m, ip_off);
if (m == NULL) {
*m_head = NULL;
return (ENOBUFS);
}
eh = mtod(m, struct ether_header *);
/*
* Check if hardware VLAN insertion is off.
* Additional check for LLC/SNAP frame?
*/
if (eh->ether_type == htons(ETHERTYPE_VLAN)) {
ip_off = sizeof(struct ether_vlan_header);
m = m_pullup(m, ip_off);
if (m == NULL) {
*m_head = NULL;
return (ENOBUFS);
}
}
m = m_pullup(m, ip_off + sizeof(struct ip));
if (m == NULL) {
*m_head = NULL;
return (ENOBUFS);
}
ip = (struct ip *)(mtod(m, char *) + ip_off);
poff = ip_off + (ip->ip_hl << 2);
if ((m->m_pkthdr.csum_flags & CSUM_TSO) != 0) {
/*
* XXX
* AR81xx requires the first descriptor should
* not include any TCP playload for TSO case.
* (i.e. ethernet header + IP + TCP header only)
* m_pullup(9) above will ensure this too.
* However it's not correct if the first mbuf
* of the chain does not use cluster.
*/
m = m_pullup(m, poff + sizeof(struct tcphdr));
if (m == NULL) {
*m_head = NULL;
return (ENOBUFS);
}
ip = (struct ip *)(mtod(m, char *) + ip_off);
tcp = (struct tcphdr *)(mtod(m, char *) + poff);
m = m_pullup(m, poff + (tcp->th_off << 2));
if (m == NULL) {
*m_head = NULL;
return (ENOBUFS);
}
/*
* AR81xx requires IP/TCP header size and offset as
* well as TCP pseudo checksum which complicates
* TSO configuration. I guess this comes from the
* adherence to Microsoft NDIS Large Send
* specification which requires insertion of
* pseudo checksum by upper stack. The pseudo
* checksum that NDIS refers to doesn't include
* TCP payload length so ale(4) should recompute
* the pseudo checksum here. Hopefully this wouldn't
* be much burden on modern CPUs.
* Reset IP checksum and recompute TCP pseudo
* checksum as NDIS specification said.
*/
ip->ip_sum = 0;
tcp->th_sum = in_pseudo(ip->ip_src.s_addr,
ip->ip_dst.s_addr, htons(IPPROTO_TCP));
}
*m_head = m;
}
si = prod = sc->ale_cdata.ale_tx_prod;
txd = &sc->ale_cdata.ale_txdesc[prod];
txd_last = txd;
map = txd->tx_dmamap;
error = bus_dmamap_load_mbuf_sg(sc->ale_cdata.ale_tx_tag, map,
*m_head, txsegs, &nsegs, 0);
if (error == EFBIG) {
m = m_collapse(*m_head, M_DONTWAIT, ALE_MAXTXSEGS);
if (m == NULL) {
m_freem(*m_head);
*m_head = NULL;
return (ENOMEM);
}
*m_head = m;
error = bus_dmamap_load_mbuf_sg(sc->ale_cdata.ale_tx_tag, map,
*m_head, txsegs, &nsegs, 0);
if (error != 0) {
m_freem(*m_head);
*m_head = NULL;
return (error);
}
} else if (error != 0)
return (error);
if (nsegs == 0) {
m_freem(*m_head);
*m_head = NULL;
return (EIO);
}
/* Check descriptor overrun. */
if (sc->ale_cdata.ale_tx_cnt + nsegs >= ALE_TX_RING_CNT - 3) {
bus_dmamap_unload(sc->ale_cdata.ale_tx_tag, map);
return (ENOBUFS);
}
bus_dmamap_sync(sc->ale_cdata.ale_tx_tag, map, BUS_DMASYNC_PREWRITE);
m = *m_head;
if ((m->m_pkthdr.csum_flags & CSUM_TSO) != 0) {
/* Request TSO and set MSS. */
cflags |= ALE_TD_TSO;
cflags |= ((uint32_t)m->m_pkthdr.tso_segsz << ALE_TD_MSS_SHIFT);
/* Set IP/TCP header size. */
cflags |= ip->ip_hl << ALE_TD_IPHDR_LEN_SHIFT;
cflags |= tcp->th_off << ALE_TD_TCPHDR_LEN_SHIFT;
} else if ((m->m_pkthdr.csum_flags & ALE_CSUM_FEATURES) != 0) {
/*
* AR81xx supports Tx custom checksum offload feature
* that offloads single 16bit checksum computation.
* So you can choose one among IP, TCP and UDP.
* Normally driver sets checksum start/insertion
* position from the information of TCP/UDP frame as
* TCP/UDP checksum takes more time than that of IP.
* However it seems that custom checksum offload
* requires 4 bytes aligned Tx buffers due to hardware
* bug.
* AR81xx also supports explicit Tx checksum computation
* if it is told that the size of IP header and TCP
* header(for UDP, the header size does not matter
* because it's fixed length). However with this scheme
* TSO does not work so you have to choose one either
* TSO or explicit Tx checksum offload. I chosen TSO
* plus custom checksum offload with work-around which
* will cover most common usage for this consumer
* ethernet controller. The work-around takes a lot of
* CPU cycles if Tx buffer is not aligned on 4 bytes
* boundary, though.
*/
cflags |= ALE_TD_CXSUM;
/* Set checksum start offset. */
cflags |= (poff << ALE_TD_CSUM_PLOADOFFSET_SHIFT);
/* Set checksum insertion position of TCP/UDP. */
cflags |= ((poff + m->m_pkthdr.csum_data) <<
ALE_TD_CSUM_XSUMOFFSET_SHIFT);
}
/* Configure VLAN hardware tag insertion. */
if ((m->m_flags & M_VLANTAG) != 0) {
vtag = ALE_TX_VLAN_TAG(m->m_pkthdr.ether_vtag);
vtag = ((vtag << ALE_TD_VLAN_SHIFT) & ALE_TD_VLAN_MASK);
cflags |= ALE_TD_INSERT_VLAN_TAG;
}
i = 0;
if ((m->m_pkthdr.csum_flags & CSUM_TSO) != 0) {
/*
* Make sure the first fragment contains
* only ethernet and IP/TCP header with options.
*/
hdrlen = poff + (tcp->th_off << 2);
desc = &sc->ale_cdata.ale_tx_ring[prod];
desc->addr = htole64(txsegs[i].ds_addr);
desc->len = htole32(ALE_TX_BYTES(hdrlen) | vtag);
desc->flags = htole32(cflags);
sc->ale_cdata.ale_tx_cnt++;
ALE_DESC_INC(prod, ALE_TX_RING_CNT);
if (m->m_len - hdrlen > 0) {
/* Handle remaining payload of the first fragment. */
desc = &sc->ale_cdata.ale_tx_ring[prod];
desc->addr = htole64(txsegs[i].ds_addr + hdrlen);
desc->len = htole32(ALE_TX_BYTES(m->m_len - hdrlen) |
vtag);
desc->flags = htole32(cflags);
sc->ale_cdata.ale_tx_cnt++;
ALE_DESC_INC(prod, ALE_TX_RING_CNT);
}
i = 1;
}
for (; i < nsegs; i++) {
desc = &sc->ale_cdata.ale_tx_ring[prod];
desc->addr = htole64(txsegs[i].ds_addr);
desc->len = htole32(ALE_TX_BYTES(txsegs[i].ds_len) | vtag);
desc->flags = htole32(cflags);
sc->ale_cdata.ale_tx_cnt++;
ALE_DESC_INC(prod, ALE_TX_RING_CNT);
}
/* Update producer index. */
sc->ale_cdata.ale_tx_prod = prod;
/* Set TSO header on the first descriptor. */
if ((m->m_pkthdr.csum_flags & CSUM_TSO) != 0) {
desc = &sc->ale_cdata.ale_tx_ring[si];
desc->flags |= htole32(ALE_TD_TSO_HDR);
}
/* Finally set EOP on the last descriptor. */
prod = (prod + ALE_TX_RING_CNT - 1) % ALE_TX_RING_CNT;
desc = &sc->ale_cdata.ale_tx_ring[prod];
desc->flags |= htole32(ALE_TD_EOP);
/* Swap dmamap of the first and the last. */
txd = &sc->ale_cdata.ale_txdesc[prod];
map = txd_last->tx_dmamap;
txd_last->tx_dmamap = txd->tx_dmamap;
txd->tx_dmamap = map;
txd->tx_m = m;
/* Sync descriptors. */
bus_dmamap_sync(sc->ale_cdata.ale_tx_ring_tag,
sc->ale_cdata.ale_tx_ring_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
return (0);
}
static void
ale_start(struct ifnet *ifp)
{
struct ale_softc *sc;
sc = ifp->if_softc;
ALE_LOCK(sc);
ale_start_locked(ifp);
ALE_UNLOCK(sc);
}
static void
ale_start_locked(struct ifnet *ifp)
{
struct ale_softc *sc;
struct mbuf *m_head;
int enq;
sc = ifp->if_softc;
ALE_LOCK_ASSERT(sc);
/* Reclaim transmitted frames. */
if (sc->ale_cdata.ale_tx_cnt >= ALE_TX_DESC_HIWAT)
ale_txeof(sc);
if ((ifp->if_drv_flags & (IFF_DRV_RUNNING | IFF_DRV_OACTIVE)) !=
IFF_DRV_RUNNING || (sc->ale_flags & ALE_FLAG_LINK) == 0)
return;
for (enq = 0; !IFQ_DRV_IS_EMPTY(&ifp->if_snd); ) {
IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head);
if (m_head == NULL)
break;
/*
* Pack the data into the transmit ring. If we
* don't have room, set the OACTIVE flag and wait
* for the NIC to drain the ring.
*/
if (ale_encap(sc, &m_head)) {
if (m_head == NULL)
break;
IFQ_DRV_PREPEND(&ifp->if_snd, m_head);
ifp->if_drv_flags |= IFF_DRV_OACTIVE;
break;
}
enq++;
/*
* If there's a BPF listener, bounce a copy of this frame
* to him.
*/
ETHER_BPF_MTAP(ifp, m_head);
}
if (enq > 0) {
/* Kick. */
CSR_WRITE_4(sc, ALE_MBOX_TPD_PROD_IDX,
sc->ale_cdata.ale_tx_prod);
/* Set a timeout in case the chip goes out to lunch. */
sc->ale_watchdog_timer = ALE_TX_TIMEOUT;
}
}
static void
ale_watchdog(struct ale_softc *sc)
{
struct ifnet *ifp;
ALE_LOCK_ASSERT(sc);
if (sc->ale_watchdog_timer == 0 || --sc->ale_watchdog_timer)
return;
ifp = sc->ale_ifp;
if ((sc->ale_flags & ALE_FLAG_LINK) == 0) {
if_printf(sc->ale_ifp, "watchdog timeout (lost link)\n");
ifp->if_oerrors++;
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
ale_init_locked(sc);
return;
}
if_printf(sc->ale_ifp, "watchdog timeout -- resetting\n");
ifp->if_oerrors++;
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
ale_init_locked(sc);
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
ale_start_locked(ifp);
}
static int
ale_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data)
{
struct ale_softc *sc;
struct ifreq *ifr;
struct mii_data *mii;
int error, mask;
sc = ifp->if_softc;
ifr = (struct ifreq *)data;
error = 0;
switch (cmd) {
case SIOCSIFMTU:
if (ifr->ifr_mtu < ETHERMIN || ifr->ifr_mtu > ALE_JUMBO_MTU ||
((sc->ale_flags & ALE_FLAG_JUMBO) == 0 &&
ifr->ifr_mtu > ETHERMTU))
error = EINVAL;
else if (ifp->if_mtu != ifr->ifr_mtu) {
ALE_LOCK(sc);
ifp->if_mtu = ifr->ifr_mtu;
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) {
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
ale_init_locked(sc);
}
ALE_UNLOCK(sc);
}
break;
case SIOCSIFFLAGS:
ALE_LOCK(sc);
if ((ifp->if_flags & IFF_UP) != 0) {
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) {
if (((ifp->if_flags ^ sc->ale_if_flags)
& (IFF_PROMISC | IFF_ALLMULTI)) != 0)
ale_rxfilter(sc);
} else {
ale_init_locked(sc);
}
} else {
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0)
ale_stop(sc);
}
sc->ale_if_flags = ifp->if_flags;
ALE_UNLOCK(sc);
break;
case SIOCADDMULTI:
case SIOCDELMULTI:
ALE_LOCK(sc);
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0)
ale_rxfilter(sc);
ALE_UNLOCK(sc);
break;
case SIOCSIFMEDIA:
case SIOCGIFMEDIA:
mii = device_get_softc(sc->ale_miibus);
error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, cmd);
break;
case SIOCSIFCAP:
ALE_LOCK(sc);
mask = ifr->ifr_reqcap ^ ifp->if_capenable;
if ((mask & IFCAP_TXCSUM) != 0 &&
(ifp->if_capabilities & IFCAP_TXCSUM) != 0) {
ifp->if_capenable ^= IFCAP_TXCSUM;
if ((ifp->if_capenable & IFCAP_TXCSUM) != 0)
ifp->if_hwassist |= ALE_CSUM_FEATURES;
else
ifp->if_hwassist &= ~ALE_CSUM_FEATURES;
}
if ((mask & IFCAP_RXCSUM) != 0 &&
(ifp->if_capabilities & IFCAP_RXCSUM) != 0)
ifp->if_capenable ^= IFCAP_RXCSUM;
if ((mask & IFCAP_TSO4) != 0 &&
(ifp->if_capabilities & IFCAP_TSO4) != 0) {
ifp->if_capenable ^= IFCAP_TSO4;
if ((ifp->if_capenable & IFCAP_TSO4) != 0)
ifp->if_hwassist |= CSUM_TSO;
else
ifp->if_hwassist &= ~CSUM_TSO;
}
if ((mask & IFCAP_WOL_MCAST) != 0 &&
(ifp->if_capabilities & IFCAP_WOL_MCAST) != 0)
ifp->if_capenable ^= IFCAP_WOL_MCAST;
if ((mask & IFCAP_WOL_MAGIC) != 0 &&
(ifp->if_capabilities & IFCAP_WOL_MAGIC) != 0)
ifp->if_capenable ^= IFCAP_WOL_MAGIC;
if ((mask & IFCAP_VLAN_HWCSUM) != 0 &&
(ifp->if_capabilities & IFCAP_VLAN_HWCSUM) != 0)
ifp->if_capenable ^= IFCAP_VLAN_HWCSUM;
if ((mask & IFCAP_VLAN_HWTSO) != 0 &&
(ifp->if_capabilities & IFCAP_VLAN_HWTSO) != 0)
ifp->if_capenable ^= IFCAP_VLAN_HWTSO;
if ((mask & IFCAP_VLAN_HWTAGGING) != 0 &&
(ifp->if_capabilities & IFCAP_VLAN_HWTAGGING) != 0) {
ifp->if_capenable ^= IFCAP_VLAN_HWTAGGING;
if ((ifp->if_capenable & IFCAP_VLAN_HWTAGGING) == 0)
ifp->if_capenable &= ~IFCAP_VLAN_HWTSO;
ale_rxvlan(sc);
}
ALE_UNLOCK(sc);
VLAN_CAPABILITIES(ifp);
break;
default:
error = ether_ioctl(ifp, cmd, data);
break;
}
return (error);
}
static void
ale_mac_config(struct ale_softc *sc)
{
struct mii_data *mii;
uint32_t reg;
ALE_LOCK_ASSERT(sc);
mii = device_get_softc(sc->ale_miibus);
reg = CSR_READ_4(sc, ALE_MAC_CFG);
reg &= ~(MAC_CFG_FULL_DUPLEX | MAC_CFG_TX_FC | MAC_CFG_RX_FC |
MAC_CFG_SPEED_MASK);
/* Reprogram MAC with resolved speed/duplex. */
switch (IFM_SUBTYPE(mii->mii_media_active)) {
case IFM_10_T:
case IFM_100_TX:
reg |= MAC_CFG_SPEED_10_100;
break;
case IFM_1000_T:
reg |= MAC_CFG_SPEED_1000;
break;
}
if ((IFM_OPTIONS(mii->mii_media_active) & IFM_FDX) != 0) {
reg |= MAC_CFG_FULL_DUPLEX;
#ifdef notyet
if ((IFM_OPTIONS(mii->mii_media_active) & IFM_ETH_TXPAUSE) != 0)
reg |= MAC_CFG_TX_FC;
if ((IFM_OPTIONS(mii->mii_media_active) & IFM_ETH_RXPAUSE) != 0)
reg |= MAC_CFG_RX_FC;
#endif
}
CSR_WRITE_4(sc, ALE_MAC_CFG, reg);
}
static void
ale_link_task(void *arg, int pending)
{
struct ale_softc *sc;
struct mii_data *mii;
struct ifnet *ifp;
uint32_t reg;
sc = (struct ale_softc *)arg;
ALE_LOCK(sc);
mii = device_get_softc(sc->ale_miibus);
ifp = sc->ale_ifp;
if (mii == NULL || ifp == NULL ||
(ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
ALE_UNLOCK(sc);
return;
}
sc->ale_flags &= ~ALE_FLAG_LINK;
if ((mii->mii_media_status & (IFM_ACTIVE | IFM_AVALID)) ==
(IFM_ACTIVE | IFM_AVALID)) {
switch (IFM_SUBTYPE(mii->mii_media_active)) {
case IFM_10_T:
case IFM_100_TX:
sc->ale_flags |= ALE_FLAG_LINK;
break;
case IFM_1000_T:
if ((sc->ale_flags & ALE_FLAG_FASTETHER) == 0)
sc->ale_flags |= ALE_FLAG_LINK;
break;
default:
break;
}
}
/* Stop Rx/Tx MACs. */
ale_stop_mac(sc);
/* Program MACs with resolved speed/duplex/flow-control. */
if ((sc->ale_flags & ALE_FLAG_LINK) != 0) {
ale_mac_config(sc);
/* Reenable Tx/Rx MACs. */
reg = CSR_READ_4(sc, ALE_MAC_CFG);
reg |= MAC_CFG_TX_ENB | MAC_CFG_RX_ENB;
CSR_WRITE_4(sc, ALE_MAC_CFG, reg);
}
ALE_UNLOCK(sc);
}
static void
ale_stats_clear(struct ale_softc *sc)
{
struct smb sb;
uint32_t *reg;
int i;
for (reg = &sb.rx_frames, i = 0; reg <= &sb.rx_pkts_filtered; reg++) {
CSR_READ_4(sc, ALE_RX_MIB_BASE + i);
i += sizeof(uint32_t);
}
/* Read Tx statistics. */
for (reg = &sb.tx_frames, i = 0; reg <= &sb.tx_mcast_bytes; reg++) {
CSR_READ_4(sc, ALE_TX_MIB_BASE + i);
i += sizeof(uint32_t);
}
}
static void
ale_stats_update(struct ale_softc *sc)
{
struct ale_hw_stats *stat;
struct smb sb, *smb;
struct ifnet *ifp;
uint32_t *reg;
int i;
ALE_LOCK_ASSERT(sc);
ifp = sc->ale_ifp;
stat = &sc->ale_stats;
smb = &sb;
/* Read Rx statistics. */
for (reg = &sb.rx_frames, i = 0; reg <= &sb.rx_pkts_filtered; reg++) {
*reg = CSR_READ_4(sc, ALE_RX_MIB_BASE + i);
i += sizeof(uint32_t);
}
/* Read Tx statistics. */
for (reg = &sb.tx_frames, i = 0; reg <= &sb.tx_mcast_bytes; reg++) {
*reg = CSR_READ_4(sc, ALE_TX_MIB_BASE + i);
i += sizeof(uint32_t);
}
/* Rx stats. */
stat->rx_frames += smb->rx_frames;
stat->rx_bcast_frames += smb->rx_bcast_frames;
stat->rx_mcast_frames += smb->rx_mcast_frames;
stat->rx_pause_frames += smb->rx_pause_frames;
stat->rx_control_frames += smb->rx_control_frames;
stat->rx_crcerrs += smb->rx_crcerrs;
stat->rx_lenerrs += smb->rx_lenerrs;
stat->rx_bytes += smb->rx_bytes;
stat->rx_runts += smb->rx_runts;
stat->rx_fragments += smb->rx_fragments;
stat->rx_pkts_64 += smb->rx_pkts_64;
stat->rx_pkts_65_127 += smb->rx_pkts_65_127;
stat->rx_pkts_128_255 += smb->rx_pkts_128_255;
stat->rx_pkts_256_511 += smb->rx_pkts_256_511;
stat->rx_pkts_512_1023 += smb->rx_pkts_512_1023;
stat->rx_pkts_1024_1518 += smb->rx_pkts_1024_1518;
stat->rx_pkts_1519_max += smb->rx_pkts_1519_max;
stat->rx_pkts_truncated += smb->rx_pkts_truncated;
stat->rx_fifo_oflows += smb->rx_fifo_oflows;
stat->rx_rrs_errs += smb->rx_rrs_errs;
stat->rx_alignerrs += smb->rx_alignerrs;
stat->rx_bcast_bytes += smb->rx_bcast_bytes;
stat->rx_mcast_bytes += smb->rx_mcast_bytes;
stat->rx_pkts_filtered += smb->rx_pkts_filtered;
/* Tx stats. */
stat->tx_frames += smb->tx_frames;
stat->tx_bcast_frames += smb->tx_bcast_frames;
stat->tx_mcast_frames += smb->tx_mcast_frames;
stat->tx_pause_frames += smb->tx_pause_frames;
stat->tx_excess_defer += smb->tx_excess_defer;
stat->tx_control_frames += smb->tx_control_frames;
stat->tx_deferred += smb->tx_deferred;
stat->tx_bytes += smb->tx_bytes;
stat->tx_pkts_64 += smb->tx_pkts_64;
stat->tx_pkts_65_127 += smb->tx_pkts_65_127;
stat->tx_pkts_128_255 += smb->tx_pkts_128_255;
stat->tx_pkts_256_511 += smb->tx_pkts_256_511;
stat->tx_pkts_512_1023 += smb->tx_pkts_512_1023;
stat->tx_pkts_1024_1518 += smb->tx_pkts_1024_1518;
stat->tx_pkts_1519_max += smb->tx_pkts_1519_max;
stat->tx_single_colls += smb->tx_single_colls;
stat->tx_multi_colls += smb->tx_multi_colls;
stat->tx_late_colls += smb->tx_late_colls;
stat->tx_excess_colls += smb->tx_excess_colls;
stat->tx_abort += smb->tx_abort;
stat->tx_underrun += smb->tx_underrun;
stat->tx_desc_underrun += smb->tx_desc_underrun;
stat->tx_lenerrs += smb->tx_lenerrs;
stat->tx_pkts_truncated += smb->tx_pkts_truncated;
stat->tx_bcast_bytes += smb->tx_bcast_bytes;
stat->tx_mcast_bytes += smb->tx_mcast_bytes;
/* Update counters in ifnet. */
ifp->if_opackets += smb->tx_frames;
ifp->if_collisions += smb->tx_single_colls +
smb->tx_multi_colls * 2 + smb->tx_late_colls +
smb->tx_abort * HDPX_CFG_RETRY_DEFAULT;
/*
* XXX
* tx_pkts_truncated counter looks suspicious. It constantly
* increments with no sign of Tx errors. This may indicate
* the counter name is not correct one so I've removed the
* counter in output errors.
*/
ifp->if_oerrors += smb->tx_abort + smb->tx_late_colls +
smb->tx_underrun;
ifp->if_ipackets += smb->rx_frames;
ifp->if_ierrors += smb->rx_crcerrs + smb->rx_lenerrs +
smb->rx_runts + smb->rx_pkts_truncated +
smb->rx_fifo_oflows + smb->rx_rrs_errs +
smb->rx_alignerrs;
}
static int
ale_intr(void *arg)
{
struct ale_softc *sc;
uint32_t status;
sc = (struct ale_softc *)arg;
status = CSR_READ_4(sc, ALE_INTR_STATUS);
if ((status & ALE_INTRS) == 0)
return (FILTER_STRAY);
/* Disable interrupts. */
CSR_WRITE_4(sc, ALE_INTR_STATUS, INTR_DIS_INT);
taskqueue_enqueue(sc->ale_tq, &sc->ale_int_task);
return (FILTER_HANDLED);
}
static void
ale_int_task(void *arg, int pending)
{
struct ale_softc *sc;
struct ifnet *ifp;
uint32_t status;
int more;
sc = (struct ale_softc *)arg;
status = CSR_READ_4(sc, ALE_INTR_STATUS);
ALE_LOCK(sc);
if (sc->ale_morework != 0)
status |= INTR_RX_PKT;
if ((status & ALE_INTRS) == 0)
goto done;
/* Acknowledge interrupts but still disable interrupts. */
CSR_WRITE_4(sc, ALE_INTR_STATUS, status | INTR_DIS_INT);
ifp = sc->ale_ifp;
more = 0;
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) {
more = ale_rxeof(sc, sc->ale_process_limit);
if (more == EAGAIN)
sc->ale_morework = 1;
else if (more == EIO) {
sc->ale_stats.reset_brk_seq++;
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
ale_init_locked(sc);
ALE_UNLOCK(sc);
return;
}
if ((status & (INTR_DMA_RD_TO_RST | INTR_DMA_WR_TO_RST)) != 0) {
if ((status & INTR_DMA_RD_TO_RST) != 0)
device_printf(sc->ale_dev,
"DMA read error! -- resetting\n");
if ((status & INTR_DMA_WR_TO_RST) != 0)
device_printf(sc->ale_dev,
"DMA write error! -- resetting\n");
ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
ale_init_locked(sc);
ALE_UNLOCK(sc);
return;
}
if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
ale_start_locked(ifp);
}
if (more == EAGAIN ||
(CSR_READ_4(sc, ALE_INTR_STATUS) & ALE_INTRS) != 0) {
ALE_UNLOCK(sc);
taskqueue_enqueue(sc->ale_tq, &sc->ale_int_task);
return;
}
done:
ALE_UNLOCK(sc);
/* Re-enable interrupts. */
CSR_WRITE_4(sc, ALE_INTR_STATUS, 0x7FFFFFFF);
}
static void
ale_txeof(struct ale_softc *sc)
{
struct ifnet *ifp;
struct ale_txdesc *txd;
uint32_t cons, prod;
int prog;
ALE_LOCK_ASSERT(sc);
ifp = sc->ale_ifp;
if (sc->ale_cdata.ale_tx_cnt == 0)
return;
bus_dmamap_sync(sc->ale_cdata.ale_tx_ring_tag,
sc->ale_cdata.ale_tx_ring_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
if ((sc->ale_flags & ALE_FLAG_TXCMB_BUG) == 0) {
bus_dmamap_sync(sc->ale_cdata.ale_tx_cmb_tag,
sc->ale_cdata.ale_tx_cmb_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
prod = *sc->ale_cdata.ale_tx_cmb & TPD_CNT_MASK;
} else
prod = CSR_READ_2(sc, ALE_TPD_CONS_IDX);
cons = sc->ale_cdata.ale_tx_cons;
/*
* Go through our Tx list and free mbufs for those
* frames which have been transmitted.
*/
for (prog = 0; cons != prod; prog++,
ALE_DESC_INC(cons, ALE_TX_RING_CNT)) {
if (sc->ale_cdata.ale_tx_cnt <= 0)
break;
prog++;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
sc->ale_cdata.ale_tx_cnt--;
txd = &sc->ale_cdata.ale_txdesc[cons];
if (txd->tx_m != NULL) {
/* Reclaim transmitted mbufs. */
bus_dmamap_sync(sc->ale_cdata.ale_tx_tag,
txd->tx_dmamap, BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->ale_cdata.ale_tx_tag,
txd->tx_dmamap);
m_freem(txd->tx_m);
txd->tx_m = NULL;
}
}
if (prog > 0) {
sc->ale_cdata.ale_tx_cons = cons;
/*
* Unarm watchdog timer only when there is no pending
* Tx descriptors in queue.
*/
if (sc->ale_cdata.ale_tx_cnt == 0)
sc->ale_watchdog_timer = 0;
}
}
static void
ale_rx_update_page(struct ale_softc *sc, struct ale_rx_page **page,
uint32_t length, uint32_t *prod)
{
struct ale_rx_page *rx_page;
rx_page = *page;
/* Update consumer position. */
rx_page->cons += roundup(length + sizeof(struct rx_rs),
ALE_RX_PAGE_ALIGN);
if (rx_page->cons >= ALE_RX_PAGE_SZ) {
/*
* End of Rx page reached, let hardware reuse
* this page.
*/
rx_page->cons = 0;
*rx_page->cmb_addr = 0;
bus_dmamap_sync(rx_page->cmb_tag, rx_page->cmb_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
CSR_WRITE_1(sc, ALE_RXF0_PAGE0 + sc->ale_cdata.ale_rx_curp,
RXF_VALID);
/* Switch to alternate Rx page. */
sc->ale_cdata.ale_rx_curp ^= 1;
rx_page = *page =
&sc->ale_cdata.ale_rx_page[sc->ale_cdata.ale_rx_curp];
/* Page flipped, sync CMB and Rx page. */
bus_dmamap_sync(rx_page->page_tag, rx_page->page_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
bus_dmamap_sync(rx_page->cmb_tag, rx_page->cmb_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
/* Sync completed, cache updated producer index. */
*prod = *rx_page->cmb_addr;
}
}
/*
* It seems that AR81xx controller can compute partial checksum.
* The partial checksum value can be used to accelerate checksum
* computation for fragmented TCP/UDP packets. Upper network stack
* already takes advantage of the partial checksum value in IP
* reassembly stage. But I'm not sure the correctness of the
* partial hardware checksum assistance due to lack of data sheet.
* In addition, the Rx feature of controller that requires copying
* for every frames effectively nullifies one of most nice offload
* capability of controller.
*/
static void
ale_rxcsum(struct ale_softc *sc, struct mbuf *m, uint32_t status)
{
struct ifnet *ifp;
struct ip *ip;
char *p;
ifp = sc->ale_ifp;
m->m_pkthdr.csum_flags |= CSUM_IP_CHECKED;
if ((status & ALE_RD_IPCSUM_NOK) == 0)
m->m_pkthdr.csum_flags |= CSUM_IP_VALID;
if ((sc->ale_flags & ALE_FLAG_RXCSUM_BUG) == 0) {
if (((status & ALE_RD_IPV4_FRAG) == 0) &&
((status & (ALE_RD_TCP | ALE_RD_UDP)) != 0) &&
((status & ALE_RD_TCP_UDPCSUM_NOK) == 0)) {
m->m_pkthdr.csum_flags |=
CSUM_DATA_VALID | CSUM_PSEUDO_HDR;
m->m_pkthdr.csum_data = 0xffff;
}
} else {
if ((status & (ALE_RD_TCP | ALE_RD_UDP)) != 0 &&
(status & ALE_RD_TCP_UDPCSUM_NOK) == 0) {
p = mtod(m, char *);
p += ETHER_HDR_LEN;
if ((status & ALE_RD_802_3) != 0)
p += LLC_SNAPFRAMELEN;
if ((ifp->if_capenable & IFCAP_VLAN_HWTAGGING) == 0 &&
(status & ALE_RD_VLAN) != 0)
p += ETHER_VLAN_ENCAP_LEN;
ip = (struct ip *)p;
if (ip->ip_off != 0 && (status & ALE_RD_IPV4_DF) == 0)
return;
m->m_pkthdr.csum_flags |= CSUM_DATA_VALID |
CSUM_PSEUDO_HDR;
m->m_pkthdr.csum_data = 0xffff;
}
}
/*
* Don't mark bad checksum for TCP/UDP frames
* as fragmented frames may always have set
* bad checksummed bit of frame status.
*/
}
/* Process received frames. */
static int
ale_rxeof(struct ale_softc *sc, int count)
{
struct ale_rx_page *rx_page;
struct rx_rs *rs;
struct ifnet *ifp;
struct mbuf *m;
uint32_t length, prod, seqno, status, vtags;
int prog;
ifp = sc->ale_ifp;
rx_page = &sc->ale_cdata.ale_rx_page[sc->ale_cdata.ale_rx_curp];
bus_dmamap_sync(rx_page->cmb_tag, rx_page->cmb_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
bus_dmamap_sync(rx_page->page_tag, rx_page->page_map,
BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE);
/*
* Don't directly access producer index as hardware may
* update it while Rx handler is in progress. It would
* be even better if there is a way to let hardware
* know how far driver processed its received frames.
* Alternatively, hardware could provide a way to disable
* CMB updates until driver acknowledges the end of CMB
* access.
*/
prod = *rx_page->cmb_addr;
for (prog = 0; prog < count; prog++) {
if (rx_page->cons >= prod)
break;
rs = (struct rx_rs *)(rx_page->page_addr + rx_page->cons);
seqno = ALE_RX_SEQNO(le32toh(rs->seqno));
if (sc->ale_cdata.ale_rx_seqno != seqno) {
/*
* Normally I believe this should not happen unless
* severe driver bug or corrupted memory. However
* it seems to happen under certain conditions which
* is triggered by abrupt Rx events such as initiation
* of bulk transfer of remote host. It's not easy to
* reproduce this and I doubt it could be related
* with FIFO overflow of hardware or activity of Tx
* CMB updates. I also remember similar behaviour
* seen on RealTek 8139 which uses resembling Rx
* scheme.
*/
if (bootverbose)
device_printf(sc->ale_dev,
"garbled seq: %u, expected: %u -- "
"resetting!\n", seqno,
sc->ale_cdata.ale_rx_seqno);
return (EIO);
}
/* Frame received. */
sc->ale_cdata.ale_rx_seqno++;
length = ALE_RX_BYTES(le32toh(rs->length));
status = le32toh(rs->flags);
if ((status & ALE_RD_ERROR) != 0) {
/*
* We want to pass the following frames to upper
* layer regardless of error status of Rx return
* status.
*
* o IP/TCP/UDP checksum is bad.
* o frame length and protocol specific length
* does not match.
*/
if ((status & (ALE_RD_CRC | ALE_RD_CODE |
ALE_RD_DRIBBLE | ALE_RD_RUNT | ALE_RD_OFLOW |
ALE_RD_TRUNC)) != 0) {
ale_rx_update_page(sc, &rx_page, length, &prod);
continue;
}
}
/*
* m_devget(9) is major bottle-neck of ale(4)(It comes
* from hardware limitation). For jumbo frames we could
* get a slightly better performance if driver use
* m_getjcl(9) with proper buffer size argument. However
* that would make code more complicated and I don't
* think users would expect good Rx performance numbers
* on these low-end consumer ethernet controller.
*/
m = m_devget((char *)(rs + 1), length - ETHER_CRC_LEN,
ETHER_ALIGN, ifp, NULL);
if (m == NULL) {
ifp->if_iqdrops++;
ale_rx_update_page(sc, &rx_page, length, &prod);
continue;
}
if ((ifp->if_capenable & IFCAP_RXCSUM) != 0 &&
(status & ALE_RD_IPV4) != 0)
ale_rxcsum(sc, m, status);
if ((ifp->if_capenable & IFCAP_VLAN_HWTAGGING) != 0 &&
(status & ALE_RD_VLAN) != 0) {
vtags = ALE_RX_VLAN(le32toh(rs->vtags));
m->m_pkthdr.ether_vtag = ALE_RX_VLAN_TAG(vtags);
m->m_flags |= M_VLANTAG;
}
/* Pass it to upper layer. */
ALE_UNLOCK(sc);
(*ifp->if_input)(ifp, m);
ALE_LOCK(sc);
ale_rx_update_page(sc, &rx_page, length, &prod);
}
return (count > 0 ? 0 : EAGAIN);
}
static void
ale_tick(void *arg)
{
struct ale_softc *sc;
struct mii_data *mii;
sc = (struct ale_softc *)arg;
ALE_LOCK_ASSERT(sc);
mii = device_get_softc(sc->ale_miibus);
mii_tick(mii);
ale_stats_update(sc);
/*
* Reclaim Tx buffers that have been transferred. It's not
* needed here but it would release allocated mbuf chains
* faster and limit the maximum delay to a hz.
*/
ale_txeof(sc);
ale_watchdog(sc);
callout_reset(&sc->ale_tick_ch, hz, ale_tick, sc);
}
static void
ale_reset(struct ale_softc *sc)
{
uint32_t reg;
int i;
/* Initialize PCIe module. From Linux. */
CSR_WRITE_4(sc, 0x1008, CSR_READ_4(sc, 0x1008) | 0x8000);
CSR_WRITE_4(sc, ALE_MASTER_CFG, MASTER_RESET);
for (i = ALE_RESET_TIMEOUT; i > 0; i--) {
DELAY(10);
if ((CSR_READ_4(sc, ALE_MASTER_CFG) & MASTER_RESET) == 0)
break;
}
if (i == 0)
device_printf(sc->ale_dev, "master reset timeout!\n");
for (i = ALE_RESET_TIMEOUT; i > 0; i--) {
if ((reg = CSR_READ_4(sc, ALE_IDLE_STATUS)) == 0)
break;
DELAY(10);
}
if (i == 0)
device_printf(sc->ale_dev, "reset timeout(0x%08x)!\n", reg);
}
static void
ale_init(void *xsc)
{
struct ale_softc *sc;
sc = (struct ale_softc *)xsc;
ALE_LOCK(sc);
ale_init_locked(sc);
ALE_UNLOCK(sc);
}
static void
ale_init_locked(struct ale_softc *sc)
{
struct ifnet *ifp;
struct mii_data *mii;
uint8_t eaddr[ETHER_ADDR_LEN];
bus_addr_t paddr;
uint32_t reg, rxf_hi, rxf_lo;
ALE_LOCK_ASSERT(sc);
ifp = sc->ale_ifp;
mii = device_get_softc(sc->ale_miibus);
if ((ifp->if_drv_flags & IFF_DRV_RUNNING) != 0)
return;
/*
* Cancel any pending I/O.
*/
ale_stop(sc);
/*
* Reset the chip to a known state.
*/
ale_reset(sc);
/* Initialize Tx descriptors, DMA memory blocks. */
ale_init_rx_pages(sc);
ale_init_tx_ring(sc);
/* Reprogram the station address. */
bcopy(IF_LLADDR(ifp), eaddr, ETHER_ADDR_LEN);
CSR_WRITE_4(sc, ALE_PAR0,
eaddr[2] << 24 | eaddr[3] << 16 | eaddr[4] << 8 | eaddr[5]);
CSR_WRITE_4(sc, ALE_PAR1, eaddr[0] << 8 | eaddr[1]);
/*
* Clear WOL status and disable all WOL feature as WOL
* would interfere Rx operation under normal environments.
*/
CSR_READ_4(sc, ALE_WOL_CFG);
CSR_WRITE_4(sc, ALE_WOL_CFG, 0);
/*
* Set Tx descriptor/RXF0/CMB base addresses. They share
* the same high address part of DMAable region.
*/
paddr = sc->ale_cdata.ale_tx_ring_paddr;
CSR_WRITE_4(sc, ALE_TPD_ADDR_HI, ALE_ADDR_HI(paddr));
CSR_WRITE_4(sc, ALE_TPD_ADDR_LO, ALE_ADDR_LO(paddr));
CSR_WRITE_4(sc, ALE_TPD_CNT,
(ALE_TX_RING_CNT << TPD_CNT_SHIFT) & TPD_CNT_MASK);
/* Set Rx page base address, note we use single queue. */
paddr = sc->ale_cdata.ale_rx_page[0].page_paddr;
CSR_WRITE_4(sc, ALE_RXF0_PAGE0_ADDR_LO, ALE_ADDR_LO(paddr));
paddr = sc->ale_cdata.ale_rx_page[1].page_paddr;
CSR_WRITE_4(sc, ALE_RXF0_PAGE1_ADDR_LO, ALE_ADDR_LO(paddr));
/* Set Tx/Rx CMB addresses. */
paddr = sc->ale_cdata.ale_tx_cmb_paddr;
CSR_WRITE_4(sc, ALE_TX_CMB_ADDR_LO, ALE_ADDR_LO(paddr));
paddr = sc->ale_cdata.ale_rx_page[0].cmb_paddr;
CSR_WRITE_4(sc, ALE_RXF0_CMB0_ADDR_LO, ALE_ADDR_LO(paddr));
paddr = sc->ale_cdata.ale_rx_page[1].cmb_paddr;
CSR_WRITE_4(sc, ALE_RXF0_CMB1_ADDR_LO, ALE_ADDR_LO(paddr));
/* Mark RXF0 is valid. */
CSR_WRITE_1(sc, ALE_RXF0_PAGE0, RXF_VALID);
CSR_WRITE_1(sc, ALE_RXF0_PAGE1, RXF_VALID);
/*
* No need to initialize RFX1/RXF2/RXF3. We don't use
* multi-queue yet.
*/
/* Set Rx page size, excluding guard frame size. */
CSR_WRITE_4(sc, ALE_RXF_PAGE_SIZE, ALE_RX_PAGE_SZ);
/* Tell hardware that we're ready to load DMA blocks. */
CSR_WRITE_4(sc, ALE_DMA_BLOCK, DMA_BLOCK_LOAD);
/* Set Rx/Tx interrupt trigger threshold. */
CSR_WRITE_4(sc, ALE_INT_TRIG_THRESH, (1 << INT_TRIG_RX_THRESH_SHIFT) |
(4 << INT_TRIG_TX_THRESH_SHIFT));
/*
* XXX
* Set interrupt trigger timer, its purpose and relation
* with interrupt moderation mechanism is not clear yet.
*/
CSR_WRITE_4(sc, ALE_INT_TRIG_TIMER,
((ALE_USECS(10) << INT_TRIG_RX_TIMER_SHIFT) |
(ALE_USECS(1000) << INT_TRIG_TX_TIMER_SHIFT)));
/* Configure interrupt moderation timer. */
reg = ALE_USECS(sc->ale_int_rx_mod) << IM_TIMER_RX_SHIFT;
reg |= ALE_USECS(sc->ale_int_tx_mod) << IM_TIMER_TX_SHIFT;
CSR_WRITE_4(sc, ALE_IM_TIMER, reg);
reg = CSR_READ_4(sc, ALE_MASTER_CFG);
reg &= ~(MASTER_CHIP_REV_MASK | MASTER_CHIP_ID_MASK);
reg &= ~(MASTER_IM_RX_TIMER_ENB | MASTER_IM_TX_TIMER_ENB);
if (ALE_USECS(sc->ale_int_rx_mod) != 0)
reg |= MASTER_IM_RX_TIMER_ENB;
if (ALE_USECS(sc->ale_int_tx_mod) != 0)
reg |= MASTER_IM_TX_TIMER_ENB;
CSR_WRITE_4(sc, ALE_MASTER_CFG, reg);
CSR_WRITE_2(sc, ALE_INTR_CLR_TIMER, ALE_USECS(1000));
/* Set Maximum frame size of controller. */
if (ifp->if_mtu < ETHERMTU)
sc->ale_max_frame_size = ETHERMTU;
else
sc->ale_max_frame_size = ifp->if_mtu;
sc->ale_max_frame_size += ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN +
ETHER_CRC_LEN;
CSR_WRITE_4(sc, ALE_FRAME_SIZE, sc->ale_max_frame_size);
/* Configure IPG/IFG parameters. */
CSR_WRITE_4(sc, ALE_IPG_IFG_CFG,
((IPG_IFG_IPGT_DEFAULT << IPG_IFG_IPGT_SHIFT) & IPG_IFG_IPGT_MASK) |
((IPG_IFG_MIFG_DEFAULT << IPG_IFG_MIFG_SHIFT) & IPG_IFG_MIFG_MASK) |
((IPG_IFG_IPG1_DEFAULT << IPG_IFG_IPG1_SHIFT) & IPG_IFG_IPG1_MASK) |
((IPG_IFG_IPG2_DEFAULT << IPG_IFG_IPG2_SHIFT) & IPG_IFG_IPG2_MASK));
/* Set parameters for half-duplex media. */
CSR_WRITE_4(sc, ALE_HDPX_CFG,
((HDPX_CFG_LCOL_DEFAULT << HDPX_CFG_LCOL_SHIFT) &
HDPX_CFG_LCOL_MASK) |
((HDPX_CFG_RETRY_DEFAULT << HDPX_CFG_RETRY_SHIFT) &
HDPX_CFG_RETRY_MASK) | HDPX_CFG_EXC_DEF_EN |
((HDPX_CFG_ABEBT_DEFAULT << HDPX_CFG_ABEBT_SHIFT) &
HDPX_CFG_ABEBT_MASK) |
((HDPX_CFG_JAMIPG_DEFAULT << HDPX_CFG_JAMIPG_SHIFT) &
HDPX_CFG_JAMIPG_MASK));
/* Configure Tx jumbo frame parameters. */
if ((sc->ale_flags & ALE_FLAG_JUMBO) != 0) {
if (ifp->if_mtu < ETHERMTU)
reg = sc->ale_max_frame_size;
else if (ifp->if_mtu < 6 * 1024)
reg = (sc->ale_max_frame_size * 2) / 3;
else
reg = sc->ale_max_frame_size / 2;
CSR_WRITE_4(sc, ALE_TX_JUMBO_THRESH,
roundup(reg, TX_JUMBO_THRESH_UNIT) >>
TX_JUMBO_THRESH_UNIT_SHIFT);
}
/* Configure TxQ. */
reg = (128 << (sc->ale_dma_rd_burst >> DMA_CFG_RD_BURST_SHIFT))
<< TXQ_CFG_TX_FIFO_BURST_SHIFT;
reg |= (TXQ_CFG_TPD_BURST_DEFAULT << TXQ_CFG_TPD_BURST_SHIFT) &
TXQ_CFG_TPD_BURST_MASK;
CSR_WRITE_4(sc, ALE_TXQ_CFG, reg | TXQ_CFG_ENHANCED_MODE | TXQ_CFG_ENB);
/* Configure Rx jumbo frame & flow control parameters. */
if ((sc->ale_flags & ALE_FLAG_JUMBO) != 0) {
reg = roundup(sc->ale_max_frame_size, RX_JUMBO_THRESH_UNIT);
CSR_WRITE_4(sc, ALE_RX_JUMBO_THRESH,
(((reg >> RX_JUMBO_THRESH_UNIT_SHIFT) <<
RX_JUMBO_THRESH_MASK_SHIFT) & RX_JUMBO_THRESH_MASK) |
((RX_JUMBO_LKAH_DEFAULT << RX_JUMBO_LKAH_SHIFT) &
RX_JUMBO_LKAH_MASK));
reg = CSR_READ_4(sc, ALE_SRAM_RX_FIFO_LEN);
rxf_hi = (reg * 7) / 10;
rxf_lo = (reg * 3)/ 10;
CSR_WRITE_4(sc, ALE_RX_FIFO_PAUSE_THRESH,
((rxf_lo << RX_FIFO_PAUSE_THRESH_LO_SHIFT) &
RX_FIFO_PAUSE_THRESH_LO_MASK) |
((rxf_hi << RX_FIFO_PAUSE_THRESH_HI_SHIFT) &
RX_FIFO_PAUSE_THRESH_HI_MASK));
}
/* Disable RSS. */
CSR_WRITE_4(sc, ALE_RSS_IDT_TABLE0, 0);
CSR_WRITE_4(sc, ALE_RSS_CPU, 0);
/* Configure RxQ. */
CSR_WRITE_4(sc, ALE_RXQ_CFG,
RXQ_CFG_ALIGN_32 | RXQ_CFG_CUT_THROUGH_ENB | RXQ_CFG_ENB);
/* Configure DMA parameters. */
reg = 0;
if ((sc->ale_flags & ALE_FLAG_TXCMB_BUG) == 0)
reg |= DMA_CFG_TXCMB_ENB;
CSR_WRITE_4(sc, ALE_DMA_CFG,
DMA_CFG_OUT_ORDER | DMA_CFG_RD_REQ_PRI | DMA_CFG_RCB_64 |
sc->ale_dma_rd_burst | reg |
sc->ale_dma_wr_burst | DMA_CFG_RXCMB_ENB |
((DMA_CFG_RD_DELAY_CNT_DEFAULT << DMA_CFG_RD_DELAY_CNT_SHIFT) &
DMA_CFG_RD_DELAY_CNT_MASK) |
((DMA_CFG_WR_DELAY_CNT_DEFAULT << DMA_CFG_WR_DELAY_CNT_SHIFT) &
DMA_CFG_WR_DELAY_CNT_MASK));
/*
* Hardware can be configured to issue SMB interrupt based
* on programmed interval. Since there is a callout that is
* invoked for every hz in driver we use that instead of
* relying on periodic SMB interrupt.
*/
CSR_WRITE_4(sc, ALE_SMB_STAT_TIMER, ALE_USECS(0));
/* Clear MAC statistics. */
ale_stats_clear(sc);
/*
* Configure Tx/Rx MACs.
* - Auto-padding for short frames.
* - Enable CRC generation.
* Actual reconfiguration of MAC for resolved speed/duplex
* is followed after detection of link establishment.
* AR81xx always does checksum computation regardless of
* MAC_CFG_RXCSUM_ENB bit. In fact, setting the bit will
* cause Rx handling issue for fragmented IP datagrams due
* to silicon bug.
*/
reg = MAC_CFG_TX_CRC_ENB | MAC_CFG_TX_AUTO_PAD | MAC_CFG_FULL_DUPLEX |
((MAC_CFG_PREAMBLE_DEFAULT << MAC_CFG_PREAMBLE_SHIFT) &
MAC_CFG_PREAMBLE_MASK);
if ((sc->ale_flags & ALE_FLAG_FASTETHER) != 0)
reg |= MAC_CFG_SPEED_10_100;
else
reg |= MAC_CFG_SPEED_1000;
CSR_WRITE_4(sc, ALE_MAC_CFG, reg);
/* Set up the receive filter. */
ale_rxfilter(sc);
ale_rxvlan(sc);
/* Acknowledge all pending interrupts and clear it. */
CSR_WRITE_4(sc, ALE_INTR_MASK, ALE_INTRS);
CSR_WRITE_4(sc, ALE_INTR_STATUS, 0xFFFFFFFF);
CSR_WRITE_4(sc, ALE_INTR_STATUS, 0);
sc->ale_flags &= ~ALE_FLAG_LINK;
/* Switch to the current media. */
mii_mediachg(mii);
callout_reset(&sc->ale_tick_ch, hz, ale_tick, sc);
ifp->if_drv_flags |= IFF_DRV_RUNNING;
ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
}
static void
ale_stop(struct ale_softc *sc)
{
struct ifnet *ifp;
struct ale_txdesc *txd;
uint32_t reg;
int i;
ALE_LOCK_ASSERT(sc);
/*
* Mark the interface down and cancel the watchdog timer.
*/
ifp = sc->ale_ifp;
ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
sc->ale_flags &= ~ALE_FLAG_LINK;
callout_stop(&sc->ale_tick_ch);
sc->ale_watchdog_timer = 0;
ale_stats_update(sc);
/* Disable interrupts. */
CSR_WRITE_4(sc, ALE_INTR_MASK, 0);
CSR_WRITE_4(sc, ALE_INTR_STATUS, 0xFFFFFFFF);
/* Disable queue processing and DMA. */
reg = CSR_READ_4(sc, ALE_TXQ_CFG);
reg &= ~TXQ_CFG_ENB;
CSR_WRITE_4(sc, ALE_TXQ_CFG, reg);
reg = CSR_READ_4(sc, ALE_RXQ_CFG);
reg &= ~RXQ_CFG_ENB;
CSR_WRITE_4(sc, ALE_RXQ_CFG, reg);
reg = CSR_READ_4(sc, ALE_DMA_CFG);
reg &= ~(DMA_CFG_TXCMB_ENB | DMA_CFG_RXCMB_ENB);
CSR_WRITE_4(sc, ALE_DMA_CFG, reg);
DELAY(1000);
/* Stop Rx/Tx MACs. */
ale_stop_mac(sc);
/* Disable interrupts which might be touched in taskq handler. */
CSR_WRITE_4(sc, ALE_INTR_STATUS, 0xFFFFFFFF);
/*
* Free TX mbufs still in the queues.
*/
for (i = 0; i < ALE_TX_RING_CNT; i++) {
txd = &sc->ale_cdata.ale_txdesc[i];
if (txd->tx_m != NULL) {
bus_dmamap_sync(sc->ale_cdata.ale_tx_tag,
txd->tx_dmamap, BUS_DMASYNC_POSTWRITE);
bus_dmamap_unload(sc->ale_cdata.ale_tx_tag,
txd->tx_dmamap);
m_freem(txd->tx_m);
txd->tx_m = NULL;
}
}
}
static void
ale_stop_mac(struct ale_softc *sc)
{
uint32_t reg;
int i;
ALE_LOCK_ASSERT(sc);
reg = CSR_READ_4(sc, ALE_MAC_CFG);
if ((reg & (MAC_CFG_TX_ENB | MAC_CFG_RX_ENB)) != 0) {
reg &= ~MAC_CFG_TX_ENB | MAC_CFG_RX_ENB;
CSR_WRITE_4(sc, ALE_MAC_CFG, reg);
}
for (i = ALE_TIMEOUT; i > 0; i--) {
reg = CSR_READ_4(sc, ALE_IDLE_STATUS);
if (reg == 0)
break;
DELAY(10);
}
if (i == 0)
device_printf(sc->ale_dev,
"could not disable Tx/Rx MAC(0x%08x)!\n", reg);
}
static void
ale_init_tx_ring(struct ale_softc *sc)
{
struct ale_txdesc *txd;
int i;
ALE_LOCK_ASSERT(sc);
sc->ale_cdata.ale_tx_prod = 0;
sc->ale_cdata.ale_tx_cons = 0;
sc->ale_cdata.ale_tx_cnt = 0;
bzero(sc->ale_cdata.ale_tx_ring, ALE_TX_RING_SZ);
bzero(sc->ale_cdata.ale_tx_cmb, ALE_TX_CMB_SZ);
for (i = 0; i < ALE_TX_RING_CNT; i++) {
txd = &sc->ale_cdata.ale_txdesc[i];
txd->tx_m = NULL;
}
*sc->ale_cdata.ale_tx_cmb = 0;
bus_dmamap_sync(sc->ale_cdata.ale_tx_cmb_tag,
sc->ale_cdata.ale_tx_cmb_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
bus_dmamap_sync(sc->ale_cdata.ale_tx_ring_tag,
sc->ale_cdata.ale_tx_ring_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
}
static void
ale_init_rx_pages(struct ale_softc *sc)
{
struct ale_rx_page *rx_page;
int i;
ALE_LOCK_ASSERT(sc);
sc->ale_morework = 0;
sc->ale_cdata.ale_rx_seqno = 0;
sc->ale_cdata.ale_rx_curp = 0;
for (i = 0; i < ALE_RX_PAGES; i++) {
rx_page = &sc->ale_cdata.ale_rx_page[i];
bzero(rx_page->page_addr, sc->ale_pagesize);
bzero(rx_page->cmb_addr, ALE_RX_CMB_SZ);
rx_page->cons = 0;
*rx_page->cmb_addr = 0;
bus_dmamap_sync(rx_page->page_tag, rx_page->page_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
bus_dmamap_sync(rx_page->cmb_tag, rx_page->cmb_map,
BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
}
}
static void
ale_rxvlan(struct ale_softc *sc)
{
struct ifnet *ifp;
uint32_t reg;
ALE_LOCK_ASSERT(sc);
ifp = sc->ale_ifp;
reg = CSR_READ_4(sc, ALE_MAC_CFG);
reg &= ~MAC_CFG_VLAN_TAG_STRIP;
if ((ifp->if_capenable & IFCAP_VLAN_HWTAGGING) != 0)
reg |= MAC_CFG_VLAN_TAG_STRIP;
CSR_WRITE_4(sc, ALE_MAC_CFG, reg);
}
static void
ale_rxfilter(struct ale_softc *sc)
{
struct ifnet *ifp;
struct ifmultiaddr *ifma;
uint32_t crc;
uint32_t mchash[2];
uint32_t rxcfg;
ALE_LOCK_ASSERT(sc);
ifp = sc->ale_ifp;
rxcfg = CSR_READ_4(sc, ALE_MAC_CFG);
rxcfg &= ~(MAC_CFG_ALLMULTI | MAC_CFG_BCAST | MAC_CFG_PROMISC);
if ((ifp->if_flags & IFF_BROADCAST) != 0)
rxcfg |= MAC_CFG_BCAST;
if ((ifp->if_flags & (IFF_PROMISC | IFF_ALLMULTI)) != 0) {
if ((ifp->if_flags & IFF_PROMISC) != 0)
rxcfg |= MAC_CFG_PROMISC;
if ((ifp->if_flags & IFF_ALLMULTI) != 0)
rxcfg |= MAC_CFG_ALLMULTI;
CSR_WRITE_4(sc, ALE_MAR0, 0xFFFFFFFF);
CSR_WRITE_4(sc, ALE_MAR1, 0xFFFFFFFF);
CSR_WRITE_4(sc, ALE_MAC_CFG, rxcfg);
return;
}
/* Program new filter. */
bzero(mchash, sizeof(mchash));
if_maddr_rlock(ifp);
TAILQ_FOREACH(ifma, &sc->ale_ifp->if_multiaddrs, ifma_link) {
if (ifma->ifma_addr->sa_family != AF_LINK)
continue;
crc = ether_crc32_be(LLADDR((struct sockaddr_dl *)
ifma->ifma_addr), ETHER_ADDR_LEN);
mchash[crc >> 31] |= 1 << ((crc >> 26) & 0x1f);
}
if_maddr_runlock(ifp);
CSR_WRITE_4(sc, ALE_MAR0, mchash[0]);
CSR_WRITE_4(sc, ALE_MAR1, mchash[1]);
CSR_WRITE_4(sc, ALE_MAC_CFG, rxcfg);
}
static int
sysctl_int_range(SYSCTL_HANDLER_ARGS, int low, int high)
{
int error, value;
if (arg1 == NULL)
return (EINVAL);
value = *(int *)arg1;
error = sysctl_handle_int(oidp, &value, 0, req);
if (error || req->newptr == NULL)
return (error);
if (value < low || value > high)
return (EINVAL);
*(int *)arg1 = value;
return (0);
}
static int
sysctl_hw_ale_proc_limit(SYSCTL_HANDLER_ARGS)
{
return (sysctl_int_range(oidp, arg1, arg2, req,
ALE_PROC_MIN, ALE_PROC_MAX));
}
static int
sysctl_hw_ale_int_mod(SYSCTL_HANDLER_ARGS)
{
return (sysctl_int_range(oidp, arg1, arg2, req,
ALE_IM_TIMER_MIN, ALE_IM_TIMER_MAX));
}
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