diff options
Diffstat (limited to 'freebsd/dev/e1000/if_lem.c')
| -rw-r--r-- | freebsd/dev/e1000/if_lem.c | 4628 |
1 files changed, 4628 insertions, 0 deletions
diff --git a/freebsd/dev/e1000/if_lem.c b/freebsd/dev/e1000/if_lem.c new file mode 100644 index 00000000..5d3e9389 --- /dev/null +++ b/freebsd/dev/e1000/if_lem.c @@ -0,0 +1,4628 @@ +#include <freebsd/machine/rtems-bsd-config.h> + +/****************************************************************************** + + Copyright (c) 2001-2010, Intel Corporation + 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. + + 3. Neither the name of the Intel Corporation nor the names of its + contributors may be used to endorse or promote products derived from + this software without specific prior written permission. + + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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. + +******************************************************************************/ +/*$FreeBSD$*/ + +#ifdef HAVE_KERNEL_OPTION_HEADERS +#include <freebsd/local/opt_device_polling.h> +#include <freebsd/local/opt_inet.h> +#endif + +#include <freebsd/sys/param.h> +#include <freebsd/sys/systm.h> +#include <freebsd/sys/bus.h> +#include <freebsd/sys/endian.h> +#include <freebsd/sys/kernel.h> +#include <freebsd/sys/kthread.h> +#include <freebsd/sys/malloc.h> +#include <freebsd/sys/mbuf.h> +#include <freebsd/sys/module.h> +#include <freebsd/sys/rman.h> +#include <freebsd/sys/socket.h> +#include <freebsd/sys/sockio.h> +#include <freebsd/sys/sysctl.h> +#include <freebsd/sys/taskqueue.h> +#include <freebsd/sys/eventhandler.h> +#include <freebsd/machine/bus.h> +#include <freebsd/machine/resource.h> + +#include <freebsd/net/bpf.h> +#include <freebsd/net/ethernet.h> +#include <freebsd/net/if.h> +#include <freebsd/net/if_arp.h> +#include <freebsd/net/if_dl.h> +#include <freebsd/net/if_media.h> + +#include <freebsd/net/if_types.h> +#include <freebsd/net/if_vlan_var.h> + +#include <freebsd/netinet/in_systm.h> +#include <freebsd/netinet/in.h> +#include <freebsd/netinet/if_ether.h> +#include <freebsd/netinet/ip.h> +#include <freebsd/netinet/ip6.h> +#include <freebsd/netinet/tcp.h> +#include <freebsd/netinet/udp.h> + +#include <freebsd/machine/in_cksum.h> +#ifndef __rtems__ +#include <freebsd/dev/led/led.h> +#endif +#include <freebsd/dev/pci/pcivar.h> +#include <freebsd/dev/pci/pcireg.h> + +#ifndef __rtems__ +#include <freebsd/local/e1000_api.h> +#include <freebsd/local/if_lem.h> +#else +#include <freebsd/dev/e1000/e1000_api.h> +#include <freebsd/dev/e1000/if_lem.h> +#endif + +/********************************************************************* + * Legacy Em Driver version: + *********************************************************************/ +char lem_driver_version[] = "1.0.3"; + +/********************************************************************* + * PCI Device ID Table + * + * Used by probe to select devices to load on + * Last field stores an index into e1000_strings + * Last entry must be all 0s + * + * { Vendor ID, Device ID, SubVendor ID, SubDevice ID, String Index } + *********************************************************************/ + +static em_vendor_info_t lem_vendor_info_array[] = +{ + /* Intel(R) PRO/1000 Network Connection */ + { 0x8086, E1000_DEV_ID_82540EM, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82540EM_LOM, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82540EP, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82540EP_LOM, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82540EP_LP, PCI_ANY_ID, PCI_ANY_ID, 0}, + + { 0x8086, E1000_DEV_ID_82541EI, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82541ER, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82541ER_LOM, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82541EI_MOBILE, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82541GI, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82541GI_LF, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82541GI_MOBILE, PCI_ANY_ID, PCI_ANY_ID, 0}, + + { 0x8086, E1000_DEV_ID_82542, PCI_ANY_ID, PCI_ANY_ID, 0}, + + { 0x8086, E1000_DEV_ID_82543GC_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82543GC_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0}, + + { 0x8086, E1000_DEV_ID_82544EI_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82544EI_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82544GC_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82544GC_LOM, PCI_ANY_ID, PCI_ANY_ID, 0}, + + { 0x8086, E1000_DEV_ID_82545EM_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82545EM_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82545GM_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82545GM_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82545GM_SERDES, PCI_ANY_ID, PCI_ANY_ID, 0}, + + { 0x8086, E1000_DEV_ID_82546EB_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82546EB_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82546EB_QUAD_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82546GB_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82546GB_FIBER, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82546GB_SERDES, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82546GB_PCIE, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82546GB_QUAD_COPPER, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3, + PCI_ANY_ID, PCI_ANY_ID, 0}, + + { 0x8086, E1000_DEV_ID_82547EI, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82547EI_MOBILE, PCI_ANY_ID, PCI_ANY_ID, 0}, + { 0x8086, E1000_DEV_ID_82547GI, PCI_ANY_ID, PCI_ANY_ID, 0}, + /* required last entry */ + { 0, 0, 0, 0, 0} +}; + +/********************************************************************* + * Table of branding strings for all supported NICs. + *********************************************************************/ + +static char *lem_strings[] = { + "Intel(R) PRO/1000 Legacy Network Connection" +}; + +/********************************************************************* + * Function prototypes + *********************************************************************/ +static int lem_probe(device_t); +static int lem_attach(device_t); +static int lem_detach(device_t); +static int lem_shutdown(device_t); +static int lem_suspend(device_t); +static int lem_resume(device_t); +static void lem_start(struct ifnet *); +static void lem_start_locked(struct ifnet *ifp); +static int lem_ioctl(struct ifnet *, u_long, caddr_t); +static void lem_init(void *); +static void lem_init_locked(struct adapter *); +static void lem_stop(void *); +static void lem_media_status(struct ifnet *, struct ifmediareq *); +static int lem_media_change(struct ifnet *); +static void lem_identify_hardware(struct adapter *); +static int lem_allocate_pci_resources(struct adapter *); +static int lem_allocate_irq(struct adapter *adapter); +static void lem_free_pci_resources(struct adapter *); +static void lem_local_timer(void *); +static int lem_hardware_init(struct adapter *); +static int lem_setup_interface(device_t, struct adapter *); +static void lem_setup_transmit_structures(struct adapter *); +static void lem_initialize_transmit_unit(struct adapter *); +static int lem_setup_receive_structures(struct adapter *); +static void lem_initialize_receive_unit(struct adapter *); +static void lem_enable_intr(struct adapter *); +static void lem_disable_intr(struct adapter *); +static void lem_free_transmit_structures(struct adapter *); +static void lem_free_receive_structures(struct adapter *); +static void lem_update_stats_counters(struct adapter *); +static void lem_add_hw_stats(struct adapter *adapter); +static void lem_txeof(struct adapter *); +static void lem_tx_purge(struct adapter *); +static int lem_allocate_receive_structures(struct adapter *); +static int lem_allocate_transmit_structures(struct adapter *); +static bool lem_rxeof(struct adapter *, int, int *); +#ifndef __NO_STRICT_ALIGNMENT +static int lem_fixup_rx(struct adapter *); +#endif +static void lem_receive_checksum(struct adapter *, struct e1000_rx_desc *, + struct mbuf *); +static void lem_transmit_checksum_setup(struct adapter *, struct mbuf *, + u32 *, u32 *); +static void lem_set_promisc(struct adapter *); +static void lem_disable_promisc(struct adapter *); +static void lem_set_multi(struct adapter *); +static void lem_update_link_status(struct adapter *); +static int lem_get_buf(struct adapter *, int); +static void lem_register_vlan(void *, struct ifnet *, u16); +static void lem_unregister_vlan(void *, struct ifnet *, u16); +static void lem_setup_vlan_hw_support(struct adapter *); +static int lem_xmit(struct adapter *, struct mbuf **); +static void lem_smartspeed(struct adapter *); +static int lem_82547_fifo_workaround(struct adapter *, int); +static void lem_82547_update_fifo_head(struct adapter *, int); +static int lem_82547_tx_fifo_reset(struct adapter *); +static void lem_82547_move_tail(void *); +static int lem_dma_malloc(struct adapter *, bus_size_t, + struct em_dma_alloc *, int); +static void lem_dma_free(struct adapter *, struct em_dma_alloc *); +static int lem_sysctl_nvm_info(SYSCTL_HANDLER_ARGS); +static void lem_print_nvm_info(struct adapter *); +static int lem_is_valid_ether_addr(u8 *); +static u32 lem_fill_descriptors (bus_addr_t address, u32 length, + PDESC_ARRAY desc_array); +static int lem_sysctl_int_delay(SYSCTL_HANDLER_ARGS); +static void lem_add_int_delay_sysctl(struct adapter *, const char *, + const char *, struct em_int_delay_info *, int, int); +static void lem_set_flow_cntrl(struct adapter *, const char *, + const char *, int *, int); +/* Management and WOL Support */ +static void lem_init_manageability(struct adapter *); +static void lem_release_manageability(struct adapter *); +static void lem_get_hw_control(struct adapter *); +static void lem_release_hw_control(struct adapter *); +static void lem_get_wakeup(device_t); +static void lem_enable_wakeup(device_t); +static int lem_enable_phy_wakeup(struct adapter *); +static void lem_led_func(void *, int); + +#ifdef EM_LEGACY_IRQ +static void lem_intr(void *); +#else /* FAST IRQ */ +static int lem_irq_fast(void *); +static void lem_handle_rxtx(void *context, int pending); +static void lem_handle_link(void *context, int pending); +static void lem_add_rx_process_limit(struct adapter *, const char *, + const char *, int *, int); +#endif /* ~EM_LEGACY_IRQ */ + +#ifdef DEVICE_POLLING +static poll_handler_t lem_poll; +#endif /* POLLING */ + +/********************************************************************* + * FreeBSD Device Interface Entry Points + *********************************************************************/ + +static device_method_t lem_methods[] = { + /* Device interface */ + DEVMETHOD(device_probe, lem_probe), + DEVMETHOD(device_attach, lem_attach), + DEVMETHOD(device_detach, lem_detach), + DEVMETHOD(device_shutdown, lem_shutdown), + DEVMETHOD(device_suspend, lem_suspend), + DEVMETHOD(device_resume, lem_resume), + {0, 0} +}; + +static driver_t lem_driver = { + "em", lem_methods, sizeof(struct adapter), +}; + +extern devclass_t em_devclass; +DRIVER_MODULE(lem, pci, lem_driver, em_devclass, 0, 0); +MODULE_DEPEND(lem, pci, 1, 1, 1); +MODULE_DEPEND(lem, ether, 1, 1, 1); + +/********************************************************************* + * Tunable default values. + *********************************************************************/ + +#define EM_TICKS_TO_USECS(ticks) ((1024 * (ticks) + 500) / 1000) +#define EM_USECS_TO_TICKS(usecs) ((1000 * (usecs) + 512) / 1024) + +static int lem_tx_int_delay_dflt = EM_TICKS_TO_USECS(EM_TIDV); +static int lem_rx_int_delay_dflt = EM_TICKS_TO_USECS(EM_RDTR); +static int lem_tx_abs_int_delay_dflt = EM_TICKS_TO_USECS(EM_TADV); +static int lem_rx_abs_int_delay_dflt = EM_TICKS_TO_USECS(EM_RADV); +static int lem_rxd = EM_DEFAULT_RXD; +static int lem_txd = EM_DEFAULT_TXD; +static int lem_smart_pwr_down = FALSE; + +/* Controls whether promiscuous also shows bad packets */ +static int lem_debug_sbp = FALSE; + +TUNABLE_INT("hw.em.tx_int_delay", &lem_tx_int_delay_dflt); +TUNABLE_INT("hw.em.rx_int_delay", &lem_rx_int_delay_dflt); +TUNABLE_INT("hw.em.tx_abs_int_delay", &lem_tx_abs_int_delay_dflt); +TUNABLE_INT("hw.em.rx_abs_int_delay", &lem_rx_abs_int_delay_dflt); +TUNABLE_INT("hw.em.rxd", &lem_rxd); +TUNABLE_INT("hw.em.txd", &lem_txd); +TUNABLE_INT("hw.em.smart_pwr_down", &lem_smart_pwr_down); +TUNABLE_INT("hw.em.sbp", &lem_debug_sbp); + +#ifndef EM_LEGACY_IRQ +/* How many packets rxeof tries to clean at a time */ +static int lem_rx_process_limit = 100; +TUNABLE_INT("hw.em.rx_process_limit", &lem_rx_process_limit); +#endif + +/* Flow control setting - default to FULL */ +static int lem_fc_setting = e1000_fc_full; +TUNABLE_INT("hw.em.fc_setting", &lem_fc_setting); + +/* Global used in WOL setup with multiport cards */ +static int global_quad_port_a = 0; + +/********************************************************************* + * Device identification routine + * + * em_probe determines if the driver should be loaded on + * adapter based on PCI vendor/device id of the adapter. + * + * return BUS_PROBE_DEFAULT on success, positive on failure + *********************************************************************/ + +static int +lem_probe(device_t dev) +{ + char adapter_name[60]; + u16 pci_vendor_id = 0; + u16 pci_device_id = 0; + u16 pci_subvendor_id = 0; + u16 pci_subdevice_id = 0; + em_vendor_info_t *ent; + + INIT_DEBUGOUT("em_probe: begin"); + + pci_vendor_id = pci_get_vendor(dev); + if (pci_vendor_id != EM_VENDOR_ID) + return (ENXIO); + + pci_device_id = pci_get_device(dev); + pci_subvendor_id = pci_get_subvendor(dev); + pci_subdevice_id = pci_get_subdevice(dev); + + ent = lem_vendor_info_array; + while (ent->vendor_id != 0) { + if ((pci_vendor_id == ent->vendor_id) && + (pci_device_id == ent->device_id) && + + ((pci_subvendor_id == ent->subvendor_id) || + (ent->subvendor_id == PCI_ANY_ID)) && + + ((pci_subdevice_id == ent->subdevice_id) || + (ent->subdevice_id == PCI_ANY_ID))) { + sprintf(adapter_name, "%s %s", + lem_strings[ent->index], + lem_driver_version); + device_set_desc_copy(dev, adapter_name); + return (BUS_PROBE_DEFAULT); + } + ent++; + } + + return (ENXIO); +} + +/********************************************************************* + * Device initialization routine + * + * The attach entry point is called when the driver is being loaded. + * This routine identifies the type of hardware, allocates all resources + * and initializes the hardware. + * + * return 0 on success, positive on failure + *********************************************************************/ + +static int +lem_attach(device_t dev) +{ + struct adapter *adapter; + int tsize, rsize; + int error = 0; + + INIT_DEBUGOUT("lem_attach: begin"); + + adapter = device_get_softc(dev); + adapter->dev = adapter->osdep.dev = dev; + EM_CORE_LOCK_INIT(adapter, device_get_nameunit(dev)); + EM_TX_LOCK_INIT(adapter, device_get_nameunit(dev)); + EM_RX_LOCK_INIT(adapter, device_get_nameunit(dev)); + + /* SYSCTL stuff */ + SYSCTL_ADD_PROC(device_get_sysctl_ctx(dev), + SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), + OID_AUTO, "nvm", CTLTYPE_INT|CTLFLAG_RW, adapter, 0, + lem_sysctl_nvm_info, "I", "NVM Information"); + + callout_init_mtx(&adapter->timer, &adapter->core_mtx, 0); + callout_init_mtx(&adapter->tx_fifo_timer, &adapter->tx_mtx, 0); + + /* Determine hardware and mac info */ + lem_identify_hardware(adapter); + + /* Setup PCI resources */ + if (lem_allocate_pci_resources(adapter)) { + device_printf(dev, "Allocation of PCI resources failed\n"); + error = ENXIO; + goto err_pci; + } + + /* Do Shared Code initialization */ + if (e1000_setup_init_funcs(&adapter->hw, TRUE)) { + device_printf(dev, "Setup of Shared code failed\n"); + error = ENXIO; + goto err_pci; + } + + e1000_get_bus_info(&adapter->hw); + + /* Set up some sysctls for the tunable interrupt delays */ + lem_add_int_delay_sysctl(adapter, "rx_int_delay", + "receive interrupt delay in usecs", &adapter->rx_int_delay, + E1000_REGISTER(&adapter->hw, E1000_RDTR), lem_rx_int_delay_dflt); + lem_add_int_delay_sysctl(adapter, "tx_int_delay", + "transmit interrupt delay in usecs", &adapter->tx_int_delay, + E1000_REGISTER(&adapter->hw, E1000_TIDV), lem_tx_int_delay_dflt); + if (adapter->hw.mac.type >= e1000_82540) { + lem_add_int_delay_sysctl(adapter, "rx_abs_int_delay", + "receive interrupt delay limit in usecs", + &adapter->rx_abs_int_delay, + E1000_REGISTER(&adapter->hw, E1000_RADV), + lem_rx_abs_int_delay_dflt); + lem_add_int_delay_sysctl(adapter, "tx_abs_int_delay", + "transmit interrupt delay limit in usecs", + &adapter->tx_abs_int_delay, + E1000_REGISTER(&adapter->hw, E1000_TADV), + lem_tx_abs_int_delay_dflt); + } + +#ifndef EM_LEGACY_IRQ + /* Sysctls for limiting the amount of work done in the taskqueue */ + lem_add_rx_process_limit(adapter, "rx_processing_limit", + "max number of rx packets to process", &adapter->rx_process_limit, + lem_rx_process_limit); +#endif + + /* Sysctl for setting the interface flow control */ + lem_set_flow_cntrl(adapter, "flow_control", + "max number of rx packets to process", + &adapter->fc_setting, lem_fc_setting); + + /* + * Validate number of transmit and receive descriptors. It + * must not exceed hardware maximum, and must be multiple + * of E1000_DBA_ALIGN. + */ + if (((lem_txd * sizeof(struct e1000_tx_desc)) % EM_DBA_ALIGN) != 0 || + (adapter->hw.mac.type >= e1000_82544 && lem_txd > EM_MAX_TXD) || + (adapter->hw.mac.type < e1000_82544 && lem_txd > EM_MAX_TXD_82543) || + (lem_txd < EM_MIN_TXD)) { + device_printf(dev, "Using %d TX descriptors instead of %d!\n", + EM_DEFAULT_TXD, lem_txd); + adapter->num_tx_desc = EM_DEFAULT_TXD; + } else + adapter->num_tx_desc = lem_txd; + if (((lem_rxd * sizeof(struct e1000_rx_desc)) % EM_DBA_ALIGN) != 0 || + (adapter->hw.mac.type >= e1000_82544 && lem_rxd > EM_MAX_RXD) || + (adapter->hw.mac.type < e1000_82544 && lem_rxd > EM_MAX_RXD_82543) || + (lem_rxd < EM_MIN_RXD)) { + device_printf(dev, "Using %d RX descriptors instead of %d!\n", + EM_DEFAULT_RXD, lem_rxd); + adapter->num_rx_desc = EM_DEFAULT_RXD; + } else + adapter->num_rx_desc = lem_rxd; + + adapter->hw.mac.autoneg = DO_AUTO_NEG; + adapter->hw.phy.autoneg_wait_to_complete = FALSE; + adapter->hw.phy.autoneg_advertised = AUTONEG_ADV_DEFAULT; + adapter->rx_buffer_len = 2048; + + e1000_init_script_state_82541(&adapter->hw, TRUE); + e1000_set_tbi_compatibility_82543(&adapter->hw, TRUE); + + /* Copper options */ + if (adapter->hw.phy.media_type == e1000_media_type_copper) { + adapter->hw.phy.mdix = AUTO_ALL_MODES; + adapter->hw.phy.disable_polarity_correction = FALSE; + adapter->hw.phy.ms_type = EM_MASTER_SLAVE; + } + + /* + * Set the frame limits assuming + * standard ethernet sized frames. + */ + adapter->max_frame_size = ETHERMTU + ETHER_HDR_LEN + ETHERNET_FCS_SIZE; + adapter->min_frame_size = ETH_ZLEN + ETHERNET_FCS_SIZE; + + /* + * This controls when hardware reports transmit completion + * status. + */ + adapter->hw.mac.report_tx_early = 1; + + tsize = roundup2(adapter->num_tx_desc * sizeof(struct e1000_tx_desc), + EM_DBA_ALIGN); + + /* Allocate Transmit Descriptor ring */ + if (lem_dma_malloc(adapter, tsize, &adapter->txdma, BUS_DMA_NOWAIT)) { + device_printf(dev, "Unable to allocate tx_desc memory\n"); + error = ENOMEM; + goto err_tx_desc; + } + adapter->tx_desc_base = + (struct e1000_tx_desc *)adapter->txdma.dma_vaddr; + + rsize = roundup2(adapter->num_rx_desc * sizeof(struct e1000_rx_desc), + EM_DBA_ALIGN); + + /* Allocate Receive Descriptor ring */ + if (lem_dma_malloc(adapter, rsize, &adapter->rxdma, BUS_DMA_NOWAIT)) { + device_printf(dev, "Unable to allocate rx_desc memory\n"); + error = ENOMEM; + goto err_rx_desc; + } + adapter->rx_desc_base = + (struct e1000_rx_desc *)adapter->rxdma.dma_vaddr; + + /* Allocate multicast array memory. */ + adapter->mta = malloc(sizeof(u8) * ETH_ADDR_LEN * + MAX_NUM_MULTICAST_ADDRESSES, M_DEVBUF, M_NOWAIT); + if (adapter->mta == NULL) { + device_printf(dev, "Can not allocate multicast setup array\n"); + error = ENOMEM; + goto err_hw_init; + } + + /* + ** Start from a known state, this is + ** important in reading the nvm and + ** mac from that. + */ + e1000_reset_hw(&adapter->hw); + + /* Make sure we have a good EEPROM before we read from it */ + if (e1000_validate_nvm_checksum(&adapter->hw) < 0) { + /* + ** Some PCI-E parts fail the first check due to + ** the link being in sleep state, call it again, + ** if it fails a second time its a real issue. + */ + if (e1000_validate_nvm_checksum(&adapter->hw) < 0) { + device_printf(dev, + "The EEPROM Checksum Is Not Valid\n"); + error = EIO; + goto err_hw_init; + } + } + + /* Copy the permanent MAC address out of the EEPROM */ + if (e1000_read_mac_addr(&adapter->hw) < 0) { + device_printf(dev, "EEPROM read error while reading MAC" + " address\n"); + error = EIO; + goto err_hw_init; + } + + if (!lem_is_valid_ether_addr(adapter->hw.mac.addr)) { + device_printf(dev, "Invalid MAC address\n"); + error = EIO; + goto err_hw_init; + } + + /* Initialize the hardware */ + if (lem_hardware_init(adapter)) { + device_printf(dev, "Unable to initialize the hardware\n"); + error = EIO; + goto err_hw_init; + } + + /* Allocate transmit descriptors and buffers */ + if (lem_allocate_transmit_structures(adapter)) { + device_printf(dev, "Could not setup transmit structures\n"); + error = ENOMEM; + goto err_tx_struct; + } + + /* Allocate receive descriptors and buffers */ + if (lem_allocate_receive_structures(adapter)) { + device_printf(dev, "Could not setup receive structures\n"); + error = ENOMEM; + goto err_rx_struct; + } + + /* + ** Do interrupt configuration + */ + error = lem_allocate_irq(adapter); + if (error) + goto err_rx_struct; + + /* + * Get Wake-on-Lan and Management info for later use + */ + lem_get_wakeup(dev); + + /* Setup OS specific network interface */ + if (lem_setup_interface(dev, adapter) != 0) + goto err_rx_struct; + + /* Initialize statistics */ + lem_update_stats_counters(adapter); + + adapter->hw.mac.get_link_status = 1; + lem_update_link_status(adapter); + + /* Indicate SOL/IDER usage */ + if (e1000_check_reset_block(&adapter->hw)) + device_printf(dev, + "PHY reset is blocked due to SOL/IDER session.\n"); + + /* Do we need workaround for 82544 PCI-X adapter? */ + if (adapter->hw.bus.type == e1000_bus_type_pcix && + adapter->hw.mac.type == e1000_82544) + adapter->pcix_82544 = TRUE; + else + adapter->pcix_82544 = FALSE; + + /* Register for VLAN events */ + adapter->vlan_attach = EVENTHANDLER_REGISTER(vlan_config, + lem_register_vlan, adapter, EVENTHANDLER_PRI_FIRST); + adapter->vlan_detach = EVENTHANDLER_REGISTER(vlan_unconfig, + lem_unregister_vlan, adapter, EVENTHANDLER_PRI_FIRST); + + lem_add_hw_stats(adapter); + + /* Non-AMT based hardware can now take control from firmware */ + if (adapter->has_manage && !adapter->has_amt) + lem_get_hw_control(adapter); + + /* Tell the stack that the interface is not active */ + adapter->ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); + + adapter->led_dev = led_create(lem_led_func, adapter, + device_get_nameunit(dev)); + + INIT_DEBUGOUT("lem_attach: end"); + + return (0); + +err_rx_struct: + lem_free_transmit_structures(adapter); +err_tx_struct: +err_hw_init: + lem_release_hw_control(adapter); + lem_dma_free(adapter, &adapter->rxdma); +err_rx_desc: + lem_dma_free(adapter, &adapter->txdma); +err_tx_desc: +err_pci: + if (adapter->ifp != NULL) + if_free(adapter->ifp); + lem_free_pci_resources(adapter); + free(adapter->mta, M_DEVBUF); + EM_TX_LOCK_DESTROY(adapter); + EM_RX_LOCK_DESTROY(adapter); + EM_CORE_LOCK_DESTROY(adapter); + + return (error); +} + +/********************************************************************* + * Device removal routine + * + * The detach entry point is called when the driver is being removed. + * This routine stops the adapter and deallocates all the resources + * that were allocated for driver operation. + * + * return 0 on success, positive on failure + *********************************************************************/ + +static int +lem_detach(device_t dev) +{ + struct adapter *adapter = device_get_softc(dev); + struct ifnet *ifp = adapter->ifp; + + INIT_DEBUGOUT("em_detach: begin"); + + /* Make sure VLANS are not using driver */ + if (adapter->ifp->if_vlantrunk != NULL) { + device_printf(dev,"Vlan in use, detach first\n"); + return (EBUSY); + } + +#ifdef DEVICE_POLLING + if (ifp->if_capenable & IFCAP_POLLING) + ether_poll_deregister(ifp); +#endif + + if (adapter->led_dev != NULL) + led_destroy(adapter->led_dev); + + EM_CORE_LOCK(adapter); + EM_TX_LOCK(adapter); + adapter->in_detach = 1; + lem_stop(adapter); + e1000_phy_hw_reset(&adapter->hw); + + lem_release_manageability(adapter); + + EM_TX_UNLOCK(adapter); + EM_CORE_UNLOCK(adapter); + + /* Unregister VLAN events */ + if (adapter->vlan_attach != NULL) + EVENTHANDLER_DEREGISTER(vlan_config, adapter->vlan_attach); + if (adapter->vlan_detach != NULL) + EVENTHANDLER_DEREGISTER(vlan_unconfig, adapter->vlan_detach); + + ether_ifdetach(adapter->ifp); + callout_drain(&adapter->timer); + callout_drain(&adapter->tx_fifo_timer); + + lem_free_pci_resources(adapter); + bus_generic_detach(dev); + if_free(ifp); + + lem_free_transmit_structures(adapter); + lem_free_receive_structures(adapter); + + /* Free Transmit Descriptor ring */ + if (adapter->tx_desc_base) { + lem_dma_free(adapter, &adapter->txdma); + adapter->tx_desc_base = NULL; + } + + /* Free Receive Descriptor ring */ + if (adapter->rx_desc_base) { + lem_dma_free(adapter, &adapter->rxdma); + adapter->rx_desc_base = NULL; + } + + lem_release_hw_control(adapter); + free(adapter->mta, M_DEVBUF); + EM_TX_LOCK_DESTROY(adapter); + EM_RX_LOCK_DESTROY(adapter); + EM_CORE_LOCK_DESTROY(adapter); + + return (0); +} + +/********************************************************************* + * + * Shutdown entry point + * + **********************************************************************/ + +static int +lem_shutdown(device_t dev) +{ + return lem_suspend(dev); +} + +/* + * Suspend/resume device methods. + */ +static int +lem_suspend(device_t dev) +{ + struct adapter *adapter = device_get_softc(dev); + + EM_CORE_LOCK(adapter); + + lem_release_manageability(adapter); + lem_release_hw_control(adapter); + lem_enable_wakeup(dev); + + EM_CORE_UNLOCK(adapter); + + return bus_generic_suspend(dev); +} + +static int +lem_resume(device_t dev) +{ + struct adapter *adapter = device_get_softc(dev); + struct ifnet *ifp = adapter->ifp; + + EM_CORE_LOCK(adapter); + lem_init_locked(adapter); + lem_init_manageability(adapter); + EM_CORE_UNLOCK(adapter); + lem_start(ifp); + + return bus_generic_resume(dev); +} + + +static void +lem_start_locked(struct ifnet *ifp) +{ + struct adapter *adapter = ifp->if_softc; + struct mbuf *m_head; + + EM_TX_LOCK_ASSERT(adapter); + + if ((ifp->if_drv_flags & (IFF_DRV_RUNNING|IFF_DRV_OACTIVE)) != + IFF_DRV_RUNNING) + return; + if (!adapter->link_active) + return; + + /* + * Force a cleanup if number of TX descriptors + * available hits the threshold + */ + if (adapter->num_tx_desc_avail <= EM_TX_CLEANUP_THRESHOLD) { + lem_txeof(adapter); + /* Now do we at least have a minimal? */ + if (adapter->num_tx_desc_avail <= EM_TX_OP_THRESHOLD) { + adapter->no_tx_desc_avail1++; + return; + } + } + + while (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) { + + IFQ_DRV_DEQUEUE(&ifp->if_snd, m_head); + if (m_head == NULL) + break; + /* + * Encapsulation can modify our pointer, and or make it + * NULL on failure. In that event, we can't requeue. + */ + if (lem_xmit(adapter, &m_head)) { + if (m_head == NULL) + break; + ifp->if_drv_flags |= IFF_DRV_OACTIVE; + IFQ_DRV_PREPEND(&ifp->if_snd, m_head); + break; + } + + /* Send a copy of the frame to the BPF listener */ + ETHER_BPF_MTAP(ifp, m_head); + + /* Set timeout in case hardware has problems transmitting. */ + adapter->watchdog_check = TRUE; + adapter->watchdog_time = ticks; + } + if (adapter->num_tx_desc_avail <= EM_TX_OP_THRESHOLD) + ifp->if_drv_flags |= IFF_DRV_OACTIVE; + + return; +} + +static void +lem_start(struct ifnet *ifp) +{ + struct adapter *adapter = ifp->if_softc; + + EM_TX_LOCK(adapter); + if (ifp->if_drv_flags & IFF_DRV_RUNNING) + lem_start_locked(ifp); + EM_TX_UNLOCK(adapter); +} + +/********************************************************************* + * Ioctl entry point + * + * em_ioctl is called when the user wants to configure the + * interface. + * + * return 0 on success, positive on failure + **********************************************************************/ + +static int +lem_ioctl(struct ifnet *ifp, u_long command, caddr_t data) +{ + struct adapter *adapter = ifp->if_softc; + struct ifreq *ifr = (struct ifreq *)data; +#ifdef INET + struct ifaddr *ifa = (struct ifaddr *)data; +#endif + int error = 0; + + if (adapter->in_detach) + return (error); + + switch (command) { + case SIOCSIFADDR: +#ifdef INET + if (ifa->ifa_addr->sa_family == AF_INET) { + /* + * XXX + * Since resetting hardware takes a very long time + * and results in link renegotiation we only + * initialize the hardware only when it is absolutely + * required. + */ + ifp->if_flags |= IFF_UP; + if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) { + EM_CORE_LOCK(adapter); + lem_init_locked(adapter); + EM_CORE_UNLOCK(adapter); + } + arp_ifinit(ifp, ifa); + } else +#endif + error = ether_ioctl(ifp, command, data); + break; + case SIOCSIFMTU: + { + int max_frame_size; + + IOCTL_DEBUGOUT("ioctl rcv'd: SIOCSIFMTU (Set Interface MTU)"); + + EM_CORE_LOCK(adapter); + switch (adapter->hw.mac.type) { + case e1000_82542: + max_frame_size = ETHER_MAX_LEN; + break; + default: + max_frame_size = MAX_JUMBO_FRAME_SIZE; + } + if (ifr->ifr_mtu > max_frame_size - ETHER_HDR_LEN - + ETHER_CRC_LEN) { + EM_CORE_UNLOCK(adapter); + error = EINVAL; + break; + } + + ifp->if_mtu = ifr->ifr_mtu; + adapter->max_frame_size = + ifp->if_mtu + ETHER_HDR_LEN + ETHER_CRC_LEN; + lem_init_locked(adapter); + EM_CORE_UNLOCK(adapter); + break; + } + case SIOCSIFFLAGS: + IOCTL_DEBUGOUT("ioctl rcv'd:\ + SIOCSIFFLAGS (Set Interface Flags)"); + EM_CORE_LOCK(adapter); + if (ifp->if_flags & IFF_UP) { + if ((ifp->if_drv_flags & IFF_DRV_RUNNING)) { + if ((ifp->if_flags ^ adapter->if_flags) & + (IFF_PROMISC | IFF_ALLMULTI)) { + lem_disable_promisc(adapter); + lem_set_promisc(adapter); + } + } else + lem_init_locked(adapter); + } else + if (ifp->if_drv_flags & IFF_DRV_RUNNING) { + EM_TX_LOCK(adapter); + lem_stop(adapter); + EM_TX_UNLOCK(adapter); + } + adapter->if_flags = ifp->if_flags; + EM_CORE_UNLOCK(adapter); + break; + case SIOCADDMULTI: + case SIOCDELMULTI: + IOCTL_DEBUGOUT("ioctl rcv'd: SIOC(ADD|DEL)MULTI"); + if (ifp->if_drv_flags & IFF_DRV_RUNNING) { + EM_CORE_LOCK(adapter); + lem_disable_intr(adapter); + lem_set_multi(adapter); + if (adapter->hw.mac.type == e1000_82542 && + adapter->hw.revision_id == E1000_REVISION_2) { + lem_initialize_receive_unit(adapter); + } +#ifdef DEVICE_POLLING + if (!(ifp->if_capenable & IFCAP_POLLING)) +#endif + lem_enable_intr(adapter); + EM_CORE_UNLOCK(adapter); + } + break; + case SIOCSIFMEDIA: + /* Check SOL/IDER usage */ + EM_CORE_LOCK(adapter); + if (e1000_check_reset_block(&adapter->hw)) { + EM_CORE_UNLOCK(adapter); + device_printf(adapter->dev, "Media change is" + " blocked due to SOL/IDER session.\n"); + break; + } + EM_CORE_UNLOCK(adapter); + case SIOCGIFMEDIA: + IOCTL_DEBUGOUT("ioctl rcv'd: \ + SIOCxIFMEDIA (Get/Set Interface Media)"); + error = ifmedia_ioctl(ifp, ifr, &adapter->media, command); + break; + case SIOCSIFCAP: + { + int mask, reinit; + + IOCTL_DEBUGOUT("ioctl rcv'd: SIOCSIFCAP (Set Capabilities)"); + reinit = 0; + mask = ifr->ifr_reqcap ^ ifp->if_capenable; +#ifdef DEVICE_POLLING + if (mask & IFCAP_POLLING) { + if (ifr->ifr_reqcap & IFCAP_POLLING) { + error = ether_poll_register(lem_poll, ifp); + if (error) + return (error); + EM_CORE_LOCK(adapter); + lem_disable_intr(adapter); + ifp->if_capenable |= IFCAP_POLLING; + EM_CORE_UNLOCK(adapter); + } else { + error = ether_poll_deregister(ifp); + /* Enable interrupt even in error case */ + EM_CORE_LOCK(adapter); + lem_enable_intr(adapter); + ifp->if_capenable &= ~IFCAP_POLLING; + EM_CORE_UNLOCK(adapter); + } + } +#endif + if (mask & IFCAP_HWCSUM) { + ifp->if_capenable ^= IFCAP_HWCSUM; + reinit = 1; + } + if (mask & IFCAP_VLAN_HWTAGGING) { + ifp->if_capenable ^= IFCAP_VLAN_HWTAGGING; + reinit = 1; + } + if ((mask & IFCAP_WOL) && + (ifp->if_capabilities & IFCAP_WOL) != 0) { + if (mask & IFCAP_WOL_MCAST) + ifp->if_capenable ^= IFCAP_WOL_MCAST; + if (mask & IFCAP_WOL_MAGIC) + ifp->if_capenable ^= IFCAP_WOL_MAGIC; + } + if (reinit && (ifp->if_drv_flags & IFF_DRV_RUNNING)) + lem_init(adapter); + VLAN_CAPABILITIES(ifp); + break; + } + + default: + error = ether_ioctl(ifp, command, data); + break; + } + + return (error); +} + + +/********************************************************************* + * Init entry point + * + * This routine is used in two ways. It is used by the stack as + * init entry point in network interface structure. It is also used + * by the driver as a hw/sw initialization routine to get to a + * consistent state. + * + * return 0 on success, positive on failure + **********************************************************************/ + +static void +lem_init_locked(struct adapter *adapter) +{ + struct ifnet *ifp = adapter->ifp; + device_t dev = adapter->dev; + u32 pba; + + INIT_DEBUGOUT("lem_init: begin"); + + EM_CORE_LOCK_ASSERT(adapter); + + EM_TX_LOCK(adapter); + lem_stop(adapter); + EM_TX_UNLOCK(adapter); + + /* + * Packet Buffer Allocation (PBA) + * Writing PBA sets the receive portion of the buffer + * the remainder is used for the transmit buffer. + * + * Devices before the 82547 had a Packet Buffer of 64K. + * Default allocation: PBA=48K for Rx, leaving 16K for Tx. + * After the 82547 the buffer was reduced to 40K. + * Default allocation: PBA=30K for Rx, leaving 10K for Tx. + * Note: default does not leave enough room for Jumbo Frame >10k. + */ + switch (adapter->hw.mac.type) { + case e1000_82547: + case e1000_82547_rev_2: /* 82547: Total Packet Buffer is 40K */ + if (adapter->max_frame_size > 8192) + pba = E1000_PBA_22K; /* 22K for Rx, 18K for Tx */ + else + pba = E1000_PBA_30K; /* 30K for Rx, 10K for Tx */ + adapter->tx_fifo_head = 0; + adapter->tx_head_addr = pba << EM_TX_HEAD_ADDR_SHIFT; + adapter->tx_fifo_size = + (E1000_PBA_40K - pba) << EM_PBA_BYTES_SHIFT; + break; + default: + /* Devices before 82547 had a Packet Buffer of 64K. */ + if (adapter->max_frame_size > 8192) + pba = E1000_PBA_40K; /* 40K for Rx, 24K for Tx */ + else + pba = E1000_PBA_48K; /* 48K for Rx, 16K for Tx */ + } + + INIT_DEBUGOUT1("lem_init: pba=%dK",pba); + E1000_WRITE_REG(&adapter->hw, E1000_PBA, pba); + + /* Get the latest mac address, User can use a LAA */ + bcopy(IF_LLADDR(adapter->ifp), adapter->hw.mac.addr, + ETHER_ADDR_LEN); + + /* Put the address into the Receive Address Array */ + e1000_rar_set(&adapter->hw, adapter->hw.mac.addr, 0); + + /* Initialize the hardware */ + if (lem_hardware_init(adapter)) { + device_printf(dev, "Unable to initialize the hardware\n"); + return; + } + lem_update_link_status(adapter); + + /* Setup VLAN support, basic and offload if available */ + E1000_WRITE_REG(&adapter->hw, E1000_VET, ETHERTYPE_VLAN); + + /* Set hardware offload abilities */ + ifp->if_hwassist = 0; + if (adapter->hw.mac.type >= e1000_82543) { + if (ifp->if_capenable & IFCAP_TXCSUM) + ifp->if_hwassist |= (CSUM_TCP | CSUM_UDP); + } + + /* Configure for OS presence */ + lem_init_manageability(adapter); + + /* Prepare transmit descriptors and buffers */ + lem_setup_transmit_structures(adapter); + lem_initialize_transmit_unit(adapter); + + /* Setup Multicast table */ + lem_set_multi(adapter); + + /* Prepare receive descriptors and buffers */ + if (lem_setup_receive_structures(adapter)) { + device_printf(dev, "Could not setup receive structures\n"); + EM_TX_LOCK(adapter); + lem_stop(adapter); + EM_TX_UNLOCK(adapter); + return; + } + lem_initialize_receive_unit(adapter); + + /* Use real VLAN Filter support? */ + if (ifp->if_capenable & IFCAP_VLAN_HWTAGGING) { + if (ifp->if_capenable & IFCAP_VLAN_HWFILTER) + /* Use real VLAN Filter support */ + lem_setup_vlan_hw_support(adapter); + else { + u32 ctrl; + ctrl = E1000_READ_REG(&adapter->hw, E1000_CTRL); + ctrl |= E1000_CTRL_VME; + E1000_WRITE_REG(&adapter->hw, E1000_CTRL, ctrl); + } + } + + /* Don't lose promiscuous settings */ + lem_set_promisc(adapter); + + ifp->if_drv_flags |= IFF_DRV_RUNNING; + ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; + + callout_reset(&adapter->timer, hz, lem_local_timer, adapter); + e1000_clear_hw_cntrs_base_generic(&adapter->hw); + + /* MSI/X configuration for 82574 */ + if (adapter->hw.mac.type == e1000_82574) { + int tmp; + tmp = E1000_READ_REG(&adapter->hw, E1000_CTRL_EXT); + tmp |= E1000_CTRL_EXT_PBA_CLR; + E1000_WRITE_REG(&adapter->hw, E1000_CTRL_EXT, tmp); + /* + ** Set the IVAR - interrupt vector routing. + ** Each nibble represents a vector, high bit + ** is enable, other 3 bits are the MSIX table + ** entry, we map RXQ0 to 0, TXQ0 to 1, and + ** Link (other) to 2, hence the magic number. + */ + E1000_WRITE_REG(&adapter->hw, E1000_IVAR, 0x800A0908); + } + +#ifdef DEVICE_POLLING + /* + * Only enable interrupts if we are not polling, make sure + * they are off otherwise. + */ + if (ifp->if_capenable & IFCAP_POLLING) + lem_disable_intr(adapter); + else +#endif /* DEVICE_POLLING */ + lem_enable_intr(adapter); + + /* AMT based hardware can now take control from firmware */ + if (adapter->has_manage && adapter->has_amt) + lem_get_hw_control(adapter); + + /* Don't reset the phy next time init gets called */ + adapter->hw.phy.reset_disable = TRUE; +} + +static void +lem_init(void *arg) +{ + struct adapter *adapter = arg; + + EM_CORE_LOCK(adapter); + lem_init_locked(adapter); + EM_CORE_UNLOCK(adapter); +} + + +#ifdef DEVICE_POLLING +/********************************************************************* + * + * Legacy polling routine + * + *********************************************************************/ +static int +lem_poll(struct ifnet *ifp, enum poll_cmd cmd, int count) +{ + struct adapter *adapter = ifp->if_softc; + u32 reg_icr, rx_done = 0; + + EM_CORE_LOCK(adapter); + if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) { + EM_CORE_UNLOCK(adapter); + return (rx_done); + } + + if (cmd == POLL_AND_CHECK_STATUS) { + reg_icr = E1000_READ_REG(&adapter->hw, E1000_ICR); + if (reg_icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) { + callout_stop(&adapter->timer); + adapter->hw.mac.get_link_status = 1; + lem_update_link_status(adapter); + callout_reset(&adapter->timer, hz, + lem_local_timer, adapter); + } + } + EM_CORE_UNLOCK(adapter); + + lem_rxeof(adapter, count, &rx_done); + + EM_TX_LOCK(adapter); + lem_txeof(adapter); + if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) + lem_start_locked(ifp); + EM_TX_UNLOCK(adapter); + return (rx_done); +} +#endif /* DEVICE_POLLING */ + +#ifdef EM_LEGACY_IRQ +/********************************************************************* + * + * Legacy Interrupt Service routine + * + *********************************************************************/ +static void +lem_intr(void *arg) +{ + struct adapter *adapter = arg; + struct ifnet *ifp = adapter->ifp; + u32 reg_icr; + + + if (ifp->if_capenable & IFCAP_POLLING) + return; + + EM_CORE_LOCK(adapter); + reg_icr = E1000_READ_REG(&adapter->hw, E1000_ICR); + if (reg_icr & E1000_ICR_RXO) + adapter->rx_overruns++; + + if ((reg_icr == 0xffffffff) || (reg_icr == 0)) + goto out; + + if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) + goto out; + + if (reg_icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) { + callout_stop(&adapter->timer); + adapter->hw.mac.get_link_status = 1; + lem_update_link_status(adapter); + /* Deal with TX cruft when link lost */ + lem_tx_purge(adapter); + callout_reset(&adapter->timer, hz, + lem_local_timer, adapter); + goto out; + } + + EM_TX_LOCK(adapter); + lem_rxeof(adapter, -1, NULL); + lem_txeof(adapter); + if (ifp->if_drv_flags & IFF_DRV_RUNNING && + !IFQ_DRV_IS_EMPTY(&ifp->if_snd)) + lem_start_locked(ifp); + EM_TX_UNLOCK(adapter); + +out: + EM_CORE_UNLOCK(adapter); + return; +} + +#else /* EM_FAST_IRQ, then fast interrupt routines only */ + +static void +lem_handle_link(void *context, int pending) +{ + struct adapter *adapter = context; + struct ifnet *ifp = adapter->ifp; + + if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) + return; + + EM_CORE_LOCK(adapter); + callout_stop(&adapter->timer); + lem_update_link_status(adapter); + /* Deal with TX cruft when link lost */ + lem_tx_purge(adapter); + callout_reset(&adapter->timer, hz, lem_local_timer, adapter); + EM_CORE_UNLOCK(adapter); +} + + +/* Combined RX/TX handler, used by Legacy and MSI */ +static void +lem_handle_rxtx(void *context, int pending) +{ + struct adapter *adapter = context; + struct ifnet *ifp = adapter->ifp; + + + if (ifp->if_drv_flags & IFF_DRV_RUNNING) { + lem_rxeof(adapter, adapter->rx_process_limit, NULL); + EM_TX_LOCK(adapter); + lem_txeof(adapter); + if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd)) + lem_start_locked(ifp); + EM_TX_UNLOCK(adapter); + } + + if (ifp->if_drv_flags & IFF_DRV_RUNNING) + lem_enable_intr(adapter); +} + +/********************************************************************* + * + * Fast Legacy/MSI Combined Interrupt Service routine + * + *********************************************************************/ +static int +lem_irq_fast(void *arg) +{ + struct adapter *adapter = arg; + struct ifnet *ifp; + u32 reg_icr; + + ifp = adapter->ifp; + + reg_icr = E1000_READ_REG(&adapter->hw, E1000_ICR); + + /* Hot eject? */ + if (reg_icr == 0xffffffff) + return FILTER_STRAY; + + /* Definitely not our interrupt. */ + if (reg_icr == 0x0) + return FILTER_STRAY; + + /* + * Mask interrupts until the taskqueue is finished running. This is + * cheap, just assume that it is needed. This also works around the + * MSI message reordering errata on certain systems. + */ + lem_disable_intr(adapter); + taskqueue_enqueue(adapter->tq, &adapter->rxtx_task); + + /* Link status change */ + if (reg_icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) { + adapter->hw.mac.get_link_status = 1; + taskqueue_enqueue(taskqueue_fast, &adapter->link_task); + } + + if (reg_icr & E1000_ICR_RXO) + adapter->rx_overruns++; + return FILTER_HANDLED; +} +#endif /* ~EM_LEGACY_IRQ */ + + +/********************************************************************* + * + * Media Ioctl callback + * + * This routine is called whenever the user queries the status of + * the interface using ifconfig. + * + **********************************************************************/ +static void +lem_media_status(struct ifnet *ifp, struct ifmediareq *ifmr) +{ + struct adapter *adapter = ifp->if_softc; + u_char fiber_type = IFM_1000_SX; + + INIT_DEBUGOUT("lem_media_status: begin"); + + EM_CORE_LOCK(adapter); + lem_update_link_status(adapter); + + ifmr->ifm_status = IFM_AVALID; + ifmr->ifm_active = IFM_ETHER; + + if (!adapter->link_active) { + EM_CORE_UNLOCK(adapter); + return; + } + + ifmr->ifm_status |= IFM_ACTIVE; + + if ((adapter->hw.phy.media_type == e1000_media_type_fiber) || + (adapter->hw.phy.media_type == e1000_media_type_internal_serdes)) { + if (adapter->hw.mac.type == e1000_82545) + fiber_type = IFM_1000_LX; + ifmr->ifm_active |= fiber_type | IFM_FDX; + } else { + switch (adapter->link_speed) { + case 10: + ifmr->ifm_active |= IFM_10_T; + break; + case 100: + ifmr->ifm_active |= IFM_100_TX; + break; + case 1000: + ifmr->ifm_active |= IFM_1000_T; + break; + } + if (adapter->link_duplex == FULL_DUPLEX) + ifmr->ifm_active |= IFM_FDX; + else + ifmr->ifm_active |= IFM_HDX; + } + EM_CORE_UNLOCK(adapter); +} + +/********************************************************************* + * + * Media Ioctl callback + * + * This routine is called when the user changes speed/duplex using + * media/mediopt option with ifconfig. + * + **********************************************************************/ +static int +lem_media_change(struct ifnet *ifp) +{ + struct adapter *adapter = ifp->if_softc; + struct ifmedia *ifm = &adapter->media; + + INIT_DEBUGOUT("lem_media_change: begin"); + + if (IFM_TYPE(ifm->ifm_media) != IFM_ETHER) + return (EINVAL); + + EM_CORE_LOCK(adapter); + switch (IFM_SUBTYPE(ifm->ifm_media)) { + case IFM_AUTO: + adapter->hw.mac.autoneg = DO_AUTO_NEG; + adapter->hw.phy.autoneg_advertised = AUTONEG_ADV_DEFAULT; + break; + case IFM_1000_LX: + case IFM_1000_SX: + case IFM_1000_T: + adapter->hw.mac.autoneg = DO_AUTO_NEG; + adapter->hw.phy.autoneg_advertised = ADVERTISE_1000_FULL; + break; + case IFM_100_TX: + adapter->hw.mac.autoneg = FALSE; + adapter->hw.phy.autoneg_advertised = 0; + if ((ifm->ifm_media & IFM_GMASK) == IFM_FDX) + adapter->hw.mac.forced_speed_duplex = ADVERTISE_100_FULL; + else + adapter->hw.mac.forced_speed_duplex = ADVERTISE_100_HALF; + break; + case IFM_10_T: + adapter->hw.mac.autoneg = FALSE; + adapter->hw.phy.autoneg_advertised = 0; + if ((ifm->ifm_media & IFM_GMASK) == IFM_FDX) + adapter->hw.mac.forced_speed_duplex = ADVERTISE_10_FULL; + else + adapter->hw.mac.forced_speed_duplex = ADVERTISE_10_HALF; + break; + default: + device_printf(adapter->dev, "Unsupported media type\n"); + } + + /* As the speed/duplex settings my have changed we need to + * reset the PHY. + */ + adapter->hw.phy.reset_disable = FALSE; + + lem_init_locked(adapter); + EM_CORE_UNLOCK(adapter); + + return (0); +} + +/********************************************************************* + * + * This routine maps the mbufs to tx descriptors. + * + * return 0 on success, positive on failure + **********************************************************************/ + +static int +lem_xmit(struct adapter *adapter, struct mbuf **m_headp) +{ + bus_dma_segment_t segs[EM_MAX_SCATTER]; + bus_dmamap_t map; + struct em_buffer *tx_buffer, *tx_buffer_mapped; + struct e1000_tx_desc *ctxd = NULL; + struct mbuf *m_head; + u32 txd_upper, txd_lower, txd_used, txd_saved; + int error, nsegs, i, j, first, last = 0; + + m_head = *m_headp; + txd_upper = txd_lower = txd_used = txd_saved = 0; + + /* + ** When doing checksum offload, it is critical to + ** make sure the first mbuf has more than header, + ** because that routine expects data to be present. + */ + if ((m_head->m_pkthdr.csum_flags & CSUM_OFFLOAD) && + (m_head->m_len < ETHER_HDR_LEN + sizeof(struct ip))) { + m_head = m_pullup(m_head, ETHER_HDR_LEN + sizeof(struct ip)); + *m_headp = m_head; + if (m_head == NULL) + return (ENOBUFS); + } + + /* + * Map the packet for DMA + * + * Capture the first descriptor index, + * this descriptor will have the index + * of the EOP which is the only one that + * now gets a DONE bit writeback. + */ + first = adapter->next_avail_tx_desc; + tx_buffer = &adapter->tx_buffer_area[first]; + tx_buffer_mapped = tx_buffer; + map = tx_buffer->map; + + error = bus_dmamap_load_mbuf_sg(adapter->txtag, map, + *m_headp, segs, &nsegs, BUS_DMA_NOWAIT); + + /* + * There are two types of errors we can (try) to handle: + * - EFBIG means the mbuf chain was too long and bus_dma ran + * out of segments. Defragment the mbuf chain and try again. + * - ENOMEM means bus_dma could not obtain enough bounce buffers + * at this point in time. Defer sending and try again later. + * All other errors, in particular EINVAL, are fatal and prevent the + * mbuf chain from ever going through. Drop it and report error. + */ + if (error == EFBIG) { + struct mbuf *m; + + m = m_defrag(*m_headp, M_DONTWAIT); + if (m == NULL) { + adapter->mbuf_alloc_failed++; + m_freem(*m_headp); + *m_headp = NULL; + return (ENOBUFS); + } + *m_headp = m; + + /* Try it again */ + error = bus_dmamap_load_mbuf_sg(adapter->txtag, map, + *m_headp, segs, &nsegs, BUS_DMA_NOWAIT); + + if (error) { + adapter->no_tx_dma_setup++; + m_freem(*m_headp); + *m_headp = NULL; + return (error); + } + } else if (error != 0) { + adapter->no_tx_dma_setup++; + return (error); + } + + if (nsegs > (adapter->num_tx_desc_avail - 2)) { + adapter->no_tx_desc_avail2++; + bus_dmamap_unload(adapter->txtag, map); + return (ENOBUFS); + } + m_head = *m_headp; + + /* Do hardware assists */ + if (m_head->m_pkthdr.csum_flags & CSUM_OFFLOAD) + lem_transmit_checksum_setup(adapter, m_head, + &txd_upper, &txd_lower); + + i = adapter->next_avail_tx_desc; + if (adapter->pcix_82544) + txd_saved = i; + + /* Set up our transmit descriptors */ + for (j = 0; j < nsegs; j++) { + bus_size_t seg_len; + bus_addr_t seg_addr; + /* If adapter is 82544 and on PCIX bus */ + if(adapter->pcix_82544) { + DESC_ARRAY desc_array; + u32 array_elements, counter; + /* + * Check the Address and Length combination and + * split the data accordingly + */ + array_elements = lem_fill_descriptors(segs[j].ds_addr, + segs[j].ds_len, &desc_array); + for (counter = 0; counter < array_elements; counter++) { + if (txd_used == adapter->num_tx_desc_avail) { + adapter->next_avail_tx_desc = txd_saved; + adapter->no_tx_desc_avail2++; + bus_dmamap_unload(adapter->txtag, map); + return (ENOBUFS); + } + tx_buffer = &adapter->tx_buffer_area[i]; + ctxd = &adapter->tx_desc_base[i]; + ctxd->buffer_addr = htole64( + desc_array.descriptor[counter].address); + ctxd->lower.data = htole32( + (adapter->txd_cmd | txd_lower | (u16) + desc_array.descriptor[counter].length)); + ctxd->upper.data = + htole32((txd_upper)); + last = i; + if (++i == adapter->num_tx_desc) + i = 0; + tx_buffer->m_head = NULL; + tx_buffer->next_eop = -1; + txd_used++; + } + } else { + tx_buffer = &adapter->tx_buffer_area[i]; + ctxd = &adapter->tx_desc_base[i]; + seg_addr = segs[j].ds_addr; + seg_len = segs[j].ds_len; + ctxd->buffer_addr = htole64(seg_addr); + ctxd->lower.data = htole32( + adapter->txd_cmd | txd_lower | seg_len); + ctxd->upper.data = + htole32(txd_upper); + last = i; + if (++i == adapter->num_tx_desc) + i = 0; + tx_buffer->m_head = NULL; + tx_buffer->next_eop = -1; + } + } + + adapter->next_avail_tx_desc = i; + + if (adapter->pcix_82544) + adapter->num_tx_desc_avail -= txd_used; + else + adapter->num_tx_desc_avail -= nsegs; + + if (m_head->m_flags & M_VLANTAG) { + /* Set the vlan id. */ + ctxd->upper.fields.special = + htole16(m_head->m_pkthdr.ether_vtag); + /* Tell hardware to add tag */ + ctxd->lower.data |= htole32(E1000_TXD_CMD_VLE); + } + + tx_buffer->m_head = m_head; + tx_buffer_mapped->map = tx_buffer->map; + tx_buffer->map = map; + bus_dmamap_sync(adapter->txtag, map, BUS_DMASYNC_PREWRITE); + + /* + * Last Descriptor of Packet + * needs End Of Packet (EOP) + * and Report Status (RS) + */ + ctxd->lower.data |= + htole32(E1000_TXD_CMD_EOP | E1000_TXD_CMD_RS); + /* + * Keep track in the first buffer which + * descriptor will be written back + */ + tx_buffer = &adapter->tx_buffer_area[first]; + tx_buffer->next_eop = last; + adapter->watchdog_time = ticks; + + /* + * Advance the Transmit Descriptor Tail (TDT), this tells the E1000 + * that this frame is available to transmit. + */ + bus_dmamap_sync(adapter->txdma.dma_tag, adapter->txdma.dma_map, + BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); + if (adapter->hw.mac.type == e1000_82547 && + adapter->link_duplex == HALF_DUPLEX) + lem_82547_move_tail(adapter); + else { + E1000_WRITE_REG(&adapter->hw, E1000_TDT(0), i); + if (adapter->hw.mac.type == e1000_82547) + lem_82547_update_fifo_head(adapter, + m_head->m_pkthdr.len); + } + + return (0); +} + +/********************************************************************* + * + * 82547 workaround to avoid controller hang in half-duplex environment. + * The workaround is to avoid queuing a large packet that would span + * the internal Tx FIFO ring boundary. We need to reset the FIFO pointers + * in this case. We do that only when FIFO is quiescent. + * + **********************************************************************/ +static void +lem_82547_move_tail(void *arg) +{ + struct adapter *adapter = arg; + struct e1000_tx_desc *tx_desc; + u16 hw_tdt, sw_tdt, length = 0; + bool eop = 0; + + EM_TX_LOCK_ASSERT(adapter); + + hw_tdt = E1000_READ_REG(&adapter->hw, E1000_TDT(0)); + sw_tdt = adapter->next_avail_tx_desc; + + while (hw_tdt != sw_tdt) { + tx_desc = &adapter->tx_desc_base[hw_tdt]; + length += tx_desc->lower.flags.length; + eop = tx_desc->lower.data & E1000_TXD_CMD_EOP; + if (++hw_tdt == adapter->num_tx_desc) + hw_tdt = 0; + + if (eop) { + if (lem_82547_fifo_workaround(adapter, length)) { + adapter->tx_fifo_wrk_cnt++; + callout_reset(&adapter->tx_fifo_timer, 1, + lem_82547_move_tail, adapter); + break; + } + E1000_WRITE_REG(&adapter->hw, E1000_TDT(0), hw_tdt); + lem_82547_update_fifo_head(adapter, length); + length = 0; + } + } +} + +static int +lem_82547_fifo_workaround(struct adapter *adapter, int len) +{ + int fifo_space, fifo_pkt_len; + + fifo_pkt_len = roundup2(len + EM_FIFO_HDR, EM_FIFO_HDR); + + if (adapter->link_duplex == HALF_DUPLEX) { + fifo_space = adapter->tx_fifo_size - adapter->tx_fifo_head; + + if (fifo_pkt_len >= (EM_82547_PKT_THRESH + fifo_space)) { + if (lem_82547_tx_fifo_reset(adapter)) + return (0); + else + return (1); + } + } + + return (0); +} + +static void +lem_82547_update_fifo_head(struct adapter *adapter, int len) +{ + int fifo_pkt_len = roundup2(len + EM_FIFO_HDR, EM_FIFO_HDR); + + /* tx_fifo_head is always 16 byte aligned */ + adapter->tx_fifo_head += fifo_pkt_len; + if (adapter->tx_fifo_head >= adapter->tx_fifo_size) { + adapter->tx_fifo_head -= adapter->tx_fifo_size; + } +} + + +static int +lem_82547_tx_fifo_reset(struct adapter *adapter) +{ + u32 tctl; + + if ((E1000_READ_REG(&adapter->hw, E1000_TDT(0)) == + E1000_READ_REG(&adapter->hw, E1000_TDH(0))) && + (E1000_READ_REG(&adapter->hw, E1000_TDFT) == + E1000_READ_REG(&adapter->hw, E1000_TDFH)) && + (E1000_READ_REG(&adapter->hw, E1000_TDFTS) == + E1000_READ_REG(&adapter->hw, E1000_TDFHS)) && + (E1000_READ_REG(&adapter->hw, E1000_TDFPC) == 0)) { + /* Disable TX unit */ + tctl = E1000_READ_REG(&adapter->hw, E1000_TCTL); + E1000_WRITE_REG(&adapter->hw, E1000_TCTL, + tctl & ~E1000_TCTL_EN); + + /* Reset FIFO pointers */ + E1000_WRITE_REG(&adapter->hw, E1000_TDFT, + adapter->tx_head_addr); + E1000_WRITE_REG(&adapter->hw, E1000_TDFH, + adapter->tx_head_addr); + E1000_WRITE_REG(&adapter->hw, E1000_TDFTS, + adapter->tx_head_addr); + E1000_WRITE_REG(&adapter->hw, E1000_TDFHS, + adapter->tx_head_addr); + + /* Re-enable TX unit */ + E1000_WRITE_REG(&adapter->hw, E1000_TCTL, tctl); + E1000_WRITE_FLUSH(&adapter->hw); + + adapter->tx_fifo_head = 0; + adapter->tx_fifo_reset_cnt++; + + return (TRUE); + } + else { + return (FALSE); + } +} + +static void +lem_set_promisc(struct adapter *adapter) +{ + struct ifnet *ifp = adapter->ifp; + u32 reg_rctl; + + reg_rctl = E1000_READ_REG(&adapter->hw, E1000_RCTL); + + if (ifp->if_flags & IFF_PROMISC) { + reg_rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE); + /* Turn this on if you want to see bad packets */ + if (lem_debug_sbp) + reg_rctl |= E1000_RCTL_SBP; + E1000_WRITE_REG(&adapter->hw, E1000_RCTL, reg_rctl); + } else if (ifp->if_flags & IFF_ALLMULTI) { + reg_rctl |= E1000_RCTL_MPE; + reg_rctl &= ~E1000_RCTL_UPE; + E1000_WRITE_REG(&adapter->hw, E1000_RCTL, reg_rctl); + } +} + +static void +lem_disable_promisc(struct adapter *adapter) +{ + u32 reg_rctl; + + reg_rctl = E1000_READ_REG(&adapter->hw, E1000_RCTL); + + reg_rctl &= (~E1000_RCTL_UPE); + reg_rctl &= (~E1000_RCTL_MPE); + reg_rctl &= (~E1000_RCTL_SBP); + E1000_WRITE_REG(&adapter->hw, E1000_RCTL, reg_rctl); +} + + +/********************************************************************* + * Multicast Update + * + * This routine is called whenever multicast address list is updated. + * + **********************************************************************/ + +static void +lem_set_multi(struct adapter *adapter) +{ + struct ifnet *ifp = adapter->ifp; + struct ifmultiaddr *ifma; + u32 reg_rctl = 0; + u8 *mta; /* Multicast array memory */ + int mcnt = 0; + + IOCTL_DEBUGOUT("lem_set_multi: begin"); + + mta = adapter->mta; + bzero(mta, sizeof(u8) * ETH_ADDR_LEN * MAX_NUM_MULTICAST_ADDRESSES); + + if (adapter->hw.mac.type == e1000_82542 && + adapter->hw.revision_id == E1000_REVISION_2) { + reg_rctl = E1000_READ_REG(&adapter->hw, E1000_RCTL); + if (adapter->hw.bus.pci_cmd_word & CMD_MEM_WRT_INVALIDATE) + e1000_pci_clear_mwi(&adapter->hw); + reg_rctl |= E1000_RCTL_RST; + E1000_WRITE_REG(&adapter->hw, E1000_RCTL, reg_rctl); + msec_delay(5); + } + +#if __FreeBSD_version < 800000 + IF_ADDR_LOCK(ifp); +#else + if_maddr_rlock(ifp); +#endif + TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { + if (ifma->ifma_addr->sa_family != AF_LINK) + continue; + + if (mcnt == MAX_NUM_MULTICAST_ADDRESSES) + break; + + bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), + &mta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN); + mcnt++; + } +#if __FreeBSD_version < 800000 + IF_ADDR_UNLOCK(ifp); +#else + if_maddr_runlock(ifp); +#endif + if (mcnt >= MAX_NUM_MULTICAST_ADDRESSES) { + reg_rctl = E1000_READ_REG(&adapter->hw, E1000_RCTL); + reg_rctl |= E1000_RCTL_MPE; + E1000_WRITE_REG(&adapter->hw, E1000_RCTL, reg_rctl); + } else + e1000_update_mc_addr_list(&adapter->hw, mta, mcnt); + + if (adapter->hw.mac.type == e1000_82542 && + adapter->hw.revision_id == E1000_REVISION_2) { + reg_rctl = E1000_READ_REG(&adapter->hw, E1000_RCTL); + reg_rctl &= ~E1000_RCTL_RST; + E1000_WRITE_REG(&adapter->hw, E1000_RCTL, reg_rctl); + msec_delay(5); + if (adapter->hw.bus.pci_cmd_word & CMD_MEM_WRT_INVALIDATE) + e1000_pci_set_mwi(&adapter->hw); + } +} + + +/********************************************************************* + * Timer routine + * + * This routine checks for link status and updates statistics. + * + **********************************************************************/ + +static void +lem_local_timer(void *arg) +{ + struct adapter *adapter = arg; + + EM_CORE_LOCK_ASSERT(adapter); + + lem_update_link_status(adapter); + lem_update_stats_counters(adapter); + + lem_smartspeed(adapter); + + /* + * We check the watchdog: the time since + * the last TX descriptor was cleaned. + * This implies a functional TX engine. + */ + if ((adapter->watchdog_check == TRUE) && + (ticks - adapter->watchdog_time > EM_WATCHDOG)) + goto hung; + + callout_reset(&adapter->timer, hz, lem_local_timer, adapter); + return; +hung: + device_printf(adapter->dev, "Watchdog timeout -- resetting\n"); + adapter->ifp->if_drv_flags &= ~IFF_DRV_RUNNING; + adapter->watchdog_events++; + lem_init_locked(adapter); +} + +static void +lem_update_link_status(struct adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + struct ifnet *ifp = adapter->ifp; + device_t dev = adapter->dev; + u32 link_check = 0; + + /* Get the cached link value or read phy for real */ + switch (hw->phy.media_type) { + case e1000_media_type_copper: + if (hw->mac.get_link_status) { + /* Do the work to read phy */ + e1000_check_for_link(hw); + link_check = !hw->mac.get_link_status; + if (link_check) /* ESB2 fix */ + e1000_cfg_on_link_up(hw); + } else + link_check = TRUE; + break; + case e1000_media_type_fiber: + e1000_check_for_link(hw); + link_check = (E1000_READ_REG(hw, E1000_STATUS) & + E1000_STATUS_LU); + break; + case e1000_media_type_internal_serdes: + e1000_check_for_link(hw); + link_check = adapter->hw.mac.serdes_has_link; + break; + default: + case e1000_media_type_unknown: + break; + } + + /* Now check for a transition */ + if (link_check && (adapter->link_active == 0)) { + e1000_get_speed_and_duplex(hw, &adapter->link_speed, + &adapter->link_duplex); + if (bootverbose) + device_printf(dev, "Link is up %d Mbps %s\n", + adapter->link_speed, + ((adapter->link_duplex == FULL_DUPLEX) ? + "Full Duplex" : "Half Duplex")); + adapter->link_active = 1; + adapter->smartspeed = 0; + ifp->if_baudrate = adapter->link_speed * 1000000; + if_link_state_change(ifp, LINK_STATE_UP); + } else if (!link_check && (adapter->link_active == 1)) { + ifp->if_baudrate = adapter->link_speed = 0; + adapter->link_duplex = 0; + if (bootverbose) + device_printf(dev, "Link is Down\n"); + adapter->link_active = 0; + /* Link down, disable watchdog */ + adapter->watchdog_check = FALSE; + if_link_state_change(ifp, LINK_STATE_DOWN); + } +} + +/********************************************************************* + * + * This routine disables all traffic on the adapter by issuing a + * global reset on the MAC and deallocates TX/RX buffers. + * + * This routine should always be called with BOTH the CORE + * and TX locks. + **********************************************************************/ + +static void +lem_stop(void *arg) +{ + struct adapter *adapter = arg; + struct ifnet *ifp = adapter->ifp; + + EM_CORE_LOCK_ASSERT(adapter); + EM_TX_LOCK_ASSERT(adapter); + + INIT_DEBUGOUT("lem_stop: begin"); + + lem_disable_intr(adapter); + callout_stop(&adapter->timer); + callout_stop(&adapter->tx_fifo_timer); + + /* Tell the stack that the interface is no longer active */ + ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE); + + e1000_reset_hw(&adapter->hw); + if (adapter->hw.mac.type >= e1000_82544) + E1000_WRITE_REG(&adapter->hw, E1000_WUC, 0); + + e1000_led_off(&adapter->hw); + e1000_cleanup_led(&adapter->hw); +} + + +/********************************************************************* + * + * Determine hardware revision. + * + **********************************************************************/ +static void +lem_identify_hardware(struct adapter *adapter) +{ + device_t dev = adapter->dev; + + /* Make sure our PCI config space has the necessary stuff set */ + adapter->hw.bus.pci_cmd_word = pci_read_config(dev, PCIR_COMMAND, 2); + if (!((adapter->hw.bus.pci_cmd_word & PCIM_CMD_BUSMASTEREN) && + (adapter->hw.bus.pci_cmd_word & PCIM_CMD_MEMEN))) { + device_printf(dev, "Memory Access and/or Bus Master bits " + "were not set!\n"); + adapter->hw.bus.pci_cmd_word |= + (PCIM_CMD_BUSMASTEREN | PCIM_CMD_MEMEN); + pci_write_config(dev, PCIR_COMMAND, + adapter->hw.bus.pci_cmd_word, 2); + } + + /* Save off the information about this board */ + adapter->hw.vendor_id = pci_get_vendor(dev); + adapter->hw.device_id = pci_get_device(dev); + adapter->hw.revision_id = pci_read_config(dev, PCIR_REVID, 1); + adapter->hw.subsystem_vendor_id = + pci_read_config(dev, PCIR_SUBVEND_0, 2); + adapter->hw.subsystem_device_id = + pci_read_config(dev, PCIR_SUBDEV_0, 2); + + /* Do Shared Code Init and Setup */ + if (e1000_set_mac_type(&adapter->hw)) { + device_printf(dev, "Setup init failure\n"); + return; + } +} + +static int +lem_allocate_pci_resources(struct adapter *adapter) +{ + device_t dev = adapter->dev; + int val, rid, error = E1000_SUCCESS; + + rid = PCIR_BAR(0); + adapter->memory = bus_alloc_resource_any(dev, SYS_RES_MEMORY, + &rid, RF_ACTIVE); + if (adapter->memory == NULL) { + device_printf(dev, "Unable to allocate bus resource: memory\n"); + return (ENXIO); + } + adapter->osdep.mem_bus_space_tag = + rman_get_bustag(adapter->memory); + adapter->osdep.mem_bus_space_handle = + rman_get_bushandle(adapter->memory); + adapter->hw.hw_addr = (u8 *)&adapter->osdep.mem_bus_space_handle; + + /* Only older adapters use IO mapping */ + if (adapter->hw.mac.type > e1000_82543) { + /* Figure our where our IO BAR is ? */ + for (rid = PCIR_BAR(0); rid < PCIR_CIS;) { + val = pci_read_config(dev, rid, 4); + if (EM_BAR_TYPE(val) == EM_BAR_TYPE_IO) { + adapter->io_rid = rid; + break; + } + rid += 4; + /* check for 64bit BAR */ + if (EM_BAR_MEM_TYPE(val) == EM_BAR_MEM_TYPE_64BIT) + rid += 4; + } + if (rid >= PCIR_CIS) { + device_printf(dev, "Unable to locate IO BAR\n"); + return (ENXIO); + } + adapter->ioport = bus_alloc_resource_any(dev, + SYS_RES_IOPORT, &adapter->io_rid, RF_ACTIVE); + if (adapter->ioport == NULL) { + device_printf(dev, "Unable to allocate bus resource: " + "ioport\n"); + return (ENXIO); + } + adapter->hw.io_base = 0; + adapter->osdep.io_bus_space_tag = + rman_get_bustag(adapter->ioport); + adapter->osdep.io_bus_space_handle = + rman_get_bushandle(adapter->ioport); + } + + adapter->hw.back = &adapter->osdep; + + return (error); +} + +/********************************************************************* + * + * Setup the Legacy or MSI Interrupt handler + * + **********************************************************************/ +int +lem_allocate_irq(struct adapter *adapter) +{ + device_t dev = adapter->dev; + int error, rid = 0; + + /* Manually turn off all interrupts */ + E1000_WRITE_REG(&adapter->hw, E1000_IMC, 0xffffffff); + + /* We allocate a single interrupt resource */ + adapter->res[0] = bus_alloc_resource_any(dev, + SYS_RES_IRQ, &rid, RF_SHAREABLE | RF_ACTIVE); + if (adapter->res[0] == NULL) { + device_printf(dev, "Unable to allocate bus resource: " + "interrupt\n"); + return (ENXIO); + } + +#ifdef EM_LEGACY_IRQ + /* We do Legacy setup */ + if ((error = bus_setup_intr(dev, adapter->res[0], + INTR_TYPE_NET | INTR_MPSAFE, NULL, lem_intr, adapter, + &adapter->tag[0])) != 0) { + device_printf(dev, "Failed to register interrupt handler"); + return (error); + } + +#else /* FAST_IRQ */ + /* + * Try allocating a fast interrupt and the associated deferred + * processing contexts. + */ + TASK_INIT(&adapter->rxtx_task, 0, lem_handle_rxtx, adapter); + TASK_INIT(&adapter->link_task, 0, lem_handle_link, adapter); + adapter->tq = taskqueue_create_fast("lem_taskq", M_NOWAIT, + taskqueue_thread_enqueue, &adapter->tq); + taskqueue_start_threads(&adapter->tq, 1, PI_NET, "%s taskq", + device_get_nameunit(adapter->dev)); + if ((error = bus_setup_intr(dev, adapter->res[0], + INTR_TYPE_NET, lem_irq_fast, NULL, adapter, + &adapter->tag[0])) != 0) { + device_printf(dev, "Failed to register fast interrupt " + "handler: %d\n", error); + taskqueue_free(adapter->tq); + adapter->tq = NULL; + return (error); + } +#endif /* EM_LEGACY_IRQ */ + + return (0); +} + + +static void +lem_free_pci_resources(struct adapter *adapter) +{ + device_t dev = adapter->dev; + + + if (adapter->tag[0] != NULL) { + bus_teardown_intr(dev, adapter->res[0], + adapter->tag[0]); + adapter->tag[0] = NULL; + } + + if (adapter->res[0] != NULL) { + bus_release_resource(dev, SYS_RES_IRQ, + 0, adapter->res[0]); + } + + if (adapter->memory != NULL) + bus_release_resource(dev, SYS_RES_MEMORY, + PCIR_BAR(0), adapter->memory); + + if (adapter->ioport != NULL) + bus_release_resource(dev, SYS_RES_IOPORT, + adapter->io_rid, adapter->ioport); +} + + +/********************************************************************* + * + * Initialize the hardware to a configuration + * as specified by the adapter structure. + * + **********************************************************************/ +static int +lem_hardware_init(struct adapter *adapter) +{ + device_t dev = adapter->dev; + u16 rx_buffer_size; + + INIT_DEBUGOUT("lem_hardware_init: begin"); + + /* Issue a global reset */ + e1000_reset_hw(&adapter->hw); + + /* When hardware is reset, fifo_head is also reset */ + adapter->tx_fifo_head = 0; + + /* + * These parameters control the automatic generation (Tx) and + * response (Rx) to Ethernet PAUSE frames. + * - High water mark should allow for at least two frames to be + * received after sending an XOFF. + * - Low water mark works best when it is very near the high water mark. + * This allows the receiver to restart by sending XON when it has + * drained a bit. Here we use an arbitary value of 1500 which will + * restart after one full frame is pulled from the buffer. There + * could be several smaller frames in the buffer and if so they will + * not trigger the XON until their total number reduces the buffer + * by 1500. + * - The pause time is fairly large at 1000 x 512ns = 512 usec. + */ + rx_buffer_size = ((E1000_READ_REG(&adapter->hw, E1000_PBA) & + 0xffff) << 10 ); + + adapter->hw.fc.high_water = rx_buffer_size - + roundup2(adapter->max_frame_size, 1024); + adapter->hw.fc.low_water = adapter->hw.fc.high_water - 1500; + + adapter->hw.fc.pause_time = EM_FC_PAUSE_TIME; + adapter->hw.fc.send_xon = TRUE; + + /* Set Flow control, use the tunable location if sane */ + if ((lem_fc_setting >= 0) && (lem_fc_setting < 4)) + adapter->hw.fc.requested_mode = lem_fc_setting; + else + adapter->hw.fc.requested_mode = e1000_fc_none; + + if (e1000_init_hw(&adapter->hw) < 0) { + device_printf(dev, "Hardware Initialization Failed\n"); + return (EIO); + } + + e1000_check_for_link(&adapter->hw); + + return (0); +} + +/********************************************************************* + * + * Setup networking device structure and register an interface. + * + **********************************************************************/ +static int +lem_setup_interface(device_t dev, struct adapter *adapter) +{ + struct ifnet *ifp; + + INIT_DEBUGOUT("lem_setup_interface: begin"); + + ifp = adapter->ifp = if_alloc(IFT_ETHER); + if (ifp == NULL) { + device_printf(dev, "can not allocate ifnet structure\n"); + return (-1); + } + if_initname(ifp, device_get_name(dev), device_get_unit(dev)); + ifp->if_mtu = ETHERMTU; + ifp->if_init = lem_init; + ifp->if_softc = adapter; + ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST; + ifp->if_ioctl = lem_ioctl; + ifp->if_start = lem_start; + IFQ_SET_MAXLEN(&ifp->if_snd, adapter->num_tx_desc - 1); + ifp->if_snd.ifq_drv_maxlen = adapter->num_tx_desc - 1; + IFQ_SET_READY(&ifp->if_snd); + + ether_ifattach(ifp, adapter->hw.mac.addr); + + ifp->if_capabilities = ifp->if_capenable = 0; + + if (adapter->hw.mac.type >= e1000_82543) { + ifp->if_capabilities |= IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM; + ifp->if_capenable |= IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM; + } + + /* + * Tell the upper layer(s) we support long frames. + */ + ifp->if_data.ifi_hdrlen = sizeof(struct ether_vlan_header); + ifp->if_capabilities |= IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU; + ifp->if_capenable |= IFCAP_VLAN_HWTAGGING | IFCAP_VLAN_MTU; + + /* + ** Dont turn this on by default, if vlans are + ** created on another pseudo device (eg. lagg) + ** then vlan events are not passed thru, breaking + ** operation, but with HW FILTER off it works. If + ** using vlans directly on the em driver you can + ** enable this and get full hardware tag filtering. + */ + ifp->if_capabilities |= IFCAP_VLAN_HWFILTER; + +#ifdef DEVICE_POLLING + ifp->if_capabilities |= IFCAP_POLLING; +#endif + + /* Enable only WOL MAGIC by default */ + if (adapter->wol) { + ifp->if_capabilities |= IFCAP_WOL; + ifp->if_capenable |= IFCAP_WOL_MAGIC; + } + + /* + * Specify the media types supported by this adapter and register + * callbacks to update media and link information + */ + ifmedia_init(&adapter->media, IFM_IMASK, + lem_media_change, lem_media_status); + if ((adapter->hw.phy.media_type == e1000_media_type_fiber) || + (adapter->hw.phy.media_type == e1000_media_type_internal_serdes)) { + u_char fiber_type = IFM_1000_SX; /* default type */ + + if (adapter->hw.mac.type == e1000_82545) + fiber_type = IFM_1000_LX; + ifmedia_add(&adapter->media, IFM_ETHER | fiber_type | IFM_FDX, + 0, NULL); + ifmedia_add(&adapter->media, IFM_ETHER | fiber_type, 0, NULL); + } else { + ifmedia_add(&adapter->media, IFM_ETHER | IFM_10_T, 0, NULL); + ifmedia_add(&adapter->media, IFM_ETHER | IFM_10_T | IFM_FDX, + 0, NULL); + ifmedia_add(&adapter->media, IFM_ETHER | IFM_100_TX, + 0, NULL); + ifmedia_add(&adapter->media, IFM_ETHER | IFM_100_TX | IFM_FDX, + 0, NULL); + if (adapter->hw.phy.type != e1000_phy_ife) { + ifmedia_add(&adapter->media, + IFM_ETHER | IFM_1000_T | IFM_FDX, 0, NULL); + ifmedia_add(&adapter->media, + IFM_ETHER | IFM_1000_T, 0, NULL); + } + } + ifmedia_add(&adapter->media, IFM_ETHER | IFM_AUTO, 0, NULL); + ifmedia_set(&adapter->media, IFM_ETHER | IFM_AUTO); + return (0); +} + + +/********************************************************************* + * + * Workaround for SmartSpeed on 82541 and 82547 controllers + * + **********************************************************************/ +static void +lem_smartspeed(struct adapter *adapter) +{ + u16 phy_tmp; + + if (adapter->link_active || (adapter->hw.phy.type != e1000_phy_igp) || + adapter->hw.mac.autoneg == 0 || + (adapter->hw.phy.autoneg_advertised & ADVERTISE_1000_FULL) == 0) + return; + + if (adapter->smartspeed == 0) { + /* If Master/Slave config fault is asserted twice, + * we assume back-to-back */ + e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_tmp); + if (!(phy_tmp & SR_1000T_MS_CONFIG_FAULT)) + return; + e1000_read_phy_reg(&adapter->hw, PHY_1000T_STATUS, &phy_tmp); + if (phy_tmp & SR_1000T_MS_CONFIG_FAULT) { + e1000_read_phy_reg(&adapter->hw, + PHY_1000T_CTRL, &phy_tmp); + if(phy_tmp & CR_1000T_MS_ENABLE) { + phy_tmp &= ~CR_1000T_MS_ENABLE; + e1000_write_phy_reg(&adapter->hw, + PHY_1000T_CTRL, phy_tmp); + adapter->smartspeed++; + if(adapter->hw.mac.autoneg && + !e1000_copper_link_autoneg(&adapter->hw) && + !e1000_read_phy_reg(&adapter->hw, + PHY_CONTROL, &phy_tmp)) { + phy_tmp |= (MII_CR_AUTO_NEG_EN | + MII_CR_RESTART_AUTO_NEG); + e1000_write_phy_reg(&adapter->hw, + PHY_CONTROL, phy_tmp); + } + } + } + return; + } else if(adapter->smartspeed == EM_SMARTSPEED_DOWNSHIFT) { + /* If still no link, perhaps using 2/3 pair cable */ + e1000_read_phy_reg(&adapter->hw, PHY_1000T_CTRL, &phy_tmp); + phy_tmp |= CR_1000T_MS_ENABLE; + e1000_write_phy_reg(&adapter->hw, PHY_1000T_CTRL, phy_tmp); + if(adapter->hw.mac.autoneg && + !e1000_copper_link_autoneg(&adapter->hw) && + !e1000_read_phy_reg(&adapter->hw, PHY_CONTROL, &phy_tmp)) { + phy_tmp |= (MII_CR_AUTO_NEG_EN | + MII_CR_RESTART_AUTO_NEG); + e1000_write_phy_reg(&adapter->hw, PHY_CONTROL, phy_tmp); + } + } + /* Restart process after EM_SMARTSPEED_MAX iterations */ + if(adapter->smartspeed++ == EM_SMARTSPEED_MAX) + adapter->smartspeed = 0; +} + + +/* + * Manage DMA'able memory. + */ +static void +lem_dmamap_cb(void *arg, bus_dma_segment_t *segs, int nseg, int error) +{ + if (error) + return; + *(bus_addr_t *) arg = segs[0].ds_addr; +} + +static int +lem_dma_malloc(struct adapter *adapter, bus_size_t size, + struct em_dma_alloc *dma, int mapflags) +{ + int error; + + error = bus_dma_tag_create(bus_get_dma_tag(adapter->dev), /* parent */ + EM_DBA_ALIGN, 0, /* alignment, bounds */ + BUS_SPACE_MAXADDR, /* lowaddr */ + BUS_SPACE_MAXADDR, /* highaddr */ + NULL, NULL, /* filter, filterarg */ + size, /* maxsize */ + 1, /* nsegments */ + size, /* maxsegsize */ + 0, /* flags */ + NULL, /* lockfunc */ + NULL, /* lockarg */ + &dma->dma_tag); + if (error) { + device_printf(adapter->dev, + "%s: bus_dma_tag_create failed: %d\n", + __func__, error); + goto fail_0; + } + + error = bus_dmamem_alloc(dma->dma_tag, (void**) &dma->dma_vaddr, + BUS_DMA_NOWAIT | BUS_DMA_COHERENT, &dma->dma_map); + if (error) { + device_printf(adapter->dev, + "%s: bus_dmamem_alloc(%ju) failed: %d\n", + __func__, (uintmax_t)size, error); + goto fail_2; + } + + dma->dma_paddr = 0; + error = bus_dmamap_load(dma->dma_tag, dma->dma_map, dma->dma_vaddr, + size, lem_dmamap_cb, &dma->dma_paddr, mapflags | BUS_DMA_NOWAIT); + if (error || dma->dma_paddr == 0) { + device_printf(adapter->dev, + "%s: bus_dmamap_load failed: %d\n", + __func__, error); + goto fail_3; + } + + return (0); + +fail_3: + bus_dmamap_unload(dma->dma_tag, dma->dma_map); +fail_2: + bus_dmamem_free(dma->dma_tag, dma->dma_vaddr, dma->dma_map); + bus_dma_tag_destroy(dma->dma_tag); +fail_0: + dma->dma_map = NULL; + dma->dma_tag = NULL; + + return (error); +} + +static void +lem_dma_free(struct adapter *adapter, struct em_dma_alloc *dma) +{ + if (dma->dma_tag == NULL) + return; + if (dma->dma_map != NULL) { + bus_dmamap_sync(dma->dma_tag, dma->dma_map, + BUS_DMASYNC_POSTREAD | BUS_DMASYNC_POSTWRITE); + bus_dmamap_unload(dma->dma_tag, dma->dma_map); + bus_dmamem_free(dma->dma_tag, dma->dma_vaddr, dma->dma_map); + dma->dma_map = NULL; + } + bus_dma_tag_destroy(dma->dma_tag); + dma->dma_tag = NULL; +} + + +/********************************************************************* + * + * Allocate memory for tx_buffer structures. The tx_buffer stores all + * the information needed to transmit a packet on the wire. + * + **********************************************************************/ +static int +lem_allocate_transmit_structures(struct adapter *adapter) +{ + device_t dev = adapter->dev; + struct em_buffer *tx_buffer; + int error; + + /* + * Create DMA tags for tx descriptors + */ + if ((error = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ + 1, 0, /* alignment, bounds */ + BUS_SPACE_MAXADDR, /* lowaddr */ + BUS_SPACE_MAXADDR, /* highaddr */ + NULL, NULL, /* filter, filterarg */ + MCLBYTES * EM_MAX_SCATTER, /* maxsize */ + EM_MAX_SCATTER, /* nsegments */ + MCLBYTES, /* maxsegsize */ + 0, /* flags */ + NULL, /* lockfunc */ + NULL, /* lockarg */ + &adapter->txtag)) != 0) { + device_printf(dev, "Unable to allocate TX DMA tag\n"); + goto fail; + } + + adapter->tx_buffer_area = malloc(sizeof(struct em_buffer) * + adapter->num_tx_desc, M_DEVBUF, M_NOWAIT | M_ZERO); + if (adapter->tx_buffer_area == NULL) { + device_printf(dev, "Unable to allocate tx_buffer memory\n"); + error = ENOMEM; + goto fail; + } + + /* Create the descriptor buffer dma maps */ + for (int i = 0; i < adapter->num_tx_desc; i++) { + tx_buffer = &adapter->tx_buffer_area[i]; + error = bus_dmamap_create(adapter->txtag, 0, &tx_buffer->map); + if (error != 0) { + device_printf(dev, "Unable to create TX DMA map\n"); + goto fail; + } + tx_buffer->next_eop = -1; + } + + return (0); +fail: + lem_free_transmit_structures(adapter); + return (error); +} + +/********************************************************************* + * + * (Re)Initialize transmit structures. + * + **********************************************************************/ +static void +lem_setup_transmit_structures(struct adapter *adapter) +{ + struct em_buffer *tx_buffer; + + /* Clear the old ring contents */ + bzero(adapter->tx_desc_base, + (sizeof(struct e1000_tx_desc)) * adapter->num_tx_desc); + + /* Free any existing TX buffers */ + for (int i = 0; i < adapter->num_tx_desc; i++, tx_buffer++) { + tx_buffer = &adapter->tx_buffer_area[i]; + bus_dmamap_sync(adapter->txtag, tx_buffer->map, + BUS_DMASYNC_POSTWRITE); + bus_dmamap_unload(adapter->txtag, tx_buffer->map); + m_freem(tx_buffer->m_head); + tx_buffer->m_head = NULL; + tx_buffer->next_eop = -1; + } + + /* Reset state */ + adapter->next_avail_tx_desc = 0; + adapter->next_tx_to_clean = 0; + adapter->num_tx_desc_avail = adapter->num_tx_desc; + + bus_dmamap_sync(adapter->txdma.dma_tag, adapter->txdma.dma_map, + BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); + + return; +} + +/********************************************************************* + * + * Enable transmit unit. + * + **********************************************************************/ +static void +lem_initialize_transmit_unit(struct adapter *adapter) +{ + u32 tctl, tipg = 0; + u64 bus_addr; + + INIT_DEBUGOUT("lem_initialize_transmit_unit: begin"); + /* Setup the Base and Length of the Tx Descriptor Ring */ + bus_addr = adapter->txdma.dma_paddr; + E1000_WRITE_REG(&adapter->hw, E1000_TDLEN(0), + adapter->num_tx_desc * sizeof(struct e1000_tx_desc)); + E1000_WRITE_REG(&adapter->hw, E1000_TDBAH(0), + (u32)(bus_addr >> 32)); + E1000_WRITE_REG(&adapter->hw, E1000_TDBAL(0), + (u32)bus_addr); + /* Setup the HW Tx Head and Tail descriptor pointers */ + E1000_WRITE_REG(&adapter->hw, E1000_TDT(0), 0); + E1000_WRITE_REG(&adapter->hw, E1000_TDH(0), 0); + + HW_DEBUGOUT2("Base = %x, Length = %x\n", + E1000_READ_REG(&adapter->hw, E1000_TDBAL(0)), + E1000_READ_REG(&adapter->hw, E1000_TDLEN(0))); + + /* Set the default values for the Tx Inter Packet Gap timer */ + switch (adapter->hw.mac.type) { + case e1000_82542: + tipg = DEFAULT_82542_TIPG_IPGT; + tipg |= DEFAULT_82542_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT; + tipg |= DEFAULT_82542_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT; + break; + default: + if ((adapter->hw.phy.media_type == e1000_media_type_fiber) || + (adapter->hw.phy.media_type == + e1000_media_type_internal_serdes)) + tipg = DEFAULT_82543_TIPG_IPGT_FIBER; + else + tipg = DEFAULT_82543_TIPG_IPGT_COPPER; + tipg |= DEFAULT_82543_TIPG_IPGR1 << E1000_TIPG_IPGR1_SHIFT; + tipg |= DEFAULT_82543_TIPG_IPGR2 << E1000_TIPG_IPGR2_SHIFT; + } + + E1000_WRITE_REG(&adapter->hw, E1000_TIPG, tipg); + E1000_WRITE_REG(&adapter->hw, E1000_TIDV, adapter->tx_int_delay.value); + if(adapter->hw.mac.type >= e1000_82540) + E1000_WRITE_REG(&adapter->hw, E1000_TADV, + adapter->tx_abs_int_delay.value); + + /* Program the Transmit Control Register */ + tctl = E1000_READ_REG(&adapter->hw, E1000_TCTL); + tctl &= ~E1000_TCTL_CT; + tctl |= (E1000_TCTL_PSP | E1000_TCTL_RTLC | E1000_TCTL_EN | + (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT)); + + /* This write will effectively turn on the transmit unit. */ + E1000_WRITE_REG(&adapter->hw, E1000_TCTL, tctl); + + /* Setup Transmit Descriptor Base Settings */ + adapter->txd_cmd = E1000_TXD_CMD_IFCS; + + if (adapter->tx_int_delay.value > 0) + adapter->txd_cmd |= E1000_TXD_CMD_IDE; +} + +/********************************************************************* + * + * Free all transmit related data structures. + * + **********************************************************************/ +static void +lem_free_transmit_structures(struct adapter *adapter) +{ + struct em_buffer *tx_buffer; + + INIT_DEBUGOUT("free_transmit_structures: begin"); + + if (adapter->tx_buffer_area != NULL) { + for (int i = 0; i < adapter->num_tx_desc; i++) { + tx_buffer = &adapter->tx_buffer_area[i]; + if (tx_buffer->m_head != NULL) { + bus_dmamap_sync(adapter->txtag, tx_buffer->map, + BUS_DMASYNC_POSTWRITE); + bus_dmamap_unload(adapter->txtag, + tx_buffer->map); + m_freem(tx_buffer->m_head); + tx_buffer->m_head = NULL; + } else if (tx_buffer->map != NULL) + bus_dmamap_unload(adapter->txtag, + tx_buffer->map); + if (tx_buffer->map != NULL) { + bus_dmamap_destroy(adapter->txtag, + tx_buffer->map); + tx_buffer->map = NULL; + } + } + } + if (adapter->tx_buffer_area != NULL) { + free(adapter->tx_buffer_area, M_DEVBUF); + adapter->tx_buffer_area = NULL; + } + if (adapter->txtag != NULL) { + bus_dma_tag_destroy(adapter->txtag); + adapter->txtag = NULL; + } +#if __FreeBSD_version >= 800000 + if (adapter->br != NULL) + buf_ring_free(adapter->br, M_DEVBUF); +#endif +} + +/********************************************************************* + * + * The offload context needs to be set when we transfer the first + * packet of a particular protocol (TCP/UDP). This routine has been + * enhanced to deal with inserted VLAN headers, and IPV6 (not complete) + * + * Added back the old method of keeping the current context type + * and not setting if unnecessary, as this is reported to be a + * big performance win. -jfv + **********************************************************************/ +static void +lem_transmit_checksum_setup(struct adapter *adapter, struct mbuf *mp, + u32 *txd_upper, u32 *txd_lower) +{ + struct e1000_context_desc *TXD = NULL; + struct em_buffer *tx_buffer; + struct ether_vlan_header *eh; + struct ip *ip = NULL; + struct ip6_hdr *ip6; + int curr_txd, ehdrlen; + u32 cmd, hdr_len, ip_hlen; + u16 etype; + u8 ipproto; + + + cmd = hdr_len = ipproto = 0; + *txd_upper = *txd_lower = 0; + curr_txd = adapter->next_avail_tx_desc; + + /* + * Determine where frame payload starts. + * Jump over vlan headers if already present, + * helpful for QinQ too. + */ + eh = mtod(mp, struct ether_vlan_header *); + if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) { + etype = ntohs(eh->evl_proto); + ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN; + } else { + etype = ntohs(eh->evl_encap_proto); + ehdrlen = ETHER_HDR_LEN; + } + + /* + * We only support TCP/UDP for IPv4 and IPv6 for the moment. + * TODO: Support SCTP too when it hits the tree. + */ + switch (etype) { + case ETHERTYPE_IP: + ip = (struct ip *)(mp->m_data + ehdrlen); + ip_hlen = ip->ip_hl << 2; + + /* Setup of IP header checksum. */ + if (mp->m_pkthdr.csum_flags & CSUM_IP) { + /* + * Start offset for header checksum calculation. + * End offset for header checksum calculation. + * Offset of place to put the checksum. + */ + TXD = (struct e1000_context_desc *) + &adapter->tx_desc_base[curr_txd]; + TXD->lower_setup.ip_fields.ipcss = ehdrlen; + TXD->lower_setup.ip_fields.ipcse = + htole16(ehdrlen + ip_hlen); + TXD->lower_setup.ip_fields.ipcso = + ehdrlen + offsetof(struct ip, ip_sum); + cmd |= E1000_TXD_CMD_IP; + *txd_upper |= E1000_TXD_POPTS_IXSM << 8; + } + + hdr_len = ehdrlen + ip_hlen; + ipproto = ip->ip_p; + + break; + case ETHERTYPE_IPV6: + ip6 = (struct ip6_hdr *)(mp->m_data + ehdrlen); + ip_hlen = sizeof(struct ip6_hdr); /* XXX: No header stacking. */ + + /* IPv6 doesn't have a header checksum. */ + + hdr_len = ehdrlen + ip_hlen; + ipproto = ip6->ip6_nxt; + break; + + default: + return; + } + + switch (ipproto) { + case IPPROTO_TCP: + if (mp->m_pkthdr.csum_flags & CSUM_TCP) { + *txd_lower = E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; + *txd_upper |= E1000_TXD_POPTS_TXSM << 8; + /* no need for context if already set */ + if (adapter->last_hw_offload == CSUM_TCP) + return; + adapter->last_hw_offload = CSUM_TCP; + /* + * Start offset for payload checksum calculation. + * End offset for payload checksum calculation. + * Offset of place to put the checksum. + */ + TXD = (struct e1000_context_desc *) + &adapter->tx_desc_base[curr_txd]; + TXD->upper_setup.tcp_fields.tucss = hdr_len; + TXD->upper_setup.tcp_fields.tucse = htole16(0); + TXD->upper_setup.tcp_fields.tucso = + hdr_len + offsetof(struct tcphdr, th_sum); + cmd |= E1000_TXD_CMD_TCP; + } + break; + case IPPROTO_UDP: + { + if (mp->m_pkthdr.csum_flags & CSUM_UDP) { + *txd_lower = E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D; + *txd_upper |= E1000_TXD_POPTS_TXSM << 8; + /* no need for context if already set */ + if (adapter->last_hw_offload == CSUM_UDP) + return; + adapter->last_hw_offload = CSUM_UDP; + /* + * Start offset for header checksum calculation. + * End offset for header checksum calculation. + * Offset of place to put the checksum. + */ + TXD = (struct e1000_context_desc *) + &adapter->tx_desc_base[curr_txd]; + TXD->upper_setup.tcp_fields.tucss = hdr_len; + TXD->upper_setup.tcp_fields.tucse = htole16(0); + TXD->upper_setup.tcp_fields.tucso = + hdr_len + offsetof(struct udphdr, uh_sum); + } + /* Fall Thru */ + } + default: + break; + } + + if (TXD == NULL) + return; + TXD->tcp_seg_setup.data = htole32(0); + TXD->cmd_and_length = + htole32(adapter->txd_cmd | E1000_TXD_CMD_DEXT | cmd); + tx_buffer = &adapter->tx_buffer_area[curr_txd]; + tx_buffer->m_head = NULL; + tx_buffer->next_eop = -1; + + if (++curr_txd == adapter->num_tx_desc) + curr_txd = 0; + + adapter->num_tx_desc_avail--; + adapter->next_avail_tx_desc = curr_txd; +} + + +/********************************************************************** + * + * Examine each tx_buffer in the used queue. If the hardware is done + * processing the packet then free associated resources. The + * tx_buffer is put back on the free queue. + * + **********************************************************************/ +static void +lem_txeof(struct adapter *adapter) +{ + int first, last, done, num_avail; + struct em_buffer *tx_buffer; + struct e1000_tx_desc *tx_desc, *eop_desc; + struct ifnet *ifp = adapter->ifp; + + EM_TX_LOCK_ASSERT(adapter); + + if (adapter->num_tx_desc_avail == adapter->num_tx_desc) + return; + + num_avail = adapter->num_tx_desc_avail; + first = adapter->next_tx_to_clean; + tx_desc = &adapter->tx_desc_base[first]; + tx_buffer = &adapter->tx_buffer_area[first]; + last = tx_buffer->next_eop; + eop_desc = &adapter->tx_desc_base[last]; + + /* + * What this does is get the index of the + * first descriptor AFTER the EOP of the + * first packet, that way we can do the + * simple comparison on the inner while loop. + */ + if (++last == adapter->num_tx_desc) + last = 0; + done = last; + + bus_dmamap_sync(adapter->txdma.dma_tag, adapter->txdma.dma_map, + BUS_DMASYNC_POSTREAD); + + while (eop_desc->upper.fields.status & E1000_TXD_STAT_DD) { + /* We clean the range of the packet */ + while (first != done) { + tx_desc->upper.data = 0; + tx_desc->lower.data = 0; + tx_desc->buffer_addr = 0; + ++num_avail; + + if (tx_buffer->m_head) { + ifp->if_opackets++; + bus_dmamap_sync(adapter->txtag, + tx_buffer->map, + BUS_DMASYNC_POSTWRITE); + bus_dmamap_unload(adapter->txtag, + tx_buffer->map); + + m_freem(tx_buffer->m_head); + tx_buffer->m_head = NULL; + } + tx_buffer->next_eop = -1; + adapter->watchdog_time = ticks; + + if (++first == adapter->num_tx_desc) + first = 0; + + tx_buffer = &adapter->tx_buffer_area[first]; + tx_desc = &adapter->tx_desc_base[first]; + } + /* See if we can continue to the next packet */ + last = tx_buffer->next_eop; + if (last != -1) { + eop_desc = &adapter->tx_desc_base[last]; + /* Get new done point */ + if (++last == adapter->num_tx_desc) last = 0; + done = last; + } else + break; + } + bus_dmamap_sync(adapter->txdma.dma_tag, adapter->txdma.dma_map, + BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); + + adapter->next_tx_to_clean = first; + adapter->num_tx_desc_avail = num_avail; + + /* + * If we have enough room, clear IFF_DRV_OACTIVE to + * tell the stack that it is OK to send packets. + * If there are no pending descriptors, clear the watchdog. + */ + if (adapter->num_tx_desc_avail > EM_TX_CLEANUP_THRESHOLD) { + ifp->if_drv_flags &= ~IFF_DRV_OACTIVE; + if (adapter->num_tx_desc_avail == adapter->num_tx_desc) { + adapter->watchdog_check = FALSE; + return; + } + } +} + +/********************************************************************* + * + * When Link is lost sometimes there is work still in the TX ring + * which may result in a watchdog, rather than allow that we do an + * attempted cleanup and then reinit here. Note that this has been + * seens mostly with fiber adapters. + * + **********************************************************************/ +static void +lem_tx_purge(struct adapter *adapter) +{ + if ((!adapter->link_active) && (adapter->watchdog_check)) { + EM_TX_LOCK(adapter); + lem_txeof(adapter); + EM_TX_UNLOCK(adapter); + if (adapter->watchdog_check) /* Still outstanding? */ + lem_init_locked(adapter); + } +} + +/********************************************************************* + * + * Get a buffer from system mbuf buffer pool. + * + **********************************************************************/ +static int +lem_get_buf(struct adapter *adapter, int i) +{ + struct mbuf *m; + bus_dma_segment_t segs[1]; + bus_dmamap_t map; + struct em_buffer *rx_buffer; + int error, nsegs; + + m = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR); + if (m == NULL) { + adapter->mbuf_cluster_failed++; + return (ENOBUFS); + } + m->m_len = m->m_pkthdr.len = MCLBYTES; + + if (adapter->max_frame_size <= (MCLBYTES - ETHER_ALIGN)) + m_adj(m, ETHER_ALIGN); + + /* + * Using memory from the mbuf cluster pool, invoke the + * bus_dma machinery to arrange the memory mapping. + */ + error = bus_dmamap_load_mbuf_sg(adapter->rxtag, + adapter->rx_sparemap, m, segs, &nsegs, BUS_DMA_NOWAIT); + if (error != 0) { + m_free(m); + return (error); + } + + /* If nsegs is wrong then the stack is corrupt. */ + KASSERT(nsegs == 1, ("Too many segments returned!")); + + rx_buffer = &adapter->rx_buffer_area[i]; + if (rx_buffer->m_head != NULL) + bus_dmamap_unload(adapter->rxtag, rx_buffer->map); + + map = rx_buffer->map; + rx_buffer->map = adapter->rx_sparemap; + adapter->rx_sparemap = map; + bus_dmamap_sync(adapter->rxtag, rx_buffer->map, BUS_DMASYNC_PREREAD); + rx_buffer->m_head = m; + + adapter->rx_desc_base[i].buffer_addr = htole64(segs[0].ds_addr); + return (0); +} + +/********************************************************************* + * + * Allocate memory for rx_buffer structures. Since we use one + * rx_buffer per received packet, the maximum number of rx_buffer's + * that we'll need is equal to the number of receive descriptors + * that we've allocated. + * + **********************************************************************/ +static int +lem_allocate_receive_structures(struct adapter *adapter) +{ + device_t dev = adapter->dev; + struct em_buffer *rx_buffer; + int i, error; + + adapter->rx_buffer_area = malloc(sizeof(struct em_buffer) * + adapter->num_rx_desc, M_DEVBUF, M_NOWAIT | M_ZERO); + if (adapter->rx_buffer_area == NULL) { + device_printf(dev, "Unable to allocate rx_buffer memory\n"); + return (ENOMEM); + } + + error = bus_dma_tag_create(bus_get_dma_tag(dev), /* parent */ + 1, 0, /* alignment, bounds */ + BUS_SPACE_MAXADDR, /* lowaddr */ + BUS_SPACE_MAXADDR, /* highaddr */ + NULL, NULL, /* filter, filterarg */ + MCLBYTES, /* maxsize */ + 1, /* nsegments */ + MCLBYTES, /* maxsegsize */ + 0, /* flags */ + NULL, /* lockfunc */ + NULL, /* lockarg */ + &adapter->rxtag); + if (error) { + device_printf(dev, "%s: bus_dma_tag_create failed %d\n", + __func__, error); + goto fail; + } + + /* Create the spare map (used by getbuf) */ + error = bus_dmamap_create(adapter->rxtag, BUS_DMA_NOWAIT, + &adapter->rx_sparemap); + if (error) { + device_printf(dev, "%s: bus_dmamap_create failed: %d\n", + __func__, error); + goto fail; + } + + rx_buffer = adapter->rx_buffer_area; + for (i = 0; i < adapter->num_rx_desc; i++, rx_buffer++) { + error = bus_dmamap_create(adapter->rxtag, BUS_DMA_NOWAIT, + &rx_buffer->map); + if (error) { + device_printf(dev, "%s: bus_dmamap_create failed: %d\n", + __func__, error); + goto fail; + } + } + + return (0); + +fail: + lem_free_receive_structures(adapter); + return (error); +} + +/********************************************************************* + * + * (Re)initialize receive structures. + * + **********************************************************************/ +static int +lem_setup_receive_structures(struct adapter *adapter) +{ + struct em_buffer *rx_buffer; + int i, error; + + /* Reset descriptor ring */ + bzero(adapter->rx_desc_base, + (sizeof(struct e1000_rx_desc)) * adapter->num_rx_desc); + + /* Free current RX buffers. */ + rx_buffer = adapter->rx_buffer_area; + for (i = 0; i < adapter->num_rx_desc; i++, rx_buffer++) { + if (rx_buffer->m_head != NULL) { + bus_dmamap_sync(adapter->rxtag, rx_buffer->map, + BUS_DMASYNC_POSTREAD); + bus_dmamap_unload(adapter->rxtag, rx_buffer->map); + m_freem(rx_buffer->m_head); + rx_buffer->m_head = NULL; + } + } + + /* Allocate new ones. */ + for (i = 0; i < adapter->num_rx_desc; i++) { + error = lem_get_buf(adapter, i); + if (error) + return (error); + } + + /* Setup our descriptor pointers */ + adapter->next_rx_desc_to_check = 0; + bus_dmamap_sync(adapter->rxdma.dma_tag, adapter->rxdma.dma_map, + BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); + + return (0); +} + +/********************************************************************* + * + * Enable receive unit. + * + **********************************************************************/ +#define MAX_INTS_PER_SEC 8000 +#define DEFAULT_ITR 1000000000/(MAX_INTS_PER_SEC * 256) + +static void +lem_initialize_receive_unit(struct adapter *adapter) +{ + struct ifnet *ifp = adapter->ifp; + u64 bus_addr; + u32 rctl, rxcsum; + + INIT_DEBUGOUT("lem_initialize_receive_unit: begin"); + + /* + * Make sure receives are disabled while setting + * up the descriptor ring + */ + rctl = E1000_READ_REG(&adapter->hw, E1000_RCTL); + E1000_WRITE_REG(&adapter->hw, E1000_RCTL, rctl & ~E1000_RCTL_EN); + + if (adapter->hw.mac.type >= e1000_82540) { + E1000_WRITE_REG(&adapter->hw, E1000_RADV, + adapter->rx_abs_int_delay.value); + /* + * Set the interrupt throttling rate. Value is calculated + * as DEFAULT_ITR = 1/(MAX_INTS_PER_SEC * 256ns) + */ + E1000_WRITE_REG(&adapter->hw, E1000_ITR, DEFAULT_ITR); + } + + /* + ** When using MSIX interrupts we need to throttle + ** using the EITR register (82574 only) + */ + if (adapter->msix) + for (int i = 0; i < 4; i++) + E1000_WRITE_REG(&adapter->hw, + E1000_EITR_82574(i), DEFAULT_ITR); + + /* Disable accelerated ackknowledge */ + if (adapter->hw.mac.type == e1000_82574) + E1000_WRITE_REG(&adapter->hw, + E1000_RFCTL, E1000_RFCTL_ACK_DIS); + + /* Setup the Base and Length of the Rx Descriptor Ring */ + bus_addr = adapter->rxdma.dma_paddr; + E1000_WRITE_REG(&adapter->hw, E1000_RDLEN(0), + adapter->num_rx_desc * sizeof(struct e1000_rx_desc)); + E1000_WRITE_REG(&adapter->hw, E1000_RDBAH(0), + (u32)(bus_addr >> 32)); + E1000_WRITE_REG(&adapter->hw, E1000_RDBAL(0), + (u32)bus_addr); + + /* Setup the Receive Control Register */ + rctl &= ~(3 << E1000_RCTL_MO_SHIFT); + rctl |= E1000_RCTL_EN | E1000_RCTL_BAM | E1000_RCTL_LBM_NO | + E1000_RCTL_RDMTS_HALF | + (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT); + + /* Make sure VLAN Filters are off */ + rctl &= ~E1000_RCTL_VFE; + + if (e1000_tbi_sbp_enabled_82543(&adapter->hw)) + rctl |= E1000_RCTL_SBP; + else + rctl &= ~E1000_RCTL_SBP; + + switch (adapter->rx_buffer_len) { + default: + case 2048: + rctl |= E1000_RCTL_SZ_2048; + break; + case 4096: + rctl |= E1000_RCTL_SZ_4096 | + E1000_RCTL_BSEX | E1000_RCTL_LPE; + break; + case 8192: + rctl |= E1000_RCTL_SZ_8192 | + E1000_RCTL_BSEX | E1000_RCTL_LPE; + break; + case 16384: + rctl |= E1000_RCTL_SZ_16384 | + E1000_RCTL_BSEX | E1000_RCTL_LPE; + break; + } + + if (ifp->if_mtu > ETHERMTU) + rctl |= E1000_RCTL_LPE; + else + rctl &= ~E1000_RCTL_LPE; + + /* Enable 82543 Receive Checksum Offload for TCP and UDP */ + if ((adapter->hw.mac.type >= e1000_82543) && + (ifp->if_capenable & IFCAP_RXCSUM)) { + rxcsum = E1000_READ_REG(&adapter->hw, E1000_RXCSUM); + rxcsum |= (E1000_RXCSUM_IPOFL | E1000_RXCSUM_TUOFL); + E1000_WRITE_REG(&adapter->hw, E1000_RXCSUM, rxcsum); + } + + /* Enable Receives */ + E1000_WRITE_REG(&adapter->hw, E1000_RCTL, rctl); + + /* + * Setup the HW Rx Head and + * Tail Descriptor Pointers + */ + E1000_WRITE_REG(&adapter->hw, E1000_RDH(0), 0); + E1000_WRITE_REG(&adapter->hw, E1000_RDT(0), adapter->num_rx_desc - 1); + + return; +} + +/********************************************************************* + * + * Free receive related data structures. + * + **********************************************************************/ +static void +lem_free_receive_structures(struct adapter *adapter) +{ + struct em_buffer *rx_buffer; + int i; + + INIT_DEBUGOUT("free_receive_structures: begin"); + + if (adapter->rx_sparemap) { + bus_dmamap_destroy(adapter->rxtag, adapter->rx_sparemap); + adapter->rx_sparemap = NULL; + } + + /* Cleanup any existing buffers */ + if (adapter->rx_buffer_area != NULL) { + rx_buffer = adapter->rx_buffer_area; + for (i = 0; i < adapter->num_rx_desc; i++, rx_buffer++) { + if (rx_buffer->m_head != NULL) { + bus_dmamap_sync(adapter->rxtag, rx_buffer->map, + BUS_DMASYNC_POSTREAD); + bus_dmamap_unload(adapter->rxtag, + rx_buffer->map); + m_freem(rx_buffer->m_head); + rx_buffer->m_head = NULL; + } else if (rx_buffer->map != NULL) + bus_dmamap_unload(adapter->rxtag, + rx_buffer->map); + if (rx_buffer->map != NULL) { + bus_dmamap_destroy(adapter->rxtag, + rx_buffer->map); + rx_buffer->map = NULL; + } + } + } + + if (adapter->rx_buffer_area != NULL) { + free(adapter->rx_buffer_area, M_DEVBUF); + adapter->rx_buffer_area = NULL; + } + + if (adapter->rxtag != NULL) { + bus_dma_tag_destroy(adapter->rxtag); + adapter->rxtag = NULL; + } +} + +/********************************************************************* + * + * This routine executes in interrupt context. It replenishes + * the mbufs in the descriptor and sends data which has been + * dma'ed into host memory to upper layer. + * + * We loop at most count times if count is > 0, or until done if + * count < 0. + * + * For polling we also now return the number of cleaned packets + *********************************************************************/ +static bool +lem_rxeof(struct adapter *adapter, int count, int *done) +{ + struct ifnet *ifp = adapter->ifp;; + struct mbuf *mp; + u8 status = 0, accept_frame = 0, eop = 0; + u16 len, desc_len, prev_len_adj; + int i, rx_sent = 0; + struct e1000_rx_desc *current_desc; + + EM_RX_LOCK(adapter); + i = adapter->next_rx_desc_to_check; + current_desc = &adapter->rx_desc_base[i]; + bus_dmamap_sync(adapter->rxdma.dma_tag, adapter->rxdma.dma_map, + BUS_DMASYNC_POSTREAD); + + if (!((current_desc->status) & E1000_RXD_STAT_DD)) { + if (done != NULL) + *done = rx_sent; + EM_RX_UNLOCK(adapter); + return (FALSE); + } + + while (count != 0 && ifp->if_drv_flags & IFF_DRV_RUNNING) { + struct mbuf *m = NULL; + + status = current_desc->status; + if ((status & E1000_RXD_STAT_DD) == 0) + break; + + mp = adapter->rx_buffer_area[i].m_head; + /* + * Can't defer bus_dmamap_sync(9) because TBI_ACCEPT + * needs to access the last received byte in the mbuf. + */ + bus_dmamap_sync(adapter->rxtag, adapter->rx_buffer_area[i].map, + BUS_DMASYNC_POSTREAD); + + accept_frame = 1; + prev_len_adj = 0; + desc_len = le16toh(current_desc->length); + if (status & E1000_RXD_STAT_EOP) { + count--; + eop = 1; + if (desc_len < ETHER_CRC_LEN) { + len = 0; + prev_len_adj = ETHER_CRC_LEN - desc_len; + } else + len = desc_len - ETHER_CRC_LEN; + } else { + eop = 0; + len = desc_len; + } + + if (current_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK) { + u8 last_byte; + u32 pkt_len = desc_len; + + if (adapter->fmp != NULL) + pkt_len += adapter->fmp->m_pkthdr.len; + + last_byte = *(mtod(mp, caddr_t) + desc_len - 1); + if (TBI_ACCEPT(&adapter->hw, status, + current_desc->errors, pkt_len, last_byte, + adapter->min_frame_size, adapter->max_frame_size)) { + e1000_tbi_adjust_stats_82543(&adapter->hw, + &adapter->stats, pkt_len, + adapter->hw.mac.addr, + adapter->max_frame_size); + if (len > 0) + len--; + } else + accept_frame = 0; + } + + if (accept_frame) { + if (lem_get_buf(adapter, i) != 0) { + ifp->if_iqdrops++; + goto discard; + } + + /* Assign correct length to the current fragment */ + mp->m_len = len; + + if (adapter->fmp == NULL) { + mp->m_pkthdr.len = len; + adapter->fmp = mp; /* Store the first mbuf */ + adapter->lmp = mp; + } else { + /* Chain mbuf's together */ + mp->m_flags &= ~M_PKTHDR; + /* + * Adjust length of previous mbuf in chain if + * we received less than 4 bytes in the last + * descriptor. + */ + if (prev_len_adj > 0) { + adapter->lmp->m_len -= prev_len_adj; + adapter->fmp->m_pkthdr.len -= + prev_len_adj; + } + adapter->lmp->m_next = mp; + adapter->lmp = adapter->lmp->m_next; + adapter->fmp->m_pkthdr.len += len; + } + + if (eop) { + adapter->fmp->m_pkthdr.rcvif = ifp; + ifp->if_ipackets++; + lem_receive_checksum(adapter, current_desc, + adapter->fmp); +#ifndef __NO_STRICT_ALIGNMENT + if (adapter->max_frame_size > + (MCLBYTES - ETHER_ALIGN) && + lem_fixup_rx(adapter) != 0) + goto skip; +#endif + if (status & E1000_RXD_STAT_VP) { + adapter->fmp->m_pkthdr.ether_vtag = + (le16toh(current_desc->special) & + E1000_RXD_SPC_VLAN_MASK); + adapter->fmp->m_flags |= M_VLANTAG; + } +#ifndef __NO_STRICT_ALIGNMENT +skip: +#endif + m = adapter->fmp; + adapter->fmp = NULL; + adapter->lmp = NULL; + } + } else { + ifp->if_ierrors++; +discard: + /* Reuse loaded DMA map and just update mbuf chain */ + mp = adapter->rx_buffer_area[i].m_head; + mp->m_len = mp->m_pkthdr.len = MCLBYTES; + mp->m_data = mp->m_ext.ext_buf; + mp->m_next = NULL; + if (adapter->max_frame_size <= + (MCLBYTES - ETHER_ALIGN)) + m_adj(mp, ETHER_ALIGN); + if (adapter->fmp != NULL) { + m_freem(adapter->fmp); + adapter->fmp = NULL; + adapter->lmp = NULL; + } + m = NULL; + } + + /* Zero out the receive descriptors status. */ + current_desc->status = 0; + bus_dmamap_sync(adapter->rxdma.dma_tag, adapter->rxdma.dma_map, + BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE); + + /* Advance our pointers to the next descriptor. */ + if (++i == adapter->num_rx_desc) + i = 0; + /* Call into the stack */ + if (m != NULL) { + adapter->next_rx_desc_to_check = i; + EM_RX_UNLOCK(adapter); + (*ifp->if_input)(ifp, m); + EM_RX_LOCK(adapter); + rx_sent++; + i = adapter->next_rx_desc_to_check; + } + current_desc = &adapter->rx_desc_base[i]; + } + adapter->next_rx_desc_to_check = i; + + /* Advance the E1000's Receive Queue #0 "Tail Pointer". */ + if (--i < 0) + i = adapter->num_rx_desc - 1; + E1000_WRITE_REG(&adapter->hw, E1000_RDT(0), i); + if (done != NULL) + *done = rx_sent; + EM_RX_UNLOCK(adapter); + return ((status & E1000_RXD_STAT_DD) ? TRUE : FALSE); +} + +#ifndef __NO_STRICT_ALIGNMENT +/* + * When jumbo frames are enabled we should realign entire payload on + * architecures with strict alignment. This is serious design mistake of 8254x + * as it nullifies DMA operations. 8254x just allows RX buffer size to be + * 2048/4096/8192/16384. What we really want is 2048 - ETHER_ALIGN to align its + * payload. On architecures without strict alignment restrictions 8254x still + * performs unaligned memory access which would reduce the performance too. + * To avoid copying over an entire frame to align, we allocate a new mbuf and + * copy ethernet header to the new mbuf. The new mbuf is prepended into the + * existing mbuf chain. + * + * Be aware, best performance of the 8254x is achived only when jumbo frame is + * not used at all on architectures with strict alignment. + */ +static int +lem_fixup_rx(struct adapter *adapter) +{ + struct mbuf *m, *n; + int error; + + error = 0; + m = adapter->fmp; + if (m->m_len <= (MCLBYTES - ETHER_HDR_LEN)) { + bcopy(m->m_data, m->m_data + ETHER_HDR_LEN, m->m_len); + m->m_data += ETHER_HDR_LEN; + } else { + MGETHDR(n, M_DONTWAIT, MT_DATA); + if (n != NULL) { + bcopy(m->m_data, n->m_data, ETHER_HDR_LEN); + m->m_data += ETHER_HDR_LEN; + m->m_len -= ETHER_HDR_LEN; + n->m_len = ETHER_HDR_LEN; + M_MOVE_PKTHDR(n, m); + n->m_next = m; + adapter->fmp = n; + } else { + adapter->dropped_pkts++; + m_freem(adapter->fmp); + adapter->fmp = NULL; + error = ENOMEM; + } + } + + return (error); +} +#endif + +/********************************************************************* + * + * Verify that the hardware indicated that the checksum is valid. + * Inform the stack about the status of checksum so that stack + * doesn't spend time verifying the checksum. + * + *********************************************************************/ +static void +lem_receive_checksum(struct adapter *adapter, + struct e1000_rx_desc *rx_desc, struct mbuf *mp) +{ + /* 82543 or newer only */ + if ((adapter->hw.mac.type < e1000_82543) || + /* Ignore Checksum bit is set */ + (rx_desc->status & E1000_RXD_STAT_IXSM)) { + mp->m_pkthdr.csum_flags = 0; + return; + } + + if (rx_desc->status & E1000_RXD_STAT_IPCS) { + /* Did it pass? */ + if (!(rx_desc->errors & E1000_RXD_ERR_IPE)) { + /* IP Checksum Good */ + mp->m_pkthdr.csum_flags = CSUM_IP_CHECKED; + mp->m_pkthdr.csum_flags |= CSUM_IP_VALID; + + } else { + mp->m_pkthdr.csum_flags = 0; + } + } + + if (rx_desc->status & E1000_RXD_STAT_TCPCS) { + /* Did it pass? */ + if (!(rx_desc->errors & E1000_RXD_ERR_TCPE)) { + mp->m_pkthdr.csum_flags |= + (CSUM_DATA_VALID | CSUM_PSEUDO_HDR); + mp->m_pkthdr.csum_data = htons(0xffff); + } + } +} + +/* + * This routine is run via an vlan + * config EVENT + */ +static void +lem_register_vlan(void *arg, struct ifnet *ifp, u16 vtag) +{ + struct adapter *adapter = ifp->if_softc; + u32 index, bit; + + if (ifp->if_softc != arg) /* Not our event */ + return; + + if ((vtag == 0) || (vtag > 4095)) /* Invalid ID */ + return; + + EM_CORE_LOCK(adapter); + index = (vtag >> 5) & 0x7F; + bit = vtag & 0x1F; + adapter->shadow_vfta[index] |= (1 << bit); + ++adapter->num_vlans; + /* Re-init to load the changes */ + if (ifp->if_capenable & IFCAP_VLAN_HWFILTER) + lem_init_locked(adapter); + EM_CORE_UNLOCK(adapter); +} + +/* + * This routine is run via an vlan + * unconfig EVENT + */ +static void +lem_unregister_vlan(void *arg, struct ifnet *ifp, u16 vtag) +{ + struct adapter *adapter = ifp->if_softc; + u32 index, bit; + + if (ifp->if_softc != arg) + return; + + if ((vtag == 0) || (vtag > 4095)) /* Invalid */ + return; + + EM_CORE_LOCK(adapter); + index = (vtag >> 5) & 0x7F; + bit = vtag & 0x1F; + adapter->shadow_vfta[index] &= ~(1 << bit); + --adapter->num_vlans; + /* Re-init to load the changes */ + if (ifp->if_capenable & IFCAP_VLAN_HWFILTER) + lem_init_locked(adapter); + EM_CORE_UNLOCK(adapter); +} + +static void +lem_setup_vlan_hw_support(struct adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + u32 reg; + + /* + ** We get here thru init_locked, meaning + ** a soft reset, this has already cleared + ** the VFTA and other state, so if there + ** have been no vlan's registered do nothing. + */ + if (adapter->num_vlans == 0) + return; + + /* + ** A soft reset zero's out the VFTA, so + ** we need to repopulate it now. + */ + for (int i = 0; i < EM_VFTA_SIZE; i++) + if (adapter->shadow_vfta[i] != 0) + E1000_WRITE_REG_ARRAY(hw, E1000_VFTA, + i, adapter->shadow_vfta[i]); + + reg = E1000_READ_REG(hw, E1000_CTRL); + reg |= E1000_CTRL_VME; + E1000_WRITE_REG(hw, E1000_CTRL, reg); + + /* Enable the Filter Table */ + reg = E1000_READ_REG(hw, E1000_RCTL); + reg &= ~E1000_RCTL_CFIEN; + reg |= E1000_RCTL_VFE; + E1000_WRITE_REG(hw, E1000_RCTL, reg); + + /* Update the frame size */ + E1000_WRITE_REG(&adapter->hw, E1000_RLPML, + adapter->max_frame_size + VLAN_TAG_SIZE); +} + +static void +lem_enable_intr(struct adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + u32 ims_mask = IMS_ENABLE_MASK; + + if (adapter->msix) { + E1000_WRITE_REG(hw, EM_EIAC, EM_MSIX_MASK); + ims_mask |= EM_MSIX_MASK; + } + E1000_WRITE_REG(hw, E1000_IMS, ims_mask); +} + +static void +lem_disable_intr(struct adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + + if (adapter->msix) + E1000_WRITE_REG(hw, EM_EIAC, 0); + E1000_WRITE_REG(&adapter->hw, E1000_IMC, 0xffffffff); +} + +/* + * Bit of a misnomer, what this really means is + * to enable OS management of the system... aka + * to disable special hardware management features + */ +static void +lem_init_manageability(struct adapter *adapter) +{ + /* A shared code workaround */ + if (adapter->has_manage) { + int manc = E1000_READ_REG(&adapter->hw, E1000_MANC); + /* disable hardware interception of ARP */ + manc &= ~(E1000_MANC_ARP_EN); + E1000_WRITE_REG(&adapter->hw, E1000_MANC, manc); + } +} + +/* + * Give control back to hardware management + * controller if there is one. + */ +static void +lem_release_manageability(struct adapter *adapter) +{ + if (adapter->has_manage) { + int manc = E1000_READ_REG(&adapter->hw, E1000_MANC); + + /* re-enable hardware interception of ARP */ + manc |= E1000_MANC_ARP_EN; + E1000_WRITE_REG(&adapter->hw, E1000_MANC, manc); + } +} + +/* + * lem_get_hw_control sets the {CTRL_EXT|FWSM}:DRV_LOAD bit. + * For ASF and Pass Through versions of f/w this means + * that the driver is loaded. For AMT version type f/w + * this means that the network i/f is open. + */ +static void +lem_get_hw_control(struct adapter *adapter) +{ + u32 ctrl_ext; + + ctrl_ext = E1000_READ_REG(&adapter->hw, E1000_CTRL_EXT); + E1000_WRITE_REG(&adapter->hw, E1000_CTRL_EXT, + ctrl_ext | E1000_CTRL_EXT_DRV_LOAD); + return; +} + +/* + * lem_release_hw_control resets {CTRL_EXT|FWSM}:DRV_LOAD bit. + * For ASF and Pass Through versions of f/w this means that + * the driver is no longer loaded. For AMT versions of the + * f/w this means that the network i/f is closed. + */ +static void +lem_release_hw_control(struct adapter *adapter) +{ + u32 ctrl_ext; + + if (!adapter->has_manage) + return; + + ctrl_ext = E1000_READ_REG(&adapter->hw, E1000_CTRL_EXT); + E1000_WRITE_REG(&adapter->hw, E1000_CTRL_EXT, + ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD); + return; +} + +static int +lem_is_valid_ether_addr(u8 *addr) +{ + char zero_addr[6] = { 0, 0, 0, 0, 0, 0 }; + + if ((addr[0] & 1) || (!bcmp(addr, zero_addr, ETHER_ADDR_LEN))) { + return (FALSE); + } + + return (TRUE); +} + +/* +** Parse the interface capabilities with regard +** to both system management and wake-on-lan for +** later use. +*/ +static void +lem_get_wakeup(device_t dev) +{ + struct adapter *adapter = device_get_softc(dev); + u16 eeprom_data = 0, device_id, apme_mask; + + adapter->has_manage = e1000_enable_mng_pass_thru(&adapter->hw); + apme_mask = EM_EEPROM_APME; + + switch (adapter->hw.mac.type) { + case e1000_82542: + case e1000_82543: + break; + case e1000_82544: + e1000_read_nvm(&adapter->hw, + NVM_INIT_CONTROL2_REG, 1, &eeprom_data); + apme_mask = EM_82544_APME; + break; + case e1000_82546: + case e1000_82546_rev_3: + if (adapter->hw.bus.func == 1) { + e1000_read_nvm(&adapter->hw, + NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data); + break; + } else + e1000_read_nvm(&adapter->hw, + NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data); + break; + default: + e1000_read_nvm(&adapter->hw, + NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data); + break; + } + if (eeprom_data & apme_mask) + adapter->wol = (E1000_WUFC_MAG | E1000_WUFC_MC); + /* + * We have the eeprom settings, now apply the special cases + * where the eeprom may be wrong or the board won't support + * wake on lan on a particular port + */ + device_id = pci_get_device(dev); + switch (device_id) { + case E1000_DEV_ID_82546GB_PCIE: + adapter->wol = 0; + break; + case E1000_DEV_ID_82546EB_FIBER: + case E1000_DEV_ID_82546GB_FIBER: + /* Wake events only supported on port A for dual fiber + * regardless of eeprom setting */ + if (E1000_READ_REG(&adapter->hw, E1000_STATUS) & + E1000_STATUS_FUNC_1) + adapter->wol = 0; + break; + case E1000_DEV_ID_82546GB_QUAD_COPPER_KSP3: + /* if quad port adapter, disable WoL on all but port A */ + if (global_quad_port_a != 0) + adapter->wol = 0; + /* Reset for multiple quad port adapters */ + if (++global_quad_port_a == 4) + global_quad_port_a = 0; + break; + } + return; +} + + +/* + * Enable PCI Wake On Lan capability + */ +static void +lem_enable_wakeup(device_t dev) +{ + struct adapter *adapter = device_get_softc(dev); + struct ifnet *ifp = adapter->ifp; + u32 pmc, ctrl, ctrl_ext, rctl; + u16 status; + + if ((pci_find_extcap(dev, PCIY_PMG, &pmc) != 0)) + return; + + /* Advertise the wakeup capability */ + ctrl = E1000_READ_REG(&adapter->hw, E1000_CTRL); + ctrl |= (E1000_CTRL_SWDPIN2 | E1000_CTRL_SWDPIN3); + E1000_WRITE_REG(&adapter->hw, E1000_CTRL, ctrl); + E1000_WRITE_REG(&adapter->hw, E1000_WUC, E1000_WUC_PME_EN); + + /* Keep the laser running on Fiber adapters */ + if (adapter->hw.phy.media_type == e1000_media_type_fiber || + adapter->hw.phy.media_type == e1000_media_type_internal_serdes) { + ctrl_ext = E1000_READ_REG(&adapter->hw, E1000_CTRL_EXT); + ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA; + E1000_WRITE_REG(&adapter->hw, E1000_CTRL_EXT, ctrl_ext); + } + + /* + ** Determine type of Wakeup: note that wol + ** is set with all bits on by default. + */ + if ((ifp->if_capenable & IFCAP_WOL_MAGIC) == 0) + adapter->wol &= ~E1000_WUFC_MAG; + + if ((ifp->if_capenable & IFCAP_WOL_MCAST) == 0) + adapter->wol &= ~E1000_WUFC_MC; + else { + rctl = E1000_READ_REG(&adapter->hw, E1000_RCTL); + rctl |= E1000_RCTL_MPE; + E1000_WRITE_REG(&adapter->hw, E1000_RCTL, rctl); + } + + if (adapter->hw.mac.type == e1000_pchlan) { + if (lem_enable_phy_wakeup(adapter)) + return; + } else { + E1000_WRITE_REG(&adapter->hw, E1000_WUC, E1000_WUC_PME_EN); + E1000_WRITE_REG(&adapter->hw, E1000_WUFC, adapter->wol); + } + + + /* Request PME */ + status = pci_read_config(dev, pmc + PCIR_POWER_STATUS, 2); + status &= ~(PCIM_PSTAT_PME | PCIM_PSTAT_PMEENABLE); + if (ifp->if_capenable & IFCAP_WOL) + status |= PCIM_PSTAT_PME | PCIM_PSTAT_PMEENABLE; + pci_write_config(dev, pmc + PCIR_POWER_STATUS, status, 2); + + return; +} + +/* +** WOL in the newer chipset interfaces (pchlan) +** require thing to be copied into the phy +*/ +static int +lem_enable_phy_wakeup(struct adapter *adapter) +{ + struct e1000_hw *hw = &adapter->hw; + u32 mreg, ret = 0; + u16 preg; + + /* copy MAC RARs to PHY RARs */ + for (int i = 0; i < adapter->hw.mac.rar_entry_count; i++) { + mreg = E1000_READ_REG(hw, E1000_RAL(i)); + e1000_write_phy_reg(hw, BM_RAR_L(i), (u16)(mreg & 0xFFFF)); + e1000_write_phy_reg(hw, BM_RAR_M(i), + (u16)((mreg >> 16) & 0xFFFF)); + mreg = E1000_READ_REG(hw, E1000_RAH(i)); + e1000_write_phy_reg(hw, BM_RAR_H(i), (u16)(mreg & 0xFFFF)); + e1000_write_phy_reg(hw, BM_RAR_CTRL(i), + (u16)((mreg >> 16) & 0xFFFF)); + } + + /* copy MAC MTA to PHY MTA */ + for (int i = 0; i < adapter->hw.mac.mta_reg_count; i++) { + mreg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i); + e1000_write_phy_reg(hw, BM_MTA(i), (u16)(mreg & 0xFFFF)); + e1000_write_phy_reg(hw, BM_MTA(i) + 1, + (u16)((mreg >> 16) & 0xFFFF)); + } + + /* configure PHY Rx Control register */ + e1000_read_phy_reg(&adapter->hw, BM_RCTL, &preg); + mreg = E1000_READ_REG(hw, E1000_RCTL); + if (mreg & E1000_RCTL_UPE) + preg |= BM_RCTL_UPE; + if (mreg & E1000_RCTL_MPE) + preg |= BM_RCTL_MPE; + preg &= ~(BM_RCTL_MO_MASK); + if (mreg & E1000_RCTL_MO_3) + preg |= (((mreg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT) + << BM_RCTL_MO_SHIFT); + if (mreg & E1000_RCTL_BAM) + preg |= BM_RCTL_BAM; + if (mreg & E1000_RCTL_PMCF) + preg |= BM_RCTL_PMCF; + mreg = E1000_READ_REG(hw, E1000_CTRL); + if (mreg & E1000_CTRL_RFCE) + preg |= BM_RCTL_RFCE; + e1000_write_phy_reg(&adapter->hw, BM_RCTL, preg); + + /* enable PHY wakeup in MAC register */ + E1000_WRITE_REG(hw, E1000_WUC, + E1000_WUC_PHY_WAKE | E1000_WUC_PME_EN); + E1000_WRITE_REG(hw, E1000_WUFC, adapter->wol); + + /* configure and enable PHY wakeup in PHY registers */ + e1000_write_phy_reg(&adapter->hw, BM_WUFC, adapter->wol); + e1000_write_phy_reg(&adapter->hw, BM_WUC, E1000_WUC_PME_EN); + + /* activate PHY wakeup */ + ret = hw->phy.ops.acquire(hw); + if (ret) { + printf("Could not acquire PHY\n"); + return ret; + } + e1000_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT, + (BM_WUC_ENABLE_PAGE << IGP_PAGE_SHIFT)); + ret = e1000_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, &preg); + if (ret) { + printf("Could not read PHY page 769\n"); + goto out; + } + preg |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT; + ret = e1000_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, preg); + if (ret) + printf("Could not set PHY Host Wakeup bit\n"); +out: + hw->phy.ops.release(hw); + + return ret; +} + +static void +lem_led_func(void *arg, int onoff) +{ + struct adapter *adapter = arg; + + EM_CORE_LOCK(adapter); + if (onoff) { + e1000_setup_led(&adapter->hw); + e1000_led_on(&adapter->hw); + } else { + e1000_led_off(&adapter->hw); + e1000_cleanup_led(&adapter->hw); + } + EM_CORE_UNLOCK(adapter); +} + +/********************************************************************* +* 82544 Coexistence issue workaround. +* There are 2 issues. +* 1. Transmit Hang issue. +* To detect this issue, following equation can be used... +* SIZE[3:0] + ADDR[2:0] = SUM[3:0]. +* If SUM[3:0] is in between 1 to 4, we will have this issue. +* +* 2. DAC issue. +* To detect this issue, following equation can be used... +* SIZE[3:0] + ADDR[2:0] = SUM[3:0]. +* If SUM[3:0] is in between 9 to c, we will have this issue. +* +* +* WORKAROUND: +* Make sure we do not have ending address +* as 1,2,3,4(Hang) or 9,a,b,c (DAC) +* +*************************************************************************/ +static u32 +lem_fill_descriptors (bus_addr_t address, u32 length, + PDESC_ARRAY desc_array) +{ + u32 safe_terminator; + + /* Since issue is sensitive to length and address.*/ + /* Let us first check the address...*/ + if (length <= 4) { + desc_array->descriptor[0].address = address; + desc_array->descriptor[0].length = length; + desc_array->elements = 1; + return (desc_array->elements); + } + safe_terminator = (u32)((((u32)address & 0x7) + + (length & 0xF)) & 0xF); + /* if it does not fall between 0x1 to 0x4 and 0x9 to 0xC then return */ + if (safe_terminator == 0 || + (safe_terminator > 4 && + safe_terminator < 9) || + (safe_terminator > 0xC && + safe_terminator <= 0xF)) { + desc_array->descriptor[0].address = address; + desc_array->descriptor[0].length = length; + desc_array->elements = 1; + return (desc_array->elements); + } + + desc_array->descriptor[0].address = address; + desc_array->descriptor[0].length = length - 4; + desc_array->descriptor[1].address = address + (length - 4); + desc_array->descriptor[1].length = 4; + desc_array->elements = 2; + return (desc_array->elements); +} + +/********************************************************************** + * + * Update the board statistics counters. + * + **********************************************************************/ +static void +lem_update_stats_counters(struct adapter *adapter) +{ + struct ifnet *ifp; + + if(adapter->hw.phy.media_type == e1000_media_type_copper || + (E1000_READ_REG(&adapter->hw, E1000_STATUS) & E1000_STATUS_LU)) { + adapter->stats.symerrs += E1000_READ_REG(&adapter->hw, E1000_SYMERRS); + adapter->stats.sec += E1000_READ_REG(&adapter->hw, E1000_SEC); + } + adapter->stats.crcerrs += E1000_READ_REG(&adapter->hw, E1000_CRCERRS); + adapter->stats.mpc += E1000_READ_REG(&adapter->hw, E1000_MPC); + adapter->stats.scc += E1000_READ_REG(&adapter->hw, E1000_SCC); + adapter->stats.ecol += E1000_READ_REG(&adapter->hw, E1000_ECOL); + + adapter->stats.mcc += E1000_READ_REG(&adapter->hw, E1000_MCC); + adapter->stats.latecol += E1000_READ_REG(&adapter->hw, E1000_LATECOL); + adapter->stats.colc += E1000_READ_REG(&adapter->hw, E1000_COLC); + adapter->stats.dc += E1000_READ_REG(&adapter->hw, E1000_DC); + adapter->stats.rlec += E1000_READ_REG(&adapter->hw, E1000_RLEC); + adapter->stats.xonrxc += E1000_READ_REG(&adapter->hw, E1000_XONRXC); + adapter->stats.xontxc += E1000_READ_REG(&adapter->hw, E1000_XONTXC); + adapter->stats.xoffrxc += E1000_READ_REG(&adapter->hw, E1000_XOFFRXC); + adapter->stats.xofftxc += E1000_READ_REG(&adapter->hw, E1000_XOFFTXC); + adapter->stats.fcruc += E1000_READ_REG(&adapter->hw, E1000_FCRUC); + adapter->stats.prc64 += E1000_READ_REG(&adapter->hw, E1000_PRC64); + adapter->stats.prc127 += E1000_READ_REG(&adapter->hw, E1000_PRC127); + adapter->stats.prc255 += E1000_READ_REG(&adapter->hw, E1000_PRC255); + adapter->stats.prc511 += E1000_READ_REG(&adapter->hw, E1000_PRC511); + adapter->stats.prc1023 += E1000_READ_REG(&adapter->hw, E1000_PRC1023); + adapter->stats.prc1522 += E1000_READ_REG(&adapter->hw, E1000_PRC1522); + adapter->stats.gprc += E1000_READ_REG(&adapter->hw, E1000_GPRC); + adapter->stats.bprc += E1000_READ_REG(&adapter->hw, E1000_BPRC); + adapter->stats.mprc += E1000_READ_REG(&adapter->hw, E1000_MPRC); + adapter->stats.gptc += E1000_READ_REG(&adapter->hw, E1000_GPTC); + + /* For the 64-bit byte counters the low dword must be read first. */ + /* Both registers clear on the read of the high dword */ + + adapter->stats.gorc += E1000_READ_REG(&adapter->hw, E1000_GORCL) + + ((u64)E1000_READ_REG(&adapter->hw, E1000_GORCH) << 32); + adapter->stats.gotc += E1000_READ_REG(&adapter->hw, E1000_GOTCL) + + ((u64)E1000_READ_REG(&adapter->hw, E1000_GOTCH) << 32); + + adapter->stats.rnbc += E1000_READ_REG(&adapter->hw, E1000_RNBC); + adapter->stats.ruc += E1000_READ_REG(&adapter->hw, E1000_RUC); + adapter->stats.rfc += E1000_READ_REG(&adapter->hw, E1000_RFC); + adapter->stats.roc += E1000_READ_REG(&adapter->hw, E1000_ROC); + adapter->stats.rjc += E1000_READ_REG(&adapter->hw, E1000_RJC); + + adapter->stats.tor += E1000_READ_REG(&adapter->hw, E1000_TORH); + adapter->stats.tot += E1000_READ_REG(&adapter->hw, E1000_TOTH); + + adapter->stats.tpr += E1000_READ_REG(&adapter->hw, E1000_TPR); + adapter->stats.tpt += E1000_READ_REG(&adapter->hw, E1000_TPT); + adapter->stats.ptc64 += E1000_READ_REG(&adapter->hw, E1000_PTC64); + adapter->stats.ptc127 += E1000_READ_REG(&adapter->hw, E1000_PTC127); + adapter->stats.ptc255 += E1000_READ_REG(&adapter->hw, E1000_PTC255); + adapter->stats.ptc511 += E1000_READ_REG(&adapter->hw, E1000_PTC511); + adapter->stats.ptc1023 += E1000_READ_REG(&adapter->hw, E1000_PTC1023); + adapter->stats.ptc1522 += E1000_READ_REG(&adapter->hw, E1000_PTC1522); + adapter->stats.mptc += E1000_READ_REG(&adapter->hw, E1000_MPTC); + adapter->stats.bptc += E1000_READ_REG(&adapter->hw, E1000_BPTC); + + if (adapter->hw.mac.type >= e1000_82543) { + adapter->stats.algnerrc += + E1000_READ_REG(&adapter->hw, E1000_ALGNERRC); + adapter->stats.rxerrc += + E1000_READ_REG(&adapter->hw, E1000_RXERRC); + adapter->stats.tncrs += + E1000_READ_REG(&adapter->hw, E1000_TNCRS); + adapter->stats.cexterr += + E1000_READ_REG(&adapter->hw, E1000_CEXTERR); + adapter->stats.tsctc += + E1000_READ_REG(&adapter->hw, E1000_TSCTC); + adapter->stats.tsctfc += + E1000_READ_REG(&adapter->hw, E1000_TSCTFC); + } + ifp = adapter->ifp; + + ifp->if_collisions = adapter->stats.colc; + + /* Rx Errors */ + ifp->if_ierrors = adapter->dropped_pkts + adapter->stats.rxerrc + + adapter->stats.crcerrs + adapter->stats.algnerrc + + adapter->stats.ruc + adapter->stats.roc + + adapter->stats.mpc + adapter->stats.cexterr; + + /* Tx Errors */ + ifp->if_oerrors = adapter->stats.ecol + + adapter->stats.latecol + adapter->watchdog_events; +} + +/* Export a single 32-bit register via a read-only sysctl. */ +static int +lem_sysctl_reg_handler(SYSCTL_HANDLER_ARGS) +{ + struct adapter *adapter; + u_int val; + + adapter = oidp->oid_arg1; + val = E1000_READ_REG(&adapter->hw, oidp->oid_arg2); + return (sysctl_handle_int(oidp, &val, 0, req)); +} + +/* + * Add sysctl variables, one per statistic, to the system. + */ +static void +lem_add_hw_stats(struct adapter *adapter) +{ + device_t dev = adapter->dev; + + struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(dev); + struct sysctl_oid *tree = device_get_sysctl_tree(dev); + struct sysctl_oid_list *child = SYSCTL_CHILDREN(tree); + struct e1000_hw_stats *stats = &adapter->stats; + + struct sysctl_oid *stat_node; + struct sysctl_oid_list *stat_list; + + /* Driver Statistics */ + SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "mbuf_alloc_fail", + CTLFLAG_RD, &adapter->mbuf_alloc_failed, + "Std mbuf failed"); + SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "cluster_alloc_fail", + CTLFLAG_RD, &adapter->mbuf_cluster_failed, + "Std mbuf cluster failed"); + SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "dropped", + CTLFLAG_RD, &adapter->dropped_pkts, + "Driver dropped packets"); + SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "tx_dma_fail", + CTLFLAG_RD, &adapter->no_tx_dma_setup, + "Driver tx dma failure in xmit"); + SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "tx_desc_fail1", + CTLFLAG_RD, &adapter->no_tx_desc_avail1, + "Not enough tx descriptors failure in xmit"); + SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "tx_desc_fail2", + CTLFLAG_RD, &adapter->no_tx_desc_avail2, + "Not enough tx descriptors failure in xmit"); + SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "rx_overruns", + CTLFLAG_RD, &adapter->rx_overruns, + "RX overruns"); + SYSCTL_ADD_ULONG(ctx, child, OID_AUTO, "watchdog_timeouts", + CTLFLAG_RD, &adapter->watchdog_events, + "Watchdog timeouts"); + + SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "device_control", + CTLFLAG_RD, adapter, E1000_CTRL, + lem_sysctl_reg_handler, "IU", + "Device Control Register"); + SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "rx_control", + CTLFLAG_RD, adapter, E1000_RCTL, + lem_sysctl_reg_handler, "IU", + "Receiver Control Register"); + SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "fc_high_water", + CTLFLAG_RD, &adapter->hw.fc.high_water, 0, + "Flow Control High Watermark"); + SYSCTL_ADD_UINT(ctx, child, OID_AUTO, "fc_low_water", + CTLFLAG_RD, &adapter->hw.fc.low_water, 0, + "Flow Control Low Watermark"); + SYSCTL_ADD_QUAD(ctx, child, OID_AUTO, "fifo_workaround", + CTLFLAG_RD, &adapter->tx_fifo_wrk_cnt, + "TX FIFO workaround events"); + SYSCTL_ADD_QUAD(ctx, child, OID_AUTO, "fifo_reset", + CTLFLAG_RD, &adapter->tx_fifo_reset_cnt, + "TX FIFO resets"); + + SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "txd_head", + CTLFLAG_RD, adapter, E1000_TDH(0), + lem_sysctl_reg_handler, "IU", + "Transmit Descriptor Head"); + SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "txd_tail", + CTLFLAG_RD, adapter, E1000_TDT(0), + lem_sysctl_reg_handler, "IU", + "Transmit Descriptor Tail"); + SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "rxd_head", + CTLFLAG_RD, adapter, E1000_RDH(0), + lem_sysctl_reg_handler, "IU", + "Receive Descriptor Head"); + SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "rxd_tail", + CTLFLAG_RD, adapter, E1000_RDT(0), + lem_sysctl_reg_handler, "IU", + "Receive Descriptor Tail"); + + + /* MAC stats get their own sub node */ + + stat_node = SYSCTL_ADD_NODE(ctx, child, OID_AUTO, "mac_stats", + CTLFLAG_RD, NULL, "Statistics"); + stat_list = SYSCTL_CHILDREN(stat_node); + + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "excess_coll", + CTLFLAG_RD, &stats->ecol, + "Excessive collisions"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "single_coll", + CTLFLAG_RD, &stats->scc, + "Single collisions"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "multiple_coll", + CTLFLAG_RD, &stats->mcc, + "Multiple collisions"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "late_coll", + CTLFLAG_RD, &stats->latecol, + "Late collisions"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "collision_count", + CTLFLAG_RD, &stats->colc, + "Collision Count"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "symbol_errors", + CTLFLAG_RD, &adapter->stats.symerrs, + "Symbol Errors"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "sequence_errors", + CTLFLAG_RD, &adapter->stats.sec, + "Sequence Errors"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "defer_count", + CTLFLAG_RD, &adapter->stats.dc, + "Defer Count"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "missed_packets", + CTLFLAG_RD, &adapter->stats.mpc, + "Missed Packets"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "recv_no_buff", + CTLFLAG_RD, &adapter->stats.rnbc, + "Receive No Buffers"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "recv_undersize", + CTLFLAG_RD, &adapter->stats.ruc, + "Receive Undersize"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "recv_fragmented", + CTLFLAG_RD, &adapter->stats.rfc, + "Fragmented Packets Received "); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "recv_oversize", + CTLFLAG_RD, &adapter->stats.roc, + "Oversized Packets Received"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "recv_jabber", + CTLFLAG_RD, &adapter->stats.rjc, + "Recevied Jabber"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "recv_errs", + CTLFLAG_RD, &adapter->stats.rxerrc, + "Receive Errors"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "crc_errs", + CTLFLAG_RD, &adapter->stats.crcerrs, + "CRC errors"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "alignment_errs", + CTLFLAG_RD, &adapter->stats.algnerrc, + "Alignment Errors"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "coll_ext_errs", + CTLFLAG_RD, &adapter->stats.cexterr, + "Collision/Carrier extension errors"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "xon_recvd", + CTLFLAG_RD, &adapter->stats.xonrxc, + "XON Received"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "xon_txd", + CTLFLAG_RD, &adapter->stats.xontxc, + "XON Transmitted"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "xoff_recvd", + CTLFLAG_RD, &adapter->stats.xoffrxc, + "XOFF Received"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "xoff_txd", + CTLFLAG_RD, &adapter->stats.xofftxc, + "XOFF Transmitted"); + + /* Packet Reception Stats */ + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "total_pkts_recvd", + CTLFLAG_RD, &adapter->stats.tpr, + "Total Packets Received "); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "good_pkts_recvd", + CTLFLAG_RD, &adapter->stats.gprc, + "Good Packets Received"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "bcast_pkts_recvd", + CTLFLAG_RD, &adapter->stats.bprc, + "Broadcast Packets Received"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "mcast_pkts_recvd", + CTLFLAG_RD, &adapter->stats.mprc, + "Multicast Packets Received"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "rx_frames_64", + CTLFLAG_RD, &adapter->stats.prc64, + "64 byte frames received "); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "rx_frames_65_127", + CTLFLAG_RD, &adapter->stats.prc127, + "65-127 byte frames received"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "rx_frames_128_255", + CTLFLAG_RD, &adapter->stats.prc255, + "128-255 byte frames received"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "rx_frames_256_511", + CTLFLAG_RD, &adapter->stats.prc511, + "256-511 byte frames received"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "rx_frames_512_1023", + CTLFLAG_RD, &adapter->stats.prc1023, + "512-1023 byte frames received"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "rx_frames_1024_1522", + CTLFLAG_RD, &adapter->stats.prc1522, + "1023-1522 byte frames received"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "good_octets_recvd", + CTLFLAG_RD, &adapter->stats.gorc, + "Good Octets Received"); + + /* Packet Transmission Stats */ + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "good_octets_txd", + CTLFLAG_RD, &adapter->stats.gotc, + "Good Octets Transmitted"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "total_pkts_txd", + CTLFLAG_RD, &adapter->stats.tpt, + "Total Packets Transmitted"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "good_pkts_txd", + CTLFLAG_RD, &adapter->stats.gptc, + "Good Packets Transmitted"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "bcast_pkts_txd", + CTLFLAG_RD, &adapter->stats.bptc, + "Broadcast Packets Transmitted"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "mcast_pkts_txd", + CTLFLAG_RD, &adapter->stats.mptc, + "Multicast Packets Transmitted"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "tx_frames_64", + CTLFLAG_RD, &adapter->stats.ptc64, + "64 byte frames transmitted "); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "tx_frames_65_127", + CTLFLAG_RD, &adapter->stats.ptc127, + "65-127 byte frames transmitted"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "tx_frames_128_255", + CTLFLAG_RD, &adapter->stats.ptc255, + "128-255 byte frames transmitted"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "tx_frames_256_511", + CTLFLAG_RD, &adapter->stats.ptc511, + "256-511 byte frames transmitted"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "tx_frames_512_1023", + CTLFLAG_RD, &adapter->stats.ptc1023, + "512-1023 byte frames transmitted"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "tx_frames_1024_1522", + CTLFLAG_RD, &adapter->stats.ptc1522, + "1024-1522 byte frames transmitted"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "tso_txd", + CTLFLAG_RD, &adapter->stats.tsctc, + "TSO Contexts Transmitted"); + SYSCTL_ADD_QUAD(ctx, stat_list, OID_AUTO, "tso_ctx_fail", + CTLFLAG_RD, &adapter->stats.tsctfc, + "TSO Contexts Failed"); +} + +/********************************************************************** + * + * This routine provides a way to dump out the adapter eeprom, + * often a useful debug/service tool. This only dumps the first + * 32 words, stuff that matters is in that extent. + * + **********************************************************************/ + +static int +lem_sysctl_nvm_info(SYSCTL_HANDLER_ARGS) +{ + struct adapter *adapter; + int error; + int result; + + result = -1; + error = sysctl_handle_int(oidp, &result, 0, req); + + if (error || !req->newptr) + return (error); + + /* + * This value will cause a hex dump of the + * first 32 16-bit words of the EEPROM to + * the screen. + */ + if (result == 1) { + adapter = (struct adapter *)arg1; + lem_print_nvm_info(adapter); + } + + return (error); +} + +static void +lem_print_nvm_info(struct adapter *adapter) +{ + u16 eeprom_data; + int i, j, row = 0; + + /* Its a bit crude, but it gets the job done */ + printf("\nInterface EEPROM Dump:\n"); + printf("Offset\n0x0000 "); + for (i = 0, j = 0; i < 32; i++, j++) { + if (j == 8) { /* Make the offset block */ + j = 0; ++row; + printf("\n0x00%x0 ",row); + } + e1000_read_nvm(&adapter->hw, i, 1, &eeprom_data); + printf("%04x ", eeprom_data); + } + printf("\n"); +} + +static int +lem_sysctl_int_delay(SYSCTL_HANDLER_ARGS) +{ + struct em_int_delay_info *info; + struct adapter *adapter; + u32 regval; + int error; + int usecs; + int ticks; + + info = (struct em_int_delay_info *)arg1; + usecs = info->value; + error = sysctl_handle_int(oidp, &usecs, 0, req); + if (error != 0 || req->newptr == NULL) + return (error); + if (usecs < 0 || usecs > EM_TICKS_TO_USECS(65535)) + return (EINVAL); + info->value = usecs; + ticks = EM_USECS_TO_TICKS(usecs); + + adapter = info->adapter; + + EM_CORE_LOCK(adapter); + regval = E1000_READ_OFFSET(&adapter->hw, info->offset); + regval = (regval & ~0xffff) | (ticks & 0xffff); + /* Handle a few special cases. */ + switch (info->offset) { + case E1000_RDTR: + break; + case E1000_TIDV: + if (ticks == 0) { + adapter->txd_cmd &= ~E1000_TXD_CMD_IDE; + /* Don't write 0 into the TIDV register. */ + regval++; + } else + adapter->txd_cmd |= E1000_TXD_CMD_IDE; + break; + } + E1000_WRITE_OFFSET(&adapter->hw, info->offset, regval); + EM_CORE_UNLOCK(adapter); + return (0); +} + +static void +lem_add_int_delay_sysctl(struct adapter *adapter, const char *name, + const char *description, struct em_int_delay_info *info, + int offset, int value) +{ + info->adapter = adapter; + info->offset = offset; + info->value = value; + SYSCTL_ADD_PROC(device_get_sysctl_ctx(adapter->dev), + SYSCTL_CHILDREN(device_get_sysctl_tree(adapter->dev)), + OID_AUTO, name, CTLTYPE_INT|CTLFLAG_RW, + info, 0, lem_sysctl_int_delay, "I", description); +} + +static void +lem_set_flow_cntrl(struct adapter *adapter, const char *name, + const char *description, int *limit, int value) +{ + *limit = value; + SYSCTL_ADD_INT(device_get_sysctl_ctx(adapter->dev), + SYSCTL_CHILDREN(device_get_sysctl_tree(adapter->dev)), + OID_AUTO, name, CTLTYPE_INT|CTLFLAG_RW, limit, value, description); +} + +#ifndef EM_LEGACY_IRQ +static void +lem_add_rx_process_limit(struct adapter *adapter, const char *name, + const char *description, int *limit, int value) +{ + *limit = value; + SYSCTL_ADD_INT(device_get_sysctl_ctx(adapter->dev), + SYSCTL_CHILDREN(device_get_sysctl_tree(adapter->dev)), + OID_AUTO, name, CTLTYPE_INT|CTLFLAG_RW, limit, value, description); +} +#endif |