diff options
Diffstat (limited to 'qemu/hw/net/stellaris_enet.c')
| -rw-r--r-- | qemu/hw/net/stellaris_enet.c | 514 |
1 files changed, 0 insertions, 514 deletions
diff --git a/qemu/hw/net/stellaris_enet.c b/qemu/hw/net/stellaris_enet.c deleted file mode 100644 index 688089494..000000000 --- a/qemu/hw/net/stellaris_enet.c +++ /dev/null @@ -1,514 +0,0 @@ -/* - * Luminary Micro Stellaris Ethernet Controller - * - * Copyright (c) 2007 CodeSourcery. - * Written by Paul Brook - * - * This code is licensed under the GPL. - */ -#include "qemu/osdep.h" -#include "hw/sysbus.h" -#include "net/net.h" -#include <zlib.h> - -//#define DEBUG_STELLARIS_ENET 1 - -#ifdef DEBUG_STELLARIS_ENET -#define DPRINTF(fmt, ...) \ -do { printf("stellaris_enet: " fmt , ## __VA_ARGS__); } while (0) -#define BADF(fmt, ...) \ -do { fprintf(stderr, "stellaris_enet: error: " fmt , ## __VA_ARGS__); exit(1);} while (0) -#else -#define DPRINTF(fmt, ...) do {} while(0) -#define BADF(fmt, ...) \ -do { fprintf(stderr, "stellaris_enet: error: " fmt , ## __VA_ARGS__);} while (0) -#endif - -#define SE_INT_RX 0x01 -#define SE_INT_TXER 0x02 -#define SE_INT_TXEMP 0x04 -#define SE_INT_FOV 0x08 -#define SE_INT_RXER 0x10 -#define SE_INT_MD 0x20 -#define SE_INT_PHY 0x40 - -#define SE_RCTL_RXEN 0x01 -#define SE_RCTL_AMUL 0x02 -#define SE_RCTL_PRMS 0x04 -#define SE_RCTL_BADCRC 0x08 -#define SE_RCTL_RSTFIFO 0x10 - -#define SE_TCTL_TXEN 0x01 -#define SE_TCTL_PADEN 0x02 -#define SE_TCTL_CRC 0x04 -#define SE_TCTL_DUPLEX 0x08 - -#define TYPE_STELLARIS_ENET "stellaris_enet" -#define STELLARIS_ENET(obj) \ - OBJECT_CHECK(stellaris_enet_state, (obj), TYPE_STELLARIS_ENET) - -typedef struct { - uint8_t data[2048]; - uint32_t len; -} StellarisEnetRxFrame; - -typedef struct { - SysBusDevice parent_obj; - - uint32_t ris; - uint32_t im; - uint32_t rctl; - uint32_t tctl; - uint32_t thr; - uint32_t mctl; - uint32_t mdv; - uint32_t mtxd; - uint32_t mrxd; - uint32_t np; - uint32_t tx_fifo_len; - uint8_t tx_fifo[2048]; - /* Real hardware has a 2k fifo, which works out to be at most 31 packets. - We implement a full 31 packet fifo. */ - StellarisEnetRxFrame rx[31]; - uint32_t rx_fifo_offset; - uint32_t next_packet; - NICState *nic; - NICConf conf; - qemu_irq irq; - MemoryRegion mmio; -} stellaris_enet_state; - -static const VMStateDescription vmstate_rx_frame = { - .name = "stellaris_enet/rx_frame", - .version_id = 1, - .minimum_version_id = 1, - .fields = (VMStateField[]) { - VMSTATE_UINT8_ARRAY(data, StellarisEnetRxFrame, 2048), - VMSTATE_UINT32(len, StellarisEnetRxFrame), - VMSTATE_END_OF_LIST() - } -}; - -static int stellaris_enet_post_load(void *opaque, int version_id) -{ - stellaris_enet_state *s = opaque; - int i; - - /* Sanitize inbound state. Note that next_packet is an index but - * np is a size; hence their valid upper bounds differ. - */ - if (s->next_packet >= ARRAY_SIZE(s->rx)) { - return -1; - } - - if (s->np > ARRAY_SIZE(s->rx)) { - return -1; - } - - for (i = 0; i < ARRAY_SIZE(s->rx); i++) { - if (s->rx[i].len > ARRAY_SIZE(s->rx[i].data)) { - return -1; - } - } - - if (s->rx_fifo_offset > ARRAY_SIZE(s->rx[0].data) - 4) { - return -1; - } - - if (s->tx_fifo_len > ARRAY_SIZE(s->tx_fifo)) { - return -1; - } - - return 0; -} - -static const VMStateDescription vmstate_stellaris_enet = { - .name = "stellaris_enet", - .version_id = 2, - .minimum_version_id = 2, - .post_load = stellaris_enet_post_load, - .fields = (VMStateField[]) { - VMSTATE_UINT32(ris, stellaris_enet_state), - VMSTATE_UINT32(im, stellaris_enet_state), - VMSTATE_UINT32(rctl, stellaris_enet_state), - VMSTATE_UINT32(tctl, stellaris_enet_state), - VMSTATE_UINT32(thr, stellaris_enet_state), - VMSTATE_UINT32(mctl, stellaris_enet_state), - VMSTATE_UINT32(mdv, stellaris_enet_state), - VMSTATE_UINT32(mtxd, stellaris_enet_state), - VMSTATE_UINT32(mrxd, stellaris_enet_state), - VMSTATE_UINT32(np, stellaris_enet_state), - VMSTATE_UINT32(tx_fifo_len, stellaris_enet_state), - VMSTATE_UINT8_ARRAY(tx_fifo, stellaris_enet_state, 2048), - VMSTATE_STRUCT_ARRAY(rx, stellaris_enet_state, 31, 1, - vmstate_rx_frame, StellarisEnetRxFrame), - VMSTATE_UINT32(rx_fifo_offset, stellaris_enet_state), - VMSTATE_UINT32(next_packet, stellaris_enet_state), - VMSTATE_END_OF_LIST() - } -}; - -static void stellaris_enet_update(stellaris_enet_state *s) -{ - qemu_set_irq(s->irq, (s->ris & s->im) != 0); -} - -/* Return the data length of the packet currently being assembled - * in the TX fifo. - */ -static inline int stellaris_txpacket_datalen(stellaris_enet_state *s) -{ - return s->tx_fifo[0] | (s->tx_fifo[1] << 8); -} - -/* Return true if the packet currently in the TX FIFO is complete, -* ie the FIFO holds enough bytes for the data length, ethernet header, -* payload and optionally CRC. -*/ -static inline bool stellaris_txpacket_complete(stellaris_enet_state *s) -{ - int framelen = stellaris_txpacket_datalen(s); - framelen += 16; - if (!(s->tctl & SE_TCTL_CRC)) { - framelen += 4; - } - /* Cover the corner case of a 2032 byte payload with auto-CRC disabled: - * this requires more bytes than will fit in the FIFO. It's not totally - * clear how the h/w handles this, but if using threshold-based TX - * it will definitely try to transmit something. - */ - framelen = MIN(framelen, ARRAY_SIZE(s->tx_fifo)); - return s->tx_fifo_len >= framelen; -} - -/* Return true if the TX FIFO threshold is enabled and the FIFO - * has filled enough to reach it. - */ -static inline bool stellaris_tx_thr_reached(stellaris_enet_state *s) -{ - return (s->thr < 0x3f && - (s->tx_fifo_len >= 4 * (s->thr * 8 + 1))); -} - -/* Send the packet currently in the TX FIFO */ -static void stellaris_enet_send(stellaris_enet_state *s) -{ - int framelen = stellaris_txpacket_datalen(s); - - /* Ethernet header is in the FIFO but not in the datacount. - * We don't implement explicit CRC, so just ignore any - * CRC value in the FIFO. - */ - framelen += 14; - if ((s->tctl & SE_TCTL_PADEN) && framelen < 60) { - memset(&s->tx_fifo[framelen + 2], 0, 60 - framelen); - framelen = 60; - } - /* This MIN will have no effect unless the FIFO data is corrupt - * (eg bad data from an incoming migration); otherwise the check - * on the datalen at the start of writing the data into the FIFO - * will have caught this. Silently write a corrupt half-packet, - * which is what the hardware does in FIFO underrun situations. - */ - framelen = MIN(framelen, ARRAY_SIZE(s->tx_fifo) - 2); - qemu_send_packet(qemu_get_queue(s->nic), s->tx_fifo + 2, framelen); - s->tx_fifo_len = 0; - s->ris |= SE_INT_TXEMP; - stellaris_enet_update(s); - DPRINTF("Done TX\n"); -} - -/* TODO: Implement MAC address filtering. */ -static ssize_t stellaris_enet_receive(NetClientState *nc, const uint8_t *buf, size_t size) -{ - stellaris_enet_state *s = qemu_get_nic_opaque(nc); - int n; - uint8_t *p; - uint32_t crc; - - if ((s->rctl & SE_RCTL_RXEN) == 0) - return -1; - if (s->np >= 31) { - return 0; - } - - DPRINTF("Received packet len=%zu\n", size); - n = s->next_packet + s->np; - if (n >= 31) - n -= 31; - - if (size >= sizeof(s->rx[n].data) - 6) { - /* If the packet won't fit into the - * emulated 2K RAM, this is reported - * as a FIFO overrun error. - */ - s->ris |= SE_INT_FOV; - stellaris_enet_update(s); - return -1; - } - - s->np++; - s->rx[n].len = size + 6; - p = s->rx[n].data; - *(p++) = (size + 6); - *(p++) = (size + 6) >> 8; - memcpy (p, buf, size); - p += size; - crc = crc32(~0, buf, size); - *(p++) = crc; - *(p++) = crc >> 8; - *(p++) = crc >> 16; - *(p++) = crc >> 24; - /* Clear the remaining bytes in the last word. */ - if ((size & 3) != 2) { - memset(p, 0, (6 - size) & 3); - } - - s->ris |= SE_INT_RX; - stellaris_enet_update(s); - - return size; -} - -static int stellaris_enet_can_receive(stellaris_enet_state *s) -{ - return (s->np < 31); -} - -static uint64_t stellaris_enet_read(void *opaque, hwaddr offset, - unsigned size) -{ - stellaris_enet_state *s = (stellaris_enet_state *)opaque; - uint32_t val; - - switch (offset) { - case 0x00: /* RIS */ - DPRINTF("IRQ status %02x\n", s->ris); - return s->ris; - case 0x04: /* IM */ - return s->im; - case 0x08: /* RCTL */ - return s->rctl; - case 0x0c: /* TCTL */ - return s->tctl; - case 0x10: /* DATA */ - { - uint8_t *rx_fifo; - - if (s->np == 0) { - BADF("RX underflow\n"); - return 0; - } - - rx_fifo = s->rx[s->next_packet].data + s->rx_fifo_offset; - - val = rx_fifo[0] | (rx_fifo[1] << 8) | (rx_fifo[2] << 16) - | (rx_fifo[3] << 24); - s->rx_fifo_offset += 4; - if (s->rx_fifo_offset >= s->rx[s->next_packet].len) { - s->rx_fifo_offset = 0; - s->next_packet++; - if (s->next_packet >= 31) - s->next_packet = 0; - s->np--; - DPRINTF("RX done np=%d\n", s->np); - if (!s->np && stellaris_enet_can_receive(s)) { - qemu_flush_queued_packets(qemu_get_queue(s->nic)); - } - } - return val; - } - case 0x14: /* IA0 */ - return s->conf.macaddr.a[0] | (s->conf.macaddr.a[1] << 8) - | (s->conf.macaddr.a[2] << 16) - | ((uint32_t)s->conf.macaddr.a[3] << 24); - case 0x18: /* IA1 */ - return s->conf.macaddr.a[4] | (s->conf.macaddr.a[5] << 8); - case 0x1c: /* THR */ - return s->thr; - case 0x20: /* MCTL */ - return s->mctl; - case 0x24: /* MDV */ - return s->mdv; - case 0x28: /* MADD */ - return 0; - case 0x2c: /* MTXD */ - return s->mtxd; - case 0x30: /* MRXD */ - return s->mrxd; - case 0x34: /* NP */ - return s->np; - case 0x38: /* TR */ - return 0; - case 0x3c: /* Undocuented: Timestamp? */ - return 0; - default: - hw_error("stellaris_enet_read: Bad offset %x\n", (int)offset); - return 0; - } -} - -static void stellaris_enet_write(void *opaque, hwaddr offset, - uint64_t value, unsigned size) -{ - stellaris_enet_state *s = (stellaris_enet_state *)opaque; - - switch (offset) { - case 0x00: /* IACK */ - s->ris &= ~value; - DPRINTF("IRQ ack %02" PRIx64 "/%02x\n", value, s->ris); - stellaris_enet_update(s); - /* Clearing TXER also resets the TX fifo. */ - if (value & SE_INT_TXER) { - s->tx_fifo_len = 0; - } - break; - case 0x04: /* IM */ - DPRINTF("IRQ mask %02" PRIx64 "/%02x\n", value, s->ris); - s->im = value; - stellaris_enet_update(s); - break; - case 0x08: /* RCTL */ - s->rctl = value; - if (value & SE_RCTL_RSTFIFO) { - s->np = 0; - s->rx_fifo_offset = 0; - stellaris_enet_update(s); - } - break; - case 0x0c: /* TCTL */ - s->tctl = value; - break; - case 0x10: /* DATA */ - if (s->tx_fifo_len == 0) { - /* The first word is special, it contains the data length */ - int framelen = value & 0xffff; - if (framelen > 2032) { - DPRINTF("TX frame too long (%d)\n", framelen); - s->ris |= SE_INT_TXER; - stellaris_enet_update(s); - break; - } - } - - if (s->tx_fifo_len + 4 <= ARRAY_SIZE(s->tx_fifo)) { - s->tx_fifo[s->tx_fifo_len++] = value; - s->tx_fifo[s->tx_fifo_len++] = value >> 8; - s->tx_fifo[s->tx_fifo_len++] = value >> 16; - s->tx_fifo[s->tx_fifo_len++] = value >> 24; - } - - if (stellaris_tx_thr_reached(s) && stellaris_txpacket_complete(s)) { - stellaris_enet_send(s); - } - break; - case 0x14: /* IA0 */ - s->conf.macaddr.a[0] = value; - s->conf.macaddr.a[1] = value >> 8; - s->conf.macaddr.a[2] = value >> 16; - s->conf.macaddr.a[3] = value >> 24; - break; - case 0x18: /* IA1 */ - s->conf.macaddr.a[4] = value; - s->conf.macaddr.a[5] = value >> 8; - break; - case 0x1c: /* THR */ - s->thr = value; - break; - case 0x20: /* MCTL */ - s->mctl = value; - break; - case 0x24: /* MDV */ - s->mdv = value; - break; - case 0x28: /* MADD */ - /* ignored. */ - break; - case 0x2c: /* MTXD */ - s->mtxd = value & 0xff; - break; - case 0x38: /* TR */ - if (value & 1) { - stellaris_enet_send(s); - } - break; - case 0x30: /* MRXD */ - case 0x34: /* NP */ - /* Ignored. */ - case 0x3c: /* Undocuented: Timestamp? */ - /* Ignored. */ - break; - default: - hw_error("stellaris_enet_write: Bad offset %x\n", (int)offset); - } -} - -static const MemoryRegionOps stellaris_enet_ops = { - .read = stellaris_enet_read, - .write = stellaris_enet_write, - .endianness = DEVICE_NATIVE_ENDIAN, -}; - -static void stellaris_enet_reset(stellaris_enet_state *s) -{ - s->mdv = 0x80; - s->rctl = SE_RCTL_BADCRC; - s->im = SE_INT_PHY | SE_INT_MD | SE_INT_RXER | SE_INT_FOV | SE_INT_TXEMP - | SE_INT_TXER | SE_INT_RX; - s->thr = 0x3f; - s->tx_fifo_len = 0; -} - -static NetClientInfo net_stellaris_enet_info = { - .type = NET_CLIENT_OPTIONS_KIND_NIC, - .size = sizeof(NICState), - .receive = stellaris_enet_receive, -}; - -static int stellaris_enet_init(SysBusDevice *sbd) -{ - DeviceState *dev = DEVICE(sbd); - stellaris_enet_state *s = STELLARIS_ENET(dev); - - memory_region_init_io(&s->mmio, OBJECT(s), &stellaris_enet_ops, s, - "stellaris_enet", 0x1000); - sysbus_init_mmio(sbd, &s->mmio); - sysbus_init_irq(sbd, &s->irq); - qemu_macaddr_default_if_unset(&s->conf.macaddr); - - s->nic = qemu_new_nic(&net_stellaris_enet_info, &s->conf, - object_get_typename(OBJECT(dev)), dev->id, s); - qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a); - - stellaris_enet_reset(s); - return 0; -} - -static Property stellaris_enet_properties[] = { - DEFINE_NIC_PROPERTIES(stellaris_enet_state, conf), - DEFINE_PROP_END_OF_LIST(), -}; - -static void stellaris_enet_class_init(ObjectClass *klass, void *data) -{ - DeviceClass *dc = DEVICE_CLASS(klass); - SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); - - k->init = stellaris_enet_init; - dc->props = stellaris_enet_properties; - dc->vmsd = &vmstate_stellaris_enet; -} - -static const TypeInfo stellaris_enet_info = { - .name = TYPE_STELLARIS_ENET, - .parent = TYPE_SYS_BUS_DEVICE, - .instance_size = sizeof(stellaris_enet_state), - .class_init = stellaris_enet_class_init, -}; - -static void stellaris_enet_register_types(void) -{ - type_register_static(&stellaris_enet_info); -} - -type_init(stellaris_enet_register_types) |