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25#include "qemu/osdep.h"
26#include "qemu/units.h"
27#include "hw/pci/pci.h"
28#include "net/net.h"
29
30#include "e1000x_common.h"
31
32#include "trace.h"
33
34bool e1000x_rx_ready(PCIDevice *d, uint32_t *mac)
35{
36 bool link_up = mac[STATUS] & E1000_STATUS_LU;
37 bool rx_enabled = mac[RCTL] & E1000_RCTL_EN;
38 bool pci_master = d->config[PCI_COMMAND] & PCI_COMMAND_MASTER;
39
40 if (!link_up || !rx_enabled || !pci_master) {
41 trace_e1000x_rx_can_recv_disabled(link_up, rx_enabled, pci_master);
42 return false;
43 }
44
45 return true;
46}
47
48bool e1000x_is_vlan_packet(const uint8_t *buf, uint16_t vet)
49{
50 uint16_t eth_proto = lduw_be_p(buf + 12);
51 bool res = (eth_proto == vet);
52
53 trace_e1000x_vlan_is_vlan_pkt(res, eth_proto, vet);
54
55 return res;
56}
57
58bool e1000x_rx_group_filter(uint32_t *mac, const uint8_t *buf)
59{
60 static const int mta_shift[] = { 4, 3, 2, 0 };
61 uint32_t f, ra[2], *rp, rctl = mac[RCTL];
62
63 for (rp = mac + RA; rp < mac + RA + 32; rp += 2) {
64 if (!(rp[1] & E1000_RAH_AV)) {
65 continue;
66 }
67 ra[0] = cpu_to_le32(rp[0]);
68 ra[1] = cpu_to_le32(rp[1]);
69 if (!memcmp(buf, (uint8_t *)ra, 6)) {
70 trace_e1000x_rx_flt_ucast_match((int)(rp - mac - RA) / 2,
71 MAC_ARG(buf));
72 return true;
73 }
74 }
75 trace_e1000x_rx_flt_ucast_mismatch(MAC_ARG(buf));
76
77 f = mta_shift[(rctl >> E1000_RCTL_MO_SHIFT) & 3];
78 f = (((buf[5] << 8) | buf[4]) >> f) & 0xfff;
79 if (mac[MTA + (f >> 5)] & (1 << (f & 0x1f))) {
80 e1000x_inc_reg_if_not_full(mac, MPRC);
81 return true;
82 }
83
84 trace_e1000x_rx_flt_inexact_mismatch(MAC_ARG(buf),
85 (rctl >> E1000_RCTL_MO_SHIFT) & 3,
86 f >> 5,
87 mac[MTA + (f >> 5)]);
88
89 return false;
90}
91
92bool e1000x_hw_rx_enabled(uint32_t *mac)
93{
94 if (!(mac[STATUS] & E1000_STATUS_LU)) {
95 trace_e1000x_rx_link_down(mac[STATUS]);
96 return false;
97 }
98
99 if (!(mac[RCTL] & E1000_RCTL_EN)) {
100 trace_e1000x_rx_disabled(mac[RCTL]);
101 return false;
102 }
103
104 return true;
105}
106
107bool e1000x_is_oversized(uint32_t *mac, size_t size)
108{
109
110
111 static const int maximum_ethernet_vlan_size = 1522;
112
113
114 static const int maximum_ethernet_lpe_size = 16 * KiB;
115
116 if ((size > maximum_ethernet_lpe_size ||
117 (size > maximum_ethernet_vlan_size
118 && !(mac[RCTL] & E1000_RCTL_LPE)))
119 && !(mac[RCTL] & E1000_RCTL_SBP)) {
120 e1000x_inc_reg_if_not_full(mac, ROC);
121 trace_e1000x_rx_oversized(size);
122 return true;
123 }
124
125 return false;
126}
127
128void e1000x_restart_autoneg(uint32_t *mac, uint16_t *phy, QEMUTimer *timer)
129{
130 e1000x_update_regs_on_link_down(mac, phy);
131 trace_e1000x_link_negotiation_start();
132 timer_mod(timer, qemu_clock_get_ms(QEMU_CLOCK_VIRTUAL) + 500);
133}
134
135void e1000x_reset_mac_addr(NICState *nic, uint32_t *mac_regs,
136 uint8_t *mac_addr)
137{
138 int i;
139
140 mac_regs[RA] = 0;
141 mac_regs[RA + 1] = E1000_RAH_AV;
142 for (i = 0; i < 4; i++) {
143 mac_regs[RA] |= mac_addr[i] << (8 * i);
144 mac_regs[RA + 1] |=
145 (i < 2) ? mac_addr[i + 4] << (8 * i) : 0;
146 }
147
148 qemu_format_nic_info_str(qemu_get_queue(nic), mac_addr);
149 trace_e1000x_mac_indicate(MAC_ARG(mac_addr));
150}
151
152void e1000x_update_regs_on_autoneg_done(uint32_t *mac, uint16_t *phy)
153{
154 e1000x_update_regs_on_link_up(mac, phy);
155 phy[PHY_LP_ABILITY] |= MII_LPAR_LPACK;
156 phy[PHY_STATUS] |= MII_SR_AUTONEG_COMPLETE;
157 trace_e1000x_link_negotiation_done();
158}
159
160void
161e1000x_core_prepare_eeprom(uint16_t *eeprom,
162 const uint16_t *templ,
163 uint32_t templ_size,
164 uint16_t dev_id,
165 const uint8_t *macaddr)
166{
167 uint16_t checksum = 0;
168 int i;
169
170 memmove(eeprom, templ, templ_size);
171
172 for (i = 0; i < 3; i++) {
173 eeprom[i] = (macaddr[2 * i + 1] << 8) | macaddr[2 * i];
174 }
175
176 eeprom[11] = eeprom[13] = dev_id;
177
178 for (i = 0; i < EEPROM_CHECKSUM_REG; i++) {
179 checksum += eeprom[i];
180 }
181
182 checksum = (uint16_t) EEPROM_SUM - checksum;
183
184 eeprom[EEPROM_CHECKSUM_REG] = checksum;
185}
186
187uint32_t
188e1000x_rxbufsize(uint32_t rctl)
189{
190 rctl &= E1000_RCTL_BSEX | E1000_RCTL_SZ_16384 | E1000_RCTL_SZ_8192 |
191 E1000_RCTL_SZ_4096 | E1000_RCTL_SZ_2048 | E1000_RCTL_SZ_1024 |
192 E1000_RCTL_SZ_512 | E1000_RCTL_SZ_256;
193 switch (rctl) {
194 case E1000_RCTL_BSEX | E1000_RCTL_SZ_16384:
195 return 16384;
196 case E1000_RCTL_BSEX | E1000_RCTL_SZ_8192:
197 return 8192;
198 case E1000_RCTL_BSEX | E1000_RCTL_SZ_4096:
199 return 4096;
200 case E1000_RCTL_SZ_1024:
201 return 1024;
202 case E1000_RCTL_SZ_512:
203 return 512;
204 case E1000_RCTL_SZ_256:
205 return 256;
206 }
207 return 2048;
208}
209
210void
211e1000x_update_rx_total_stats(uint32_t *mac,
212 size_t data_size,
213 size_t data_fcs_size)
214{
215 static const int PRCregs[6] = { PRC64, PRC127, PRC255, PRC511,
216 PRC1023, PRC1522 };
217
218 e1000x_increase_size_stats(mac, PRCregs, data_fcs_size);
219 e1000x_inc_reg_if_not_full(mac, TPR);
220 mac[GPRC] = mac[TPR];
221
222
223
224
225
226 e1000x_grow_8reg_if_not_full(mac, TORL, data_size + 4);
227 mac[GORCL] = mac[TORL];
228 mac[GORCH] = mac[TORH];
229}
230
231void
232e1000x_increase_size_stats(uint32_t *mac, const int *size_regs, int size)
233{
234 if (size > 1023) {
235 e1000x_inc_reg_if_not_full(mac, size_regs[5]);
236 } else if (size > 511) {
237 e1000x_inc_reg_if_not_full(mac, size_regs[4]);
238 } else if (size > 255) {
239 e1000x_inc_reg_if_not_full(mac, size_regs[3]);
240 } else if (size > 127) {
241 e1000x_inc_reg_if_not_full(mac, size_regs[2]);
242 } else if (size > 64) {
243 e1000x_inc_reg_if_not_full(mac, size_regs[1]);
244 } else if (size == 64) {
245 e1000x_inc_reg_if_not_full(mac, size_regs[0]);
246 }
247}
248
249void
250e1000x_read_tx_ctx_descr(struct e1000_context_desc *d,
251 e1000x_txd_props *props)
252{
253 uint32_t op = le32_to_cpu(d->cmd_and_length);
254
255 props->ipcss = d->lower_setup.ip_fields.ipcss;
256 props->ipcso = d->lower_setup.ip_fields.ipcso;
257 props->ipcse = le16_to_cpu(d->lower_setup.ip_fields.ipcse);
258 props->tucss = d->upper_setup.tcp_fields.tucss;
259 props->tucso = d->upper_setup.tcp_fields.tucso;
260 props->tucse = le16_to_cpu(d->upper_setup.tcp_fields.tucse);
261 props->paylen = op & 0xfffff;
262 props->hdr_len = d->tcp_seg_setup.fields.hdr_len;
263 props->mss = le16_to_cpu(d->tcp_seg_setup.fields.mss);
264 props->ip = (op & E1000_TXD_CMD_IP) ? 1 : 0;
265 props->tcp = (op & E1000_TXD_CMD_TCP) ? 1 : 0;
266 props->tse = (op & E1000_TXD_CMD_TSE) ? 1 : 0;
267}
268
