Adding qemu as a submodule of KVMFORNFV

This Patch includes the changes to add qemu as a submodule to
kvmfornfv repo and make use of the updated latest qemu for the
execution of all testcase
Change-Id: I1280af507a857675c7f81d30c95255635667bdd7
Signed-off-by:RajithaY<rajithax.yerrumsetty@intel.com>

1 files changed, 0 insertions, 654 deletions

diff --git a/qemu/hw/net/fsl_etsec/rings.c b/qemu/hw/net/fsl_etsec/rings.c
deleted file mode 100644
index ed1de7da9..000000000
--- a/qemu/hw/net/fsl_etsec/rings.c
+++ /dev/null
@@ -1,654 +0,0 @@
-/*
- * QEMU Freescale eTSEC Emulator
- *
- * Copyright (c) 2011-2013 AdaCore
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-#include "qemu/osdep.h"
-#include "net/checksum.h"
-
-#include "etsec.h"
-#include "registers.h"
-
-/* #define ETSEC_RING_DEBUG */
-/* #define HEX_DUMP */
-/* #define DEBUG_BD */
-
-#ifdef ETSEC_RING_DEBUG
-static const int debug_etsec = 1;
-#else
-static const int debug_etsec;
-#endif
-
-#define RING_DEBUG(fmt, ...) do {              \
- if (debug_etsec) {                            \
-        qemu_log(fmt , ## __VA_ARGS__);        \
-    }                                          \
-    } while (0)
-
-#ifdef DEBUG_BD
-
-static void print_tx_bd_flags(uint16_t flags)
-{
-    qemu_log("      Ready: %d\n", !!(flags & BD_TX_READY));
-    qemu_log("      PAD/CRC: %d\n", !!(flags & BD_TX_PADCRC));
-    qemu_log("      Wrap: %d\n", !!(flags & BD_WRAP));
-    qemu_log("      Interrupt: %d\n", !!(flags & BD_INTERRUPT));
-    qemu_log("      Last in frame: %d\n", !!(flags & BD_LAST));
-    qemu_log("      Tx CRC: %d\n", !!(flags & BD_TX_TC));
-    qemu_log("      User-defined preamble / defer: %d\n",
-           !!(flags & BD_TX_PREDEF));
-    qemu_log("      Huge frame enable / Late collision: %d\n",
-           !!(flags & BD_TX_HFELC));
-    qemu_log("      Control frame / Retransmission Limit: %d\n",
-           !!(flags & BD_TX_CFRL));
-    qemu_log("      Retry count: %d\n",
-           (flags >> BD_TX_RC_OFFSET) & BD_TX_RC_MASK);
-    qemu_log("      Underrun / TCP/IP off-load enable: %d\n",
-           !!(flags & BD_TX_TOEUN));
-    qemu_log("      Truncation: %d\n", !!(flags & BD_TX_TR));
-}
-
-static void print_rx_bd_flags(uint16_t flags)
-{
-    qemu_log("      Empty: %d\n", !!(flags & BD_RX_EMPTY));
-    qemu_log("      Receive software ownership: %d\n", !!(flags & BD_RX_RO1));
-    qemu_log("      Wrap: %d\n", !!(flags & BD_WRAP));
-    qemu_log("      Interrupt: %d\n", !!(flags & BD_INTERRUPT));
-    qemu_log("      Last in frame: %d\n", !!(flags & BD_LAST));
-    qemu_log("      First in frame: %d\n", !!(flags & BD_RX_FIRST));
-    qemu_log("      Miss: %d\n", !!(flags & BD_RX_MISS));
-    qemu_log("      Broadcast: %d\n", !!(flags & BD_RX_BROADCAST));
-    qemu_log("      Multicast: %d\n", !!(flags & BD_RX_MULTICAST));
-    qemu_log("      Rx frame length violation: %d\n", !!(flags & BD_RX_LG));
-    qemu_log("      Rx non-octet aligned frame: %d\n", !!(flags & BD_RX_NO));
-    qemu_log("      Short frame: %d\n", !!(flags & BD_RX_SH));
-    qemu_log("      Rx CRC Error: %d\n", !!(flags & BD_RX_CR));
-    qemu_log("      Overrun: %d\n", !!(flags & BD_RX_OV));
-    qemu_log("      Truncation: %d\n", !!(flags & BD_RX_TR));
-}
-
-
-static void print_bd(eTSEC_rxtx_bd bd, int mode, uint32_t index)
-{
-    qemu_log("eTSEC %s Data Buffer Descriptor (%u)\n",
-           mode == eTSEC_TRANSMIT ? "Transmit" : "Receive",
-           index);
-    qemu_log("   Flags   : 0x%04x\n", bd.flags);
-    if (mode == eTSEC_TRANSMIT) {
-        print_tx_bd_flags(bd.flags);
-    } else {
-        print_rx_bd_flags(bd.flags);
-    }
-    qemu_log("   Length  : 0x%04x\n", bd.length);
-    qemu_log("   Pointer : 0x%08x\n", bd.bufptr);
-}
-
-#endif  /* DEBUG_BD */
-
-static void read_buffer_descriptor(eTSEC         *etsec,
-                                   hwaddr         addr,
-                                   eTSEC_rxtx_bd *bd)
-{
-    assert(bd != NULL);
-
-    RING_DEBUG("READ Buffer Descriptor @ 0x" TARGET_FMT_plx"\n", addr);
-    cpu_physical_memory_read(addr,
-                             bd,
-                             sizeof(eTSEC_rxtx_bd));
-
-    if (etsec->regs[DMACTRL].value & DMACTRL_LE) {
-        bd->flags  = lduw_le_p(&bd->flags);
-        bd->length = lduw_le_p(&bd->length);
-        bd->bufptr = ldl_le_p(&bd->bufptr);
-    } else {
-        bd->flags  = lduw_be_p(&bd->flags);
-        bd->length = lduw_be_p(&bd->length);
-        bd->bufptr = ldl_be_p(&bd->bufptr);
-    }
-}
-
-static void write_buffer_descriptor(eTSEC         *etsec,
-                                    hwaddr         addr,
-                                    eTSEC_rxtx_bd *bd)
-{
-    assert(bd != NULL);
-
-    if (etsec->regs[DMACTRL].value & DMACTRL_LE) {
-        stw_le_p(&bd->flags, bd->flags);
-        stw_le_p(&bd->length, bd->length);
-        stl_le_p(&bd->bufptr, bd->bufptr);
-    } else {
-        stw_be_p(&bd->flags, bd->flags);
-        stw_be_p(&bd->length, bd->length);
-        stl_be_p(&bd->bufptr, bd->bufptr);
-    }
-
-    RING_DEBUG("Write Buffer Descriptor @ 0x" TARGET_FMT_plx"\n", addr);
-    cpu_physical_memory_write(addr,
-                              bd,
-                              sizeof(eTSEC_rxtx_bd));
-}
-
-static void ievent_set(eTSEC    *etsec,
-                       uint32_t  flags)
-{
-    etsec->regs[IEVENT].value |= flags;
-
-    if ((flags & IEVENT_TXB && etsec->regs[IMASK].value & IMASK_TXBEN)
-        || (flags & IEVENT_TXF && etsec->regs[IMASK].value & IMASK_TXFEN)) {
-        qemu_irq_raise(etsec->tx_irq);
-        RING_DEBUG("%s Raise Tx IRQ\n", __func__);
-    }
-
-    if ((flags & IEVENT_RXB && etsec->regs[IMASK].value & IMASK_RXBEN)
-        || (flags & IEVENT_RXF && etsec->regs[IMASK].value & IMASK_RXFEN)) {
-        qemu_irq_raise(etsec->rx_irq);
-        RING_DEBUG("%s Raise Rx IRQ\n", __func__);
-    }
-}
-
-static void tx_padding_and_crc(eTSEC *etsec, uint32_t min_frame_len)
-{
-    int add = min_frame_len - etsec->tx_buffer_len;
-
-    /* Padding */
-    if (add > 0) {
-        RING_DEBUG("pad:%u\n", add);
-        etsec->tx_buffer = g_realloc(etsec->tx_buffer,
-                                        etsec->tx_buffer_len + add);
-
-        memset(etsec->tx_buffer + etsec->tx_buffer_len, 0x0, add);
-        etsec->tx_buffer_len += add;
-    }
-
-    /* Never add CRC in QEMU */
-}
-
-static void process_tx_fcb(eTSEC *etsec)
-{
-    uint8_t flags = (uint8_t)(*etsec->tx_buffer);
-    /* L3 header offset from start of frame */
-    uint8_t l3_header_offset = (uint8_t)*(etsec->tx_buffer + 3);
-    /* L4 header offset from start of L3 header */
-    uint8_t l4_header_offset = (uint8_t)*(etsec->tx_buffer + 2);
-    /* L3 header */
-    uint8_t *l3_header = etsec->tx_buffer + 8 + l3_header_offset;
-    /* L4 header */
-    uint8_t *l4_header = l3_header + l4_header_offset;
-
-    /* if packet is IP4 and IP checksum is requested */
-    if (flags & FCB_TX_IP && flags & FCB_TX_CIP) {
-        /* do IP4 checksum (TODO This function does TCP/UDP checksum
-         * but not sure if it also does IP4 checksum.) */
-        net_checksum_calculate(etsec->tx_buffer + 8,
-                etsec->tx_buffer_len - 8);
-    }
-    /* TODO Check the correct usage of the PHCS field of the FCB in case the NPH
-     * flag is on */
-
-    /* if packet is IP4 and TCP or UDP */
-    if (flags & FCB_TX_IP && flags & FCB_TX_TUP) {
-        /* if UDP */
-        if (flags & FCB_TX_UDP) {
-            /* if checksum is requested */
-            if (flags & FCB_TX_CTU) {
-                /* do UDP checksum */
-
-                net_checksum_calculate(etsec->tx_buffer + 8,
-                        etsec->tx_buffer_len - 8);
-            } else {
-                /* set checksum field to 0 */
-                l4_header[6] = 0;
-                l4_header[7] = 0;
-            }
-        } else if (flags & FCB_TX_CTU) { /* if TCP and checksum is requested */
-            /* do TCP checksum */
-            net_checksum_calculate(etsec->tx_buffer + 8,
-                                   etsec->tx_buffer_len - 8);
-        }
-    }
-}
-
-static void process_tx_bd(eTSEC         *etsec,
-                          eTSEC_rxtx_bd *bd)
-{
-    uint8_t *tmp_buff = NULL;
-    hwaddr tbdbth     = (hwaddr)(etsec->regs[TBDBPH].value & 0xF) << 32;
-
-    if (bd->length == 0) {
-        /* ERROR */
-        return;
-    }
-
-    if (etsec->tx_buffer_len == 0) {
-        /* It's the first BD */
-        etsec->first_bd = *bd;
-    }
-
-    /* TODO: if TxBD[TOE/UN] skip the Tx Frame Control Block*/
-
-    /* Load this Data Buffer */
-    etsec->tx_buffer = g_realloc(etsec->tx_buffer,
-                                    etsec->tx_buffer_len + bd->length);
-    tmp_buff = etsec->tx_buffer + etsec->tx_buffer_len;
-    cpu_physical_memory_read(bd->bufptr + tbdbth, tmp_buff, bd->length);
-
-    /* Update buffer length */
-    etsec->tx_buffer_len += bd->length;
-
-
-    if (etsec->tx_buffer_len != 0 && (bd->flags & BD_LAST)) {
-        if (etsec->regs[MACCFG1].value & MACCFG1_TX_EN) {
-            /* MAC Transmit enabled */
-
-            /* Process offload Tx FCB */
-            if (etsec->first_bd.flags & BD_TX_TOEUN) {
-                process_tx_fcb(etsec);
-            }
-
-            if (etsec->first_bd.flags & BD_TX_PADCRC
-                || etsec->regs[MACCFG2].value & MACCFG2_PADCRC) {
-
-                /* Padding and CRC (Padding implies CRC) */
-                tx_padding_and_crc(etsec, 64);
-
-            } else if (etsec->first_bd.flags & BD_TX_TC
-                       || etsec->regs[MACCFG2].value & MACCFG2_CRC_EN) {
-
-                /* Only CRC */
-                /* Never add CRC in QEMU */
-            }
-
-#if defined(HEX_DUMP)
-            qemu_log("eTSEC Send packet size:%d\n", etsec->tx_buffer_len);
-            qemu_hexdump(etsec->tx_buffer, stderr, "", etsec->tx_buffer_len);
-#endif  /* ETSEC_RING_DEBUG */
-
-            if (etsec->first_bd.flags & BD_TX_TOEUN) {
-                qemu_send_packet(qemu_get_queue(etsec->nic),
-                        etsec->tx_buffer + 8,
-                        etsec->tx_buffer_len - 8);
-            } else {
-                qemu_send_packet(qemu_get_queue(etsec->nic),
-                        etsec->tx_buffer,
-                        etsec->tx_buffer_len);
-            }
-
-        }
-
-        etsec->tx_buffer_len = 0;
-
-        if (bd->flags & BD_INTERRUPT) {
-            ievent_set(etsec, IEVENT_TXF);
-        }
-    } else {
-        if (bd->flags & BD_INTERRUPT) {
-            ievent_set(etsec, IEVENT_TXB);
-        }
-    }
-
-    /* Update DB flags */
-
-    /* Clear Ready */
-    bd->flags &= ~BD_TX_READY;
-
-    /* Clear Defer */
-    bd->flags &= ~BD_TX_PREDEF;
-
-    /* Clear Late Collision */
-    bd->flags &= ~BD_TX_HFELC;
-
-    /* Clear Retransmission Limit */
-    bd->flags &= ~BD_TX_CFRL;
-
-    /* Clear Retry Count */
-    bd->flags &= ~(BD_TX_RC_MASK << BD_TX_RC_OFFSET);
-
-    /* Clear Underrun */
-    bd->flags &= ~BD_TX_TOEUN;
-
-    /* Clear Truncation */
-    bd->flags &= ~BD_TX_TR;
-}
-
-void etsec_walk_tx_ring(eTSEC *etsec, int ring_nbr)
-{
-    hwaddr        ring_base = 0;
-    hwaddr        bd_addr   = 0;
-    eTSEC_rxtx_bd bd;
-    uint16_t      bd_flags;
-
-    if (!(etsec->regs[MACCFG1].value & MACCFG1_TX_EN)) {
-        RING_DEBUG("%s: MAC Transmit not enabled\n", __func__);
-        return;
-    }
-
-    ring_base = (hwaddr)(etsec->regs[TBASEH].value & 0xF) << 32;
-    ring_base += etsec->regs[TBASE0 + ring_nbr].value & ~0x7;
-    bd_addr    = etsec->regs[TBPTR0 + ring_nbr].value & ~0x7;
-
-    do {
-        read_buffer_descriptor(etsec, bd_addr, &bd);
-
-#ifdef DEBUG_BD
-        print_bd(bd,
-                 eTSEC_TRANSMIT,
-                 (bd_addr - ring_base) / sizeof(eTSEC_rxtx_bd));
-
-#endif  /* DEBUG_BD */
-
-        /* Save flags before BD update */
-        bd_flags = bd.flags;
-
-        if (bd_flags & BD_TX_READY) {
-            process_tx_bd(etsec, &bd);
-
-            /* Write back BD after update */
-            write_buffer_descriptor(etsec, bd_addr, &bd);
-        }
-
-        /* Wrap or next BD */
-        if (bd_flags & BD_WRAP) {
-            bd_addr = ring_base;
-        } else {
-            bd_addr += sizeof(eTSEC_rxtx_bd);
-        }
-
-    } while (bd_addr != ring_base);
-
-    bd_addr = ring_base;
-
-    /* Save the Buffer Descriptor Pointers to current bd */
-    etsec->regs[TBPTR0 + ring_nbr].value = bd_addr;
-
-    /* Set transmit halt THLTx */
-    etsec->regs[TSTAT].value |= 1 << (31 - ring_nbr);
-}
-
-static void fill_rx_bd(eTSEC          *etsec,
-                       eTSEC_rxtx_bd  *bd,
-                       const uint8_t **buf,
-                       size_t         *size)
-{
-    uint16_t to_write;
-    hwaddr   bufptr = bd->bufptr +
-        ((hwaddr)(etsec->regs[TBDBPH].value & 0xF) << 32);
-    uint8_t  padd[etsec->rx_padding];
-    uint8_t  rem;
-
-    RING_DEBUG("eTSEC fill Rx buffer @ 0x%016" HWADDR_PRIx
-               " size:%zu(padding + crc:%u) + fcb:%u\n",
-               bufptr, *size, etsec->rx_padding, etsec->rx_fcb_size);
-
-    bd->length = 0;
-
-    /* This operation will only write FCB */
-    if (etsec->rx_fcb_size != 0) {
-
-        cpu_physical_memory_write(bufptr, etsec->rx_fcb, etsec->rx_fcb_size);
-
-        bufptr             += etsec->rx_fcb_size;
-        bd->length         += etsec->rx_fcb_size;
-        etsec->rx_fcb_size  = 0;
-
-    }
-
-    /* We remove padding from the computation of to_write because it is not
-     * allocated in the buffer.
-     */
-    to_write = MIN(*size - etsec->rx_padding,
-                   etsec->regs[MRBLR].value - etsec->rx_fcb_size);
-
-    /* This operation can only write packet data and no padding */
-    if (to_write > 0) {
-        cpu_physical_memory_write(bufptr, *buf, to_write);
-
-        *buf   += to_write;
-        bufptr += to_write;
-        *size  -= to_write;
-
-        bd->flags  &= ~BD_RX_EMPTY;
-        bd->length += to_write;
-    }
-
-    if (*size == etsec->rx_padding) {
-        /* The remaining bytes are only for padding which is not actually
-         * allocated in the data buffer.
-         */
-
-        rem = MIN(etsec->regs[MRBLR].value - bd->length, etsec->rx_padding);
-
-        if (rem > 0) {
-            memset(padd, 0x0, sizeof(padd));
-            etsec->rx_padding -= rem;
-            *size             -= rem;
-            bd->length        += rem;
-            cpu_physical_memory_write(bufptr, padd, rem);
-        }
-    }
-}
-
-static void rx_init_frame(eTSEC *etsec, const uint8_t *buf, size_t size)
-{
-    uint32_t fcb_size = 0;
-    uint8_t  prsdep   = (etsec->regs[RCTRL].value >> RCTRL_PRSDEP_OFFSET)
-        & RCTRL_PRSDEP_MASK;
-
-    if (prsdep != 0) {
-        /* Prepend FCB (FCB size + RCTRL[PAL]) */
-        fcb_size = 8 + ((etsec->regs[RCTRL].value >> 16) & 0x1F);
-
-        etsec->rx_fcb_size = fcb_size;
-
-        /* TODO: fill_FCB(etsec); */
-        memset(etsec->rx_fcb, 0x0, sizeof(etsec->rx_fcb));
-
-    } else {
-        etsec->rx_fcb_size = 0;
-    }
-
-    g_free(etsec->rx_buffer);
-
-    /* Do not copy the frame for now */
-    etsec->rx_buffer     = (uint8_t *)buf;
-    etsec->rx_buffer_len = size;
-
-    /* CRC padding (We don't have to compute the CRC) */
-    etsec->rx_padding = 4;
-
-    etsec->rx_first_in_frame = 1;
-    etsec->rx_remaining_data = etsec->rx_buffer_len;
-    RING_DEBUG("%s: rx_buffer_len:%u rx_padding+crc:%u\n", __func__,
-               etsec->rx_buffer_len, etsec->rx_padding);
-}
-
-ssize_t etsec_rx_ring_write(eTSEC *etsec, const uint8_t *buf, size_t size)
-{
-    int ring_nbr = 0;           /* Always use ring0 (no filer) */
-
-    if (etsec->rx_buffer_len != 0) {
-        RING_DEBUG("%s: We can't receive now,"
-                   " a buffer is already in the pipe\n", __func__);
-        return 0;
-    }
-
-    if (etsec->regs[RSTAT].value & 1 << (23 - ring_nbr)) {
-        RING_DEBUG("%s: The ring is halted\n", __func__);
-        return -1;
-    }
-
-    if (etsec->regs[DMACTRL].value & DMACTRL_GRS) {
-        RING_DEBUG("%s: Graceful receive stop\n", __func__);
-        return -1;
-    }
-
-    if (!(etsec->regs[MACCFG1].value & MACCFG1_RX_EN)) {
-        RING_DEBUG("%s: MAC Receive not enabled\n", __func__);
-        return -1;
-    }
-
-    if ((etsec->regs[RCTRL].value & RCTRL_RSF) && (size < 60)) {
-        /* CRC is not in the packet yet, so short frame is below 60 bytes */
-        RING_DEBUG("%s: Drop short frame\n", __func__);
-        return -1;
-    }
-
-    rx_init_frame(etsec, buf, size);
-
-    etsec_walk_rx_ring(etsec, ring_nbr);
-
-    return size;
-}
-
-void etsec_walk_rx_ring(eTSEC *etsec, int ring_nbr)
-{
-    hwaddr         ring_base     = 0;
-    hwaddr         bd_addr       = 0;
-    hwaddr         start_bd_addr = 0;
-    eTSEC_rxtx_bd  bd;
-    uint16_t       bd_flags;
-    size_t         remaining_data;
-    const uint8_t *buf;
-    uint8_t       *tmp_buf;
-    size_t         size;
-
-    if (etsec->rx_buffer_len == 0) {
-        /* No frame to send */
-        RING_DEBUG("No frame to send\n");
-        return;
-    }
-
-    remaining_data = etsec->rx_remaining_data + etsec->rx_padding;
-    buf            = etsec->rx_buffer
-        + (etsec->rx_buffer_len - etsec->rx_remaining_data);
-    size           = etsec->rx_buffer_len + etsec->rx_padding;
-
-    ring_base = (hwaddr)(etsec->regs[RBASEH].value & 0xF) << 32;
-    ring_base += etsec->regs[RBASE0 + ring_nbr].value & ~0x7;
-    start_bd_addr  = bd_addr = etsec->regs[RBPTR0 + ring_nbr].value & ~0x7;
-
-    do {
-        read_buffer_descriptor(etsec, bd_addr, &bd);
-
-#ifdef DEBUG_BD
-        print_bd(bd,
-                 eTSEC_RECEIVE,
-                 (bd_addr - ring_base) / sizeof(eTSEC_rxtx_bd));
-
-#endif  /* DEBUG_BD */
-
-        /* Save flags before BD update */
-        bd_flags = bd.flags;
-
-        if (bd_flags & BD_RX_EMPTY) {
-            fill_rx_bd(etsec, &bd, &buf, &remaining_data);
-
-            if (etsec->rx_first_in_frame) {
-                bd.flags |= BD_RX_FIRST;
-                etsec->rx_first_in_frame = 0;
-                etsec->rx_first_bd = bd;
-            }
-
-            /* Last in frame */
-            if (remaining_data == 0) {
-
-                /* Clear flags */
-
-                bd.flags &= ~0x7ff;
-
-                bd.flags |= BD_LAST;
-
-                /* NOTE: non-octet aligned frame is impossible in qemu */
-
-                if (size >= etsec->regs[MAXFRM].value) {
-                    /* frame length violation */
-                    qemu_log("%s frame length violation: size:%zu MAXFRM:%d\n",
-                           __func__, size, etsec->regs[MAXFRM].value);
-
-                    bd.flags |= BD_RX_LG;
-                }
-
-                if (size  < 64) {
-                    /* Short frame */
-                    bd.flags |= BD_RX_SH;
-                }
-
-                /* TODO: Broadcast and Multicast */
-
-                if (bd.flags & BD_INTERRUPT) {
-                    /* Set RXFx */
-                    etsec->regs[RSTAT].value |= 1 << (7 - ring_nbr);
-
-                    /* Set IEVENT */
-                    ievent_set(etsec, IEVENT_RXF);
-                }
-
-            } else {
-                if (bd.flags & BD_INTERRUPT) {
-                    /* Set IEVENT */
-                    ievent_set(etsec, IEVENT_RXB);
-                }
-            }
-
-            /* Write back BD after update */
-            write_buffer_descriptor(etsec, bd_addr, &bd);
-        }
-
-        /* Wrap or next BD */
-        if (bd_flags & BD_WRAP) {
-            bd_addr = ring_base;
-        } else {
-            bd_addr += sizeof(eTSEC_rxtx_bd);
-        }
-    } while (remaining_data != 0
-             && (bd_flags & BD_RX_EMPTY)
-             && bd_addr != start_bd_addr);
-
-    /* Reset ring ptr */
-    etsec->regs[RBPTR0 + ring_nbr].value = bd_addr;
-
-    /* The frame is too large to fit in the Rx ring */
-    if (remaining_data > 0) {
-
-        /* Set RSTAT[QHLTx] */
-        etsec->regs[RSTAT].value |= 1 << (23 - ring_nbr);
-
-        /* Save remaining data to send the end of the frame when the ring will
-         * be restarted
-         */
-        etsec->rx_remaining_data = remaining_data;
-
-        /* Copy the frame */
-        tmp_buf = g_malloc(size);
-        memcpy(tmp_buf, etsec->rx_buffer, size);
-        etsec->rx_buffer = tmp_buf;
-
-        RING_DEBUG("no empty RxBD available any more\n");
-    } else {
-        etsec->rx_buffer_len = 0;
-        etsec->rx_buffer     = NULL;
-        if (etsec->need_flush) {
-            qemu_flush_queued_packets(qemu_get_queue(etsec->nic));
-        }
-    }
-
-    RING_DEBUG("eTSEC End of ring_write: remaining_data:%zu\n", remaining_data);
-}