diff options
Diffstat (limited to 'hw/net/e1000x_common.c')
| -rw-r--r-- | hw/net/e1000x_common.c | 267 |
1 files changed, 267 insertions, 0 deletions
diff --git a/hw/net/e1000x_common.c b/hw/net/e1000x_common.c new file mode 100644 index 0000000000..94f85c98c8 --- /dev/null +++ b/hw/net/e1000x_common.c @@ -0,0 +1,267 @@ +/* +* QEMU e1000(e) emulation - shared code +* +* Copyright (c) 2008 Qumranet +* +* Based on work done by: +* Nir Peleg, Tutis Systems Ltd. for Qumranet Inc. +* Copyright (c) 2007 Dan Aloni +* Copyright (c) 2004 Antony T Curtis +* +* This library is free software; you can redistribute it and/or +* modify it under the terms of the GNU Lesser General Public +* License as published by the Free Software Foundation; either +* version 2 of the License, or (at your option) any later version. +* +* This library is distributed in the hope that it will be useful, +* but WITHOUT ANY WARRANTY; without even the implied warranty of +* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +* Lesser General Public License for more details. +* +* You should have received a copy of the GNU Lesser General Public +* License along with this library; if not, see <http://www.gnu.org/licenses/>. +*/ + +#include "qemu/osdep.h" +#include "hw/hw.h" +#include "hw/pci/pci.h" +#include "net/net.h" + +#include "e1000x_common.h" + +#include "trace.h" + +bool e1000x_rx_ready(PCIDevice *d, uint32_t *mac) +{ + bool link_up = mac[STATUS] & E1000_STATUS_LU; + bool rx_enabled = mac[RCTL] & E1000_RCTL_EN; + bool pci_master = d->config[PCI_COMMAND] & PCI_COMMAND_MASTER; + + if (!link_up || !rx_enabled || !pci_master) { + trace_e1000x_rx_can_recv_disabled(link_up, rx_enabled, pci_master); + return false; + } + + return true; +} + +bool e1000x_is_vlan_packet(const uint8_t *buf, uint16_t vet) +{ + uint16_t eth_proto = be16_to_cpup((uint16_t *)(buf + 12)); + bool res = (eth_proto == vet); + + trace_e1000x_vlan_is_vlan_pkt(res, eth_proto, vet); + + return res; +} + +bool e1000x_rx_group_filter(uint32_t *mac, const uint8_t *buf) +{ + static const int mta_shift[] = { 4, 3, 2, 0 }; + uint32_t f, ra[2], *rp, rctl = mac[RCTL]; + + for (rp = mac + RA; rp < mac + RA + 32; rp += 2) { + if (!(rp[1] & E1000_RAH_AV)) { + continue; + } + ra[0] = cpu_to_le32(rp[0]); + ra[1] = cpu_to_le32(rp[1]); + if (!memcmp(buf, (uint8_t *)ra, 6)) { + trace_e1000x_rx_flt_ucast_match((int)(rp - mac - RA) / 2, + MAC_ARG(buf)); + return true; + } + } + trace_e1000x_rx_flt_ucast_mismatch(MAC_ARG(buf)); + + f = mta_shift[(rctl >> E1000_RCTL_MO_SHIFT) & 3]; + f = (((buf[5] << 8) | buf[4]) >> f) & 0xfff; + if (mac[MTA + (f >> 5)] & (1 << (f & 0x1f))) { + e1000x_inc_reg_if_not_full(mac, MPRC); + return true; + } + + trace_e1000x_rx_flt_inexact_mismatch(MAC_ARG(buf), + (rctl >> E1000_RCTL_MO_SHIFT) & 3, + f >> 5, + mac[MTA + (f >> 5)]); + + return false; +} + +bool e1000x_hw_rx_enabled(uint32_t *mac) +{ + if (!(mac[STATUS] & E1000_STATUS_LU)) { + trace_e1000x_rx_link_down(mac[STATUS]); + return false; + } + + if (!(mac[RCTL] & E1000_RCTL_EN)) { + trace_e1000x_rx_disabled(mac[RCTL]); + return false; + } + + return true; +} + +bool e1000x_is_oversized(uint32_t *mac, size_t size) +{ + /* this is the size past which hardware will + drop packets when setting LPE=0 */ + static const int maximum_ethernet_vlan_size = 1522; + /* this is the size past which hardware will + drop packets when setting LPE=1 */ + static const int maximum_ethernet_lpe_size = 16384; + + if ((size > maximum_ethernet_lpe_size || + (size > maximum_ethernet_vlan_size + && !(mac[RCTL] & E1000_RCTL_LPE))) + && !(mac[RCTL] & E1000_RCTL_SBP)) { + e1000x_inc_reg_if_not_full(mac, ROC); + trace_e1000x_rx_oversized(size); + return true; + } + + return false; +} + +void e1000x_restart_autoneg(uint32_t *mac, uint16_t *phy, QEMUTimer *timer) +{ + e1000x_update_regs_on_link_down(mac, phy); + trace_e1000x_link_negotiation_start(); + timer_mod(timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 500); +} + +void e1000x_reset_mac_addr(NICState *nic, uint32_t *mac_regs, + uint8_t *mac_addr) +{ + int i; + + mac_regs[RA] = 0; + mac_regs[RA + 1] = E1000_RAH_AV; + for (i = 0; i < 4; i++) { + mac_regs[RA] |= mac_addr[i] << (8 * i); + mac_regs[RA + 1] |= + (i < 2) ? mac_addr[i + 4] << (8 * i) : 0; + } + + qemu_format_nic_info_str(qemu_get_queue(nic), mac_addr); + trace_e1000x_mac_indicate(MAC_ARG(mac_addr)); +} + +void e1000x_update_regs_on_autoneg_done(uint32_t *mac, uint16_t *phy) +{ + e1000x_update_regs_on_link_up(mac, phy); + phy[PHY_LP_ABILITY] |= MII_LPAR_LPACK; + phy[PHY_STATUS] |= MII_SR_AUTONEG_COMPLETE; + trace_e1000x_link_negotiation_done(); +} + +void +e1000x_core_prepare_eeprom(uint16_t *eeprom, + const uint16_t *templ, + uint32_t templ_size, + uint16_t dev_id, + const uint8_t *macaddr) +{ + uint16_t checksum = 0; + int i; + + memmove(eeprom, templ, templ_size); + + for (i = 0; i < 3; i++) { + eeprom[i] = (macaddr[2 * i + 1] << 8) | macaddr[2 * i]; + } + + eeprom[11] = eeprom[13] = dev_id; + + for (i = 0; i < EEPROM_CHECKSUM_REG; i++) { + checksum += eeprom[i]; + } + + checksum = (uint16_t) EEPROM_SUM - checksum; + + eeprom[EEPROM_CHECKSUM_REG] = checksum; +} + +uint32_t +e1000x_rxbufsize(uint32_t rctl) +{ + rctl &= E1000_RCTL_BSEX | E1000_RCTL_SZ_16384 | E1000_RCTL_SZ_8192 | + E1000_RCTL_SZ_4096 | E1000_RCTL_SZ_2048 | E1000_RCTL_SZ_1024 | + E1000_RCTL_SZ_512 | E1000_RCTL_SZ_256; + switch (rctl) { + case E1000_RCTL_BSEX | E1000_RCTL_SZ_16384: + return 16384; + case E1000_RCTL_BSEX | E1000_RCTL_SZ_8192: + return 8192; + case E1000_RCTL_BSEX | E1000_RCTL_SZ_4096: + return 4096; + case E1000_RCTL_SZ_1024: + return 1024; + case E1000_RCTL_SZ_512: + return 512; + case E1000_RCTL_SZ_256: + return 256; + } + return 2048; +} + +void +e1000x_update_rx_total_stats(uint32_t *mac, + size_t data_size, + size_t data_fcs_size) +{ + static const int PRCregs[6] = { PRC64, PRC127, PRC255, PRC511, + PRC1023, PRC1522 }; + + e1000x_increase_size_stats(mac, PRCregs, data_fcs_size); + e1000x_inc_reg_if_not_full(mac, TPR); + mac[GPRC] = mac[TPR]; + /* TOR - Total Octets Received: + * This register includes bytes received in a packet from the <Destination + * Address> field through the <CRC> field, inclusively. + * Always include FCS length (4) in size. + */ + e1000x_grow_8reg_if_not_full(mac, TORL, data_size + 4); + mac[GORCL] = mac[TORL]; + mac[GORCH] = mac[TORH]; +} + +void +e1000x_increase_size_stats(uint32_t *mac, const int *size_regs, int size) +{ + if (size > 1023) { + e1000x_inc_reg_if_not_full(mac, size_regs[5]); + } else if (size > 511) { + e1000x_inc_reg_if_not_full(mac, size_regs[4]); + } else if (size > 255) { + e1000x_inc_reg_if_not_full(mac, size_regs[3]); + } else if (size > 127) { + e1000x_inc_reg_if_not_full(mac, size_regs[2]); + } else if (size > 64) { + e1000x_inc_reg_if_not_full(mac, size_regs[1]); + } else if (size == 64) { + e1000x_inc_reg_if_not_full(mac, size_regs[0]); + } +} + +void +e1000x_read_tx_ctx_descr(struct e1000_context_desc *d, + e1000x_txd_props *props) +{ + uint32_t op = le32_to_cpu(d->cmd_and_length); + + props->ipcss = d->lower_setup.ip_fields.ipcss; + props->ipcso = d->lower_setup.ip_fields.ipcso; + props->ipcse = le16_to_cpu(d->lower_setup.ip_fields.ipcse); + props->tucss = d->upper_setup.tcp_fields.tucss; + props->tucso = d->upper_setup.tcp_fields.tucso; + props->tucse = le16_to_cpu(d->upper_setup.tcp_fields.tucse); + props->paylen = op & 0xfffff; + props->hdr_len = d->tcp_seg_setup.fields.hdr_len; + props->mss = le16_to_cpu(d->tcp_seg_setup.fields.mss); + props->ip = (op & E1000_TXD_CMD_IP) ? 1 : 0; + props->tcp = (op & E1000_TXD_CMD_TCP) ? 1 : 0; + props->tse = (op & E1000_TXD_CMD_TSE) ? 1 : 0; +} |