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7cd2a9fad7
There is no "version 2" of the "Lesser" General Public License. It is either "GPL version 2.0" or "Lesser GPL version 2.1". This patch replaces all occurrences of "Lesser GPL version 2" with "Lesser GPL version 2.1" in comment section. Signed-off-by: Chetan Pant <chetan4windows@gmail.com> Message-Id: <20201023124134.20083-1-chetan4windows@gmail.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com>
268 lines
7.9 KiB
C
268 lines
7.9 KiB
C
/*
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* QEMU e1000(e) emulation - shared code
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*
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* Copyright (c) 2008 Qumranet
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*
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* Based on work done by:
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* Nir Peleg, Tutis Systems Ltd. for Qumranet Inc.
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* Copyright (c) 2007 Dan Aloni
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* Copyright (c) 2004 Antony T Curtis
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "qemu/osdep.h"
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#include "qemu/units.h"
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#include "hw/pci/pci.h"
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#include "net/net.h"
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#include "e1000x_common.h"
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#include "trace.h"
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bool e1000x_rx_ready(PCIDevice *d, uint32_t *mac)
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{
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bool link_up = mac[STATUS] & E1000_STATUS_LU;
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bool rx_enabled = mac[RCTL] & E1000_RCTL_EN;
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bool pci_master = d->config[PCI_COMMAND] & PCI_COMMAND_MASTER;
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if (!link_up || !rx_enabled || !pci_master) {
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trace_e1000x_rx_can_recv_disabled(link_up, rx_enabled, pci_master);
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return false;
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}
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return true;
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}
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bool e1000x_is_vlan_packet(const uint8_t *buf, uint16_t vet)
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{
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uint16_t eth_proto = lduw_be_p(buf + 12);
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bool res = (eth_proto == vet);
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trace_e1000x_vlan_is_vlan_pkt(res, eth_proto, vet);
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return res;
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}
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bool e1000x_rx_group_filter(uint32_t *mac, const uint8_t *buf)
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{
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static const int mta_shift[] = { 4, 3, 2, 0 };
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uint32_t f, ra[2], *rp, rctl = mac[RCTL];
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for (rp = mac + RA; rp < mac + RA + 32; rp += 2) {
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if (!(rp[1] & E1000_RAH_AV)) {
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continue;
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}
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ra[0] = cpu_to_le32(rp[0]);
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ra[1] = cpu_to_le32(rp[1]);
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if (!memcmp(buf, (uint8_t *)ra, 6)) {
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trace_e1000x_rx_flt_ucast_match((int)(rp - mac - RA) / 2,
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MAC_ARG(buf));
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return true;
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}
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}
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trace_e1000x_rx_flt_ucast_mismatch(MAC_ARG(buf));
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f = mta_shift[(rctl >> E1000_RCTL_MO_SHIFT) & 3];
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f = (((buf[5] << 8) | buf[4]) >> f) & 0xfff;
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if (mac[MTA + (f >> 5)] & (1 << (f & 0x1f))) {
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e1000x_inc_reg_if_not_full(mac, MPRC);
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return true;
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}
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trace_e1000x_rx_flt_inexact_mismatch(MAC_ARG(buf),
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(rctl >> E1000_RCTL_MO_SHIFT) & 3,
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f >> 5,
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mac[MTA + (f >> 5)]);
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return false;
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}
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bool e1000x_hw_rx_enabled(uint32_t *mac)
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{
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if (!(mac[STATUS] & E1000_STATUS_LU)) {
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trace_e1000x_rx_link_down(mac[STATUS]);
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return false;
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}
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if (!(mac[RCTL] & E1000_RCTL_EN)) {
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trace_e1000x_rx_disabled(mac[RCTL]);
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return false;
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}
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return true;
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}
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bool e1000x_is_oversized(uint32_t *mac, size_t size)
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{
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/* this is the size past which hardware will
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drop packets when setting LPE=0 */
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static const int maximum_ethernet_vlan_size = 1522;
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/* this is the size past which hardware will
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drop packets when setting LPE=1 */
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static const int maximum_ethernet_lpe_size = 16 * KiB;
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if ((size > maximum_ethernet_lpe_size ||
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(size > maximum_ethernet_vlan_size
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&& !(mac[RCTL] & E1000_RCTL_LPE)))
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&& !(mac[RCTL] & E1000_RCTL_SBP)) {
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e1000x_inc_reg_if_not_full(mac, ROC);
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trace_e1000x_rx_oversized(size);
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return true;
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}
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return false;
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}
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void e1000x_restart_autoneg(uint32_t *mac, uint16_t *phy, QEMUTimer *timer)
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{
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e1000x_update_regs_on_link_down(mac, phy);
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trace_e1000x_link_negotiation_start();
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timer_mod(timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 500);
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}
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void e1000x_reset_mac_addr(NICState *nic, uint32_t *mac_regs,
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uint8_t *mac_addr)
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{
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int i;
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mac_regs[RA] = 0;
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mac_regs[RA + 1] = E1000_RAH_AV;
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for (i = 0; i < 4; i++) {
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mac_regs[RA] |= mac_addr[i] << (8 * i);
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mac_regs[RA + 1] |=
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(i < 2) ? mac_addr[i + 4] << (8 * i) : 0;
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}
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qemu_format_nic_info_str(qemu_get_queue(nic), mac_addr);
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trace_e1000x_mac_indicate(MAC_ARG(mac_addr));
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}
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void e1000x_update_regs_on_autoneg_done(uint32_t *mac, uint16_t *phy)
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{
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e1000x_update_regs_on_link_up(mac, phy);
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phy[PHY_LP_ABILITY] |= MII_LPAR_LPACK;
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phy[PHY_STATUS] |= MII_SR_AUTONEG_COMPLETE;
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trace_e1000x_link_negotiation_done();
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}
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void
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e1000x_core_prepare_eeprom(uint16_t *eeprom,
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const uint16_t *templ,
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uint32_t templ_size,
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uint16_t dev_id,
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const uint8_t *macaddr)
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{
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uint16_t checksum = 0;
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int i;
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memmove(eeprom, templ, templ_size);
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for (i = 0; i < 3; i++) {
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eeprom[i] = (macaddr[2 * i + 1] << 8) | macaddr[2 * i];
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}
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eeprom[11] = eeprom[13] = dev_id;
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for (i = 0; i < EEPROM_CHECKSUM_REG; i++) {
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checksum += eeprom[i];
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}
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checksum = (uint16_t) EEPROM_SUM - checksum;
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eeprom[EEPROM_CHECKSUM_REG] = checksum;
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}
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uint32_t
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e1000x_rxbufsize(uint32_t rctl)
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{
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rctl &= E1000_RCTL_BSEX | E1000_RCTL_SZ_16384 | E1000_RCTL_SZ_8192 |
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E1000_RCTL_SZ_4096 | E1000_RCTL_SZ_2048 | E1000_RCTL_SZ_1024 |
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E1000_RCTL_SZ_512 | E1000_RCTL_SZ_256;
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switch (rctl) {
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case E1000_RCTL_BSEX | E1000_RCTL_SZ_16384:
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return 16384;
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case E1000_RCTL_BSEX | E1000_RCTL_SZ_8192:
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return 8192;
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case E1000_RCTL_BSEX | E1000_RCTL_SZ_4096:
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return 4096;
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case E1000_RCTL_SZ_1024:
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return 1024;
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case E1000_RCTL_SZ_512:
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return 512;
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case E1000_RCTL_SZ_256:
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return 256;
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}
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return 2048;
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}
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void
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e1000x_update_rx_total_stats(uint32_t *mac,
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size_t data_size,
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size_t data_fcs_size)
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{
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static const int PRCregs[6] = { PRC64, PRC127, PRC255, PRC511,
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PRC1023, PRC1522 };
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e1000x_increase_size_stats(mac, PRCregs, data_fcs_size);
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e1000x_inc_reg_if_not_full(mac, TPR);
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mac[GPRC] = mac[TPR];
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/* TOR - Total Octets Received:
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* This register includes bytes received in a packet from the <Destination
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* Address> field through the <CRC> field, inclusively.
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* Always include FCS length (4) in size.
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*/
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e1000x_grow_8reg_if_not_full(mac, TORL, data_size + 4);
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mac[GORCL] = mac[TORL];
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mac[GORCH] = mac[TORH];
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}
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void
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e1000x_increase_size_stats(uint32_t *mac, const int *size_regs, int size)
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{
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if (size > 1023) {
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e1000x_inc_reg_if_not_full(mac, size_regs[5]);
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} else if (size > 511) {
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e1000x_inc_reg_if_not_full(mac, size_regs[4]);
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} else if (size > 255) {
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e1000x_inc_reg_if_not_full(mac, size_regs[3]);
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} else if (size > 127) {
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e1000x_inc_reg_if_not_full(mac, size_regs[2]);
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} else if (size > 64) {
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e1000x_inc_reg_if_not_full(mac, size_regs[1]);
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} else if (size == 64) {
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e1000x_inc_reg_if_not_full(mac, size_regs[0]);
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}
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}
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void
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e1000x_read_tx_ctx_descr(struct e1000_context_desc *d,
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e1000x_txd_props *props)
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{
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uint32_t op = le32_to_cpu(d->cmd_and_length);
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props->ipcss = d->lower_setup.ip_fields.ipcss;
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props->ipcso = d->lower_setup.ip_fields.ipcso;
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props->ipcse = le16_to_cpu(d->lower_setup.ip_fields.ipcse);
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props->tucss = d->upper_setup.tcp_fields.tucss;
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props->tucso = d->upper_setup.tcp_fields.tucso;
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props->tucse = le16_to_cpu(d->upper_setup.tcp_fields.tucse);
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props->paylen = op & 0xfffff;
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props->hdr_len = d->tcp_seg_setup.fields.hdr_len;
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props->mss = le16_to_cpu(d->tcp_seg_setup.fields.mss);
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props->ip = (op & E1000_TXD_CMD_IP) ? 1 : 0;
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props->tcp = (op & E1000_TXD_CMD_TCP) ? 1 : 0;
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props->tse = (op & E1000_TXD_CMD_TSE) ? 1 : 0;
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}
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