2 * QEMU NE2000 emulation
4 * Copyright (c) 2003-2004 Fabrice Bellard
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
25 #include "hw/pci/pci.h"
28 #include "hw/loader.h"
29 #include "sysemu/sysemu.h"
31 /* debug NE2000 card */
32 //#define DEBUG_NE2000
34 #define MAX_ETH_FRAME_SIZE 1514
36 #define E8390_CMD 0x00 /* The command register (for all pages) */
37 /* Page 0 register offsets. */
38 #define EN0_CLDALO 0x01 /* Low byte of current local dma addr RD */
39 #define EN0_STARTPG 0x01 /* Starting page of ring bfr WR */
40 #define EN0_CLDAHI 0x02 /* High byte of current local dma addr RD */
41 #define EN0_STOPPG 0x02 /* Ending page +1 of ring bfr WR */
42 #define EN0_BOUNDARY 0x03 /* Boundary page of ring bfr RD WR */
43 #define EN0_TSR 0x04 /* Transmit status reg RD */
44 #define EN0_TPSR 0x04 /* Transmit starting page WR */
45 #define EN0_NCR 0x05 /* Number of collision reg RD */
46 #define EN0_TCNTLO 0x05 /* Low byte of tx byte count WR */
47 #define EN0_FIFO 0x06 /* FIFO RD */
48 #define EN0_TCNTHI 0x06 /* High byte of tx byte count WR */
49 #define EN0_ISR 0x07 /* Interrupt status reg RD WR */
50 #define EN0_CRDALO 0x08 /* low byte of current remote dma address RD */
51 #define EN0_RSARLO 0x08 /* Remote start address reg 0 */
52 #define EN0_CRDAHI 0x09 /* high byte, current remote dma address RD */
53 #define EN0_RSARHI 0x09 /* Remote start address reg 1 */
54 #define EN0_RCNTLO 0x0a /* Remote byte count reg WR */
55 #define EN0_RTL8029ID0 0x0a /* Realtek ID byte #1 RD */
56 #define EN0_RCNTHI 0x0b /* Remote byte count reg WR */
57 #define EN0_RTL8029ID1 0x0b /* Realtek ID byte #2 RD */
58 #define EN0_RSR 0x0c /* rx status reg RD */
59 #define EN0_RXCR 0x0c /* RX configuration reg WR */
60 #define EN0_TXCR 0x0d /* TX configuration reg WR */
61 #define EN0_COUNTER0 0x0d /* Rcv alignment error counter RD */
62 #define EN0_DCFG 0x0e /* Data configuration reg WR */
63 #define EN0_COUNTER1 0x0e /* Rcv CRC error counter RD */
64 #define EN0_IMR 0x0f /* Interrupt mask reg WR */
65 #define EN0_COUNTER2 0x0f /* Rcv missed frame error counter RD */
68 #define EN1_CURPAG 0x17
71 #define EN2_STARTPG 0x21 /* Starting page of ring bfr RD */
72 #define EN2_STOPPG 0x22 /* Ending page +1 of ring bfr RD */
74 #define EN3_CONFIG0 0x33
75 #define EN3_CONFIG1 0x34
76 #define EN3_CONFIG2 0x35
77 #define EN3_CONFIG3 0x36
79 /* Register accessed at EN_CMD, the 8390 base addr. */
80 #define E8390_STOP 0x01 /* Stop and reset the chip */
81 #define E8390_START 0x02 /* Start the chip, clear reset */
82 #define E8390_TRANS 0x04 /* Transmit a frame */
83 #define E8390_RREAD 0x08 /* Remote read */
84 #define E8390_RWRITE 0x10 /* Remote write */
85 #define E8390_NODMA 0x20 /* Remote DMA */
86 #define E8390_PAGE0 0x00 /* Select page chip registers */
87 #define E8390_PAGE1 0x40 /* using the two high-order bits */
88 #define E8390_PAGE2 0x80 /* Page 3 is invalid. */
90 /* Bits in EN0_ISR - Interrupt status register */
91 #define ENISR_RX 0x01 /* Receiver, no error */
92 #define ENISR_TX 0x02 /* Transmitter, no error */
93 #define ENISR_RX_ERR 0x04 /* Receiver, with error */
94 #define ENISR_TX_ERR 0x08 /* Transmitter, with error */
95 #define ENISR_OVER 0x10 /* Receiver overwrote the ring */
96 #define ENISR_COUNTERS 0x20 /* Counters need emptying */
97 #define ENISR_RDC 0x40 /* remote dma complete */
98 #define ENISR_RESET 0x80 /* Reset completed */
99 #define ENISR_ALL 0x3f /* Interrupts we will enable */
101 /* Bits in received packet status byte and EN0_RSR*/
102 #define ENRSR_RXOK 0x01 /* Received a good packet */
103 #define ENRSR_CRC 0x02 /* CRC error */
104 #define ENRSR_FAE 0x04 /* frame alignment error */
105 #define ENRSR_FO 0x08 /* FIFO overrun */
106 #define ENRSR_MPA 0x10 /* missed pkt */
107 #define ENRSR_PHY 0x20 /* physical/multicast address */
108 #define ENRSR_DIS 0x40 /* receiver disable. set in monitor mode */
109 #define ENRSR_DEF 0x80 /* deferring */
111 /* Transmitted packet status, EN0_TSR. */
112 #define ENTSR_PTX 0x01 /* Packet transmitted without error */
113 #define ENTSR_ND 0x02 /* The transmit wasn't deferred. */
114 #define ENTSR_COL 0x04 /* The transmit collided at least once. */
115 #define ENTSR_ABT 0x08 /* The transmit collided 16 times, and was deferred. */
116 #define ENTSR_CRS 0x10 /* The carrier sense was lost. */
117 #define ENTSR_FU 0x20 /* A "FIFO underrun" occurred during transmit. */
118 #define ENTSR_CDH 0x40 /* The collision detect "heartbeat" signal was lost. */
119 #define ENTSR_OWC 0x80 /* There was an out-of-window collision. */
121 typedef struct PCINE2000State {
126 void ne2000_reset(NE2000State *s)
130 s->isr = ENISR_RESET;
131 memcpy(s->mem, &s->c.macaddr, 6);
135 /* duplicate prom data */
136 for(i = 15;i >= 0; i--) {
137 s->mem[2 * i] = s->mem[i];
138 s->mem[2 * i + 1] = s->mem[i];
142 static void ne2000_update_irq(NE2000State *s)
145 isr = (s->isr & s->imr) & 0x7f;
146 #if defined(DEBUG_NE2000)
147 printf("NE2000: Set IRQ to %d (%02x %02x)\n",
148 isr ? 1 : 0, s->isr, s->imr);
150 qemu_set_irq(s->irq, (isr != 0));
153 static int ne2000_buffer_full(NE2000State *s)
155 int avail, index, boundary;
157 index = s->curpag << 8;
158 boundary = s->boundary << 8;
159 if (index < boundary)
160 avail = boundary - index;
162 avail = (s->stop - s->start) - (index - boundary);
163 if (avail < (MAX_ETH_FRAME_SIZE + 4))
168 #define MIN_BUF_SIZE 60
170 ssize_t ne2000_receive(NetClientState *nc, const uint8_t *buf, size_t size_)
172 NE2000State *s = qemu_get_nic_opaque(nc);
175 unsigned int total_len, next, avail, len, index, mcast_idx;
177 static const uint8_t broadcast_macaddr[6] =
178 { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
180 #if defined(DEBUG_NE2000)
181 printf("NE2000: received len=%d\n", size);
184 if (s->cmd & E8390_STOP || ne2000_buffer_full(s))
187 /* XXX: check this */
188 if (s->rxcr & 0x10) {
189 /* promiscuous: receive all */
191 if (!memcmp(buf, broadcast_macaddr, 6)) {
192 /* broadcast address */
193 if (!(s->rxcr & 0x04))
195 } else if (buf[0] & 0x01) {
197 if (!(s->rxcr & 0x08))
199 mcast_idx = compute_mcast_idx(buf);
200 if (!(s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7))))
202 } else if (s->mem[0] == buf[0] &&
203 s->mem[2] == buf[1] &&
204 s->mem[4] == buf[2] &&
205 s->mem[6] == buf[3] &&
206 s->mem[8] == buf[4] &&
207 s->mem[10] == buf[5]) {
215 /* if too small buffer, then expand it */
216 if (size < MIN_BUF_SIZE) {
217 memcpy(buf1, buf, size);
218 memset(buf1 + size, 0, MIN_BUF_SIZE - size);
223 index = s->curpag << 8;
224 if (index >= NE2000_PMEM_END) {
227 /* 4 bytes for header */
228 total_len = size + 4;
229 /* address for next packet (4 bytes for CRC) */
230 next = index + ((total_len + 4 + 255) & ~0xff);
232 next -= (s->stop - s->start);
233 /* prepare packet header */
235 s->rsr = ENRSR_RXOK; /* receive status */
236 /* XXX: check this */
242 p[3] = total_len >> 8;
245 /* write packet data */
247 if (index <= s->stop)
248 avail = s->stop - index;
254 memcpy(s->mem + index, buf, len);
257 if (index == s->stop)
261 s->curpag = next >> 8;
263 /* now we can signal we have received something */
265 ne2000_update_irq(s);
270 static void ne2000_ioport_write(void *opaque, uint32_t addr, uint32_t val)
272 NE2000State *s = opaque;
273 int offset, page, index;
277 printf("NE2000: write addr=0x%x val=0x%02x\n", addr, val);
279 if (addr == E8390_CMD) {
280 /* control register */
282 if (!(val & E8390_STOP)) { /* START bit makes no sense on RTL8029... */
283 s->isr &= ~ENISR_RESET;
284 /* test specific case: zero length transfer */
285 if ((val & (E8390_RREAD | E8390_RWRITE)) &&
288 ne2000_update_irq(s);
290 if (val & E8390_TRANS) {
291 index = (s->tpsr << 8);
292 /* XXX: next 2 lines are a hack to make netware 3.11 work */
293 if (index >= NE2000_PMEM_END)
294 index -= NE2000_PMEM_SIZE;
295 /* fail safe: check range on the transmitted length */
296 if (index + s->tcnt <= NE2000_PMEM_END) {
297 qemu_send_packet(qemu_get_queue(s->nic), s->mem + index,
300 /* signal end of transfer */
303 s->cmd &= ~E8390_TRANS;
304 ne2000_update_irq(s);
309 offset = addr | (page << 4);
312 if (val << 8 <= NE2000_PMEM_END) {
317 if (val << 8 <= NE2000_PMEM_END) {
322 if (val << 8 < NE2000_PMEM_END) {
328 ne2000_update_irq(s);
334 s->tcnt = (s->tcnt & 0xff00) | val;
337 s->tcnt = (s->tcnt & 0x00ff) | (val << 8);
340 s->rsar = (s->rsar & 0xff00) | val;
343 s->rsar = (s->rsar & 0x00ff) | (val << 8);
346 s->rcnt = (s->rcnt & 0xff00) | val;
349 s->rcnt = (s->rcnt & 0x00ff) | (val << 8);
358 s->isr &= ~(val & 0x7f);
359 ne2000_update_irq(s);
361 case EN1_PHYS ... EN1_PHYS + 5:
362 s->phys[offset - EN1_PHYS] = val;
365 if (val << 8 < NE2000_PMEM_END) {
369 case EN1_MULT ... EN1_MULT + 7:
370 s->mult[offset - EN1_MULT] = val;
376 static uint32_t ne2000_ioport_read(void *opaque, uint32_t addr)
378 NE2000State *s = opaque;
379 int offset, page, ret;
382 if (addr == E8390_CMD) {
386 offset = addr | (page << 4);
398 ret = s->rsar & 0x00ff;
403 case EN1_PHYS ... EN1_PHYS + 5:
404 ret = s->phys[offset - EN1_PHYS];
409 case EN1_MULT ... EN1_MULT + 7:
410 ret = s->mult[offset - EN1_MULT];
428 ret = 0; /* 10baseT media */
431 ret = 0x40; /* 10baseT active */
434 ret = 0x40; /* Full duplex */
442 printf("NE2000: read addr=0x%x val=%02x\n", addr, ret);
447 static inline void ne2000_mem_writeb(NE2000State *s, uint32_t addr,
451 (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
456 static inline void ne2000_mem_writew(NE2000State *s, uint32_t addr,
459 addr &= ~1; /* XXX: check exact behaviour if not even */
461 (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
462 *(uint16_t *)(s->mem + addr) = cpu_to_le16(val);
466 static inline void ne2000_mem_writel(NE2000State *s, uint32_t addr,
469 addr &= ~1; /* XXX: check exact behaviour if not even */
471 (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
472 stl_le_p(s->mem + addr, val);
476 static inline uint32_t ne2000_mem_readb(NE2000State *s, uint32_t addr)
479 (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
486 static inline uint32_t ne2000_mem_readw(NE2000State *s, uint32_t addr)
488 addr &= ~1; /* XXX: check exact behaviour if not even */
490 (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
491 return le16_to_cpu(*(uint16_t *)(s->mem + addr));
497 static inline uint32_t ne2000_mem_readl(NE2000State *s, uint32_t addr)
499 addr &= ~1; /* XXX: check exact behaviour if not even */
501 (addr >= NE2000_PMEM_START && addr < NE2000_MEM_SIZE)) {
502 return ldl_le_p(s->mem + addr);
508 static inline void ne2000_dma_update(NE2000State *s, int len)
512 /* XXX: check what to do if rsar > stop */
513 if (s->rsar == s->stop)
516 if (s->rcnt <= len) {
518 /* signal end of transfer */
520 ne2000_update_irq(s);
526 static void ne2000_asic_ioport_write(void *opaque, uint32_t addr, uint32_t val)
528 NE2000State *s = opaque;
531 printf("NE2000: asic write val=0x%04x\n", val);
535 if (s->dcfg & 0x01) {
537 ne2000_mem_writew(s, s->rsar, val);
538 ne2000_dma_update(s, 2);
541 ne2000_mem_writeb(s, s->rsar, val);
542 ne2000_dma_update(s, 1);
546 static uint32_t ne2000_asic_ioport_read(void *opaque, uint32_t addr)
548 NE2000State *s = opaque;
551 if (s->dcfg & 0x01) {
553 ret = ne2000_mem_readw(s, s->rsar);
554 ne2000_dma_update(s, 2);
557 ret = ne2000_mem_readb(s, s->rsar);
558 ne2000_dma_update(s, 1);
561 printf("NE2000: asic read val=0x%04x\n", ret);
566 static void ne2000_asic_ioport_writel(void *opaque, uint32_t addr, uint32_t val)
568 NE2000State *s = opaque;
571 printf("NE2000: asic writel val=0x%04x\n", val);
576 ne2000_mem_writel(s, s->rsar, val);
577 ne2000_dma_update(s, 4);
580 static uint32_t ne2000_asic_ioport_readl(void *opaque, uint32_t addr)
582 NE2000State *s = opaque;
586 ret = ne2000_mem_readl(s, s->rsar);
587 ne2000_dma_update(s, 4);
589 printf("NE2000: asic readl val=0x%04x\n", ret);
594 static void ne2000_reset_ioport_write(void *opaque, uint32_t addr, uint32_t val)
596 /* nothing to do (end of reset pulse) */
599 static uint32_t ne2000_reset_ioport_read(void *opaque, uint32_t addr)
601 NE2000State *s = opaque;
606 static int ne2000_post_load(void* opaque, int version_id)
608 NE2000State* s = opaque;
610 if (version_id < 2) {
616 const VMStateDescription vmstate_ne2000 = {
619 .minimum_version_id = 0,
620 .post_load = ne2000_post_load,
621 .fields = (VMStateField[]) {
622 VMSTATE_UINT8_V(rxcr, NE2000State, 2),
623 VMSTATE_UINT8(cmd, NE2000State),
624 VMSTATE_UINT32(start, NE2000State),
625 VMSTATE_UINT32(stop, NE2000State),
626 VMSTATE_UINT8(boundary, NE2000State),
627 VMSTATE_UINT8(tsr, NE2000State),
628 VMSTATE_UINT8(tpsr, NE2000State),
629 VMSTATE_UINT16(tcnt, NE2000State),
630 VMSTATE_UINT16(rcnt, NE2000State),
631 VMSTATE_UINT32(rsar, NE2000State),
632 VMSTATE_UINT8(rsr, NE2000State),
633 VMSTATE_UINT8(isr, NE2000State),
634 VMSTATE_UINT8(dcfg, NE2000State),
635 VMSTATE_UINT8(imr, NE2000State),
636 VMSTATE_BUFFER(phys, NE2000State),
637 VMSTATE_UINT8(curpag, NE2000State),
638 VMSTATE_BUFFER(mult, NE2000State),
639 VMSTATE_UNUSED(4), /* was irq */
640 VMSTATE_BUFFER(mem, NE2000State),
641 VMSTATE_END_OF_LIST()
645 static const VMStateDescription vmstate_pci_ne2000 = {
648 .minimum_version_id = 3,
649 .fields = (VMStateField[]) {
650 VMSTATE_PCI_DEVICE(dev, PCINE2000State),
651 VMSTATE_STRUCT(ne2000, PCINE2000State, 0, vmstate_ne2000, NE2000State),
652 VMSTATE_END_OF_LIST()
656 static uint64_t ne2000_read(void *opaque, hwaddr addr,
659 NE2000State *s = opaque;
661 if (addr < 0x10 && size == 1) {
662 return ne2000_ioport_read(s, addr);
663 } else if (addr == 0x10) {
665 return ne2000_asic_ioport_read(s, addr);
667 return ne2000_asic_ioport_readl(s, addr);
669 } else if (addr == 0x1f && size == 1) {
670 return ne2000_reset_ioport_read(s, addr);
672 return ((uint64_t)1 << (size * 8)) - 1;
675 static void ne2000_write(void *opaque, hwaddr addr,
676 uint64_t data, unsigned size)
678 NE2000State *s = opaque;
680 if (addr < 0x10 && size == 1) {
681 ne2000_ioport_write(s, addr, data);
682 } else if (addr == 0x10) {
684 ne2000_asic_ioport_write(s, addr, data);
686 ne2000_asic_ioport_writel(s, addr, data);
688 } else if (addr == 0x1f && size == 1) {
689 ne2000_reset_ioport_write(s, addr, data);
693 static const MemoryRegionOps ne2000_ops = {
695 .write = ne2000_write,
696 .endianness = DEVICE_LITTLE_ENDIAN,
699 /***********************************************************/
700 /* PCI NE2000 definitions */
702 void ne2000_setup_io(NE2000State *s, DeviceState *dev, unsigned size)
704 memory_region_init_io(&s->io, OBJECT(dev), &ne2000_ops, s, "ne2000", size);
707 static NetClientInfo net_ne2000_info = {
708 .type = NET_CLIENT_OPTIONS_KIND_NIC,
709 .size = sizeof(NICState),
710 .receive = ne2000_receive,
713 static void pci_ne2000_realize(PCIDevice *pci_dev, Error **errp)
715 PCINE2000State *d = DO_UPCAST(PCINE2000State, dev, pci_dev);
719 pci_conf = d->dev.config;
720 pci_conf[PCI_INTERRUPT_PIN] = 1; /* interrupt pin A */
723 ne2000_setup_io(s, DEVICE(pci_dev), 0x100);
724 pci_register_bar(&d->dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io);
725 s->irq = pci_allocate_irq(&d->dev);
727 qemu_macaddr_default_if_unset(&s->c.macaddr);
730 s->nic = qemu_new_nic(&net_ne2000_info, &s->c,
731 object_get_typename(OBJECT(pci_dev)), pci_dev->qdev.id, s);
732 qemu_format_nic_info_str(qemu_get_queue(s->nic), s->c.macaddr.a);
735 static void pci_ne2000_exit(PCIDevice *pci_dev)
737 PCINE2000State *d = DO_UPCAST(PCINE2000State, dev, pci_dev);
738 NE2000State *s = &d->ne2000;
740 qemu_del_nic(s->nic);
741 qemu_free_irq(s->irq);
744 static void ne2000_instance_init(Object *obj)
746 PCIDevice *pci_dev = PCI_DEVICE(obj);
747 PCINE2000State *d = DO_UPCAST(PCINE2000State, dev, pci_dev);
748 NE2000State *s = &d->ne2000;
750 device_add_bootindex_property(obj, &s->c.bootindex,
751 "bootindex", "/ethernet-phy@0",
752 &pci_dev->qdev, NULL);
755 static Property ne2000_properties[] = {
756 DEFINE_NIC_PROPERTIES(PCINE2000State, ne2000.c),
757 DEFINE_PROP_END_OF_LIST(),
760 static void ne2000_class_init(ObjectClass *klass, void *data)
762 DeviceClass *dc = DEVICE_CLASS(klass);
763 PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
765 k->realize = pci_ne2000_realize;
766 k->exit = pci_ne2000_exit;
767 k->romfile = "efi-ne2k_pci.rom",
768 k->vendor_id = PCI_VENDOR_ID_REALTEK;
769 k->device_id = PCI_DEVICE_ID_REALTEK_8029;
770 k->class_id = PCI_CLASS_NETWORK_ETHERNET;
771 dc->vmsd = &vmstate_pci_ne2000;
772 dc->props = ne2000_properties;
773 set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
776 static const TypeInfo ne2000_info = {
778 .parent = TYPE_PCI_DEVICE,
779 .instance_size = sizeof(PCINE2000State),
780 .class_init = ne2000_class_init,
781 .instance_init = ne2000_instance_init,
784 static void ne2000_register_types(void)
786 type_register_static(&ne2000_info);
789 type_init(ne2000_register_types)