Merge remote-tracking branch 'origin/master' into HEAD

Resolve conflicts around apb.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

18 files changed, 251 insertions, 184 deletions

diff --git a/hw/net/e1000.c b/hw/net/e1000.c
index 05a00cb..804ec08 100644
--- a/hw/net/e1000.c
+++ b/hw/net/e1000.c
@@ -98,7 +98,10 @@ typedef struct E1000State_st {
         unsigned char data[0x10000];
         uint16_t size;
         unsigned char vlan_needed;
+        unsigned char sum_needed;
+        bool cptse;
         e1000x_txd_props props;
+        e1000x_txd_props tso_props;
         uint16_t tso_frames;
     } tx;
 
@@ -539,35 +542,37 @@ xmit_seg(E1000State *s)
     uint16_t len;
     unsigned int frames = s->tx.tso_frames, css, sofar;
     struct e1000_tx *tp = &s->tx;
+    struct e1000x_txd_props *props = tp->cptse ? &tp->tso_props : &tp->props;
 
-    if (tp->props.tse && tp->props.cptse) {
-        css = tp->props.ipcss;
+    if (tp->cptse) {
+        css = props->ipcss;
         DBGOUT(TXSUM, "frames %d size %d ipcss %d\n",
                frames, tp->size, css);
-        if (tp->props.ip) {    /* IPv4 */
+        if (props->ip) {    /* IPv4 */
             stw_be_p(tp->data+css+2, tp->size - css);
             stw_be_p(tp->data+css+4,
                      lduw_be_p(tp->data + css + 4) + frames);
         } else {         /* IPv6 */
             stw_be_p(tp->data+css+4, tp->size - css);
         }
-        css = tp->props.tucss;
+        css = props->tucss;
         len = tp->size - css;
-        DBGOUT(TXSUM, "tcp %d tucss %d len %d\n", tp->props.tcp, css, len);
-        if (tp->props.tcp) {
-            sofar = frames * tp->props.mss;
+        DBGOUT(TXSUM, "tcp %d tucss %d len %d\n", props->tcp, css, len);
+        if (props->tcp) {
+            sofar = frames * props->mss;
             stl_be_p(tp->data+css+4, ldl_be_p(tp->data+css+4)+sofar); /* seq */
-            if (tp->props.paylen - sofar > tp->props.mss) {
+            if (props->paylen - sofar > props->mss) {
                 tp->data[css + 13] &= ~9;    /* PSH, FIN */
             } else if (frames) {
                 e1000x_inc_reg_if_not_full(s->mac_reg, TSCTC);
             }
-        } else    /* UDP */
+        } else {    /* UDP */
             stw_be_p(tp->data+css+4, len);
-        if (tp->props.sum_needed & E1000_TXD_POPTS_TXSM) {
+        }
+        if (tp->sum_needed & E1000_TXD_POPTS_TXSM) {
             unsigned int phsum;
             // add pseudo-header length before checksum calculation
-            void *sp = tp->data + tp->props.tucso;
+            void *sp = tp->data + props->tucso;
 
             phsum = lduw_be_p(sp) + len;
             phsum = (phsum >> 16) + (phsum & 0xffff);
@@ -576,13 +581,11 @@ xmit_seg(E1000State *s)
         tp->tso_frames++;
     }
 
-    if (tp->props.sum_needed & E1000_TXD_POPTS_TXSM) {
-        putsum(tp->data, tp->size, tp->props.tucso,
-               tp->props.tucss, tp->props.tucse);
+    if (tp->sum_needed & E1000_TXD_POPTS_TXSM) {
+        putsum(tp->data, tp->size, props->tucso, props->tucss, props->tucse);
     }
-    if (tp->props.sum_needed & E1000_TXD_POPTS_IXSM) {
-        putsum(tp->data, tp->size, tp->props.ipcso,
-               tp->props.ipcss, tp->props.ipcse);
+    if (tp->sum_needed & E1000_TXD_POPTS_IXSM) {
+        putsum(tp->data, tp->size, props->ipcso, props->ipcss, props->ipcse);
     }
     if (tp->vlan_needed) {
         memmove(tp->vlan, tp->data, 4);
@@ -614,27 +617,27 @@ process_tx_desc(E1000State *s, struct e1000_tx_desc *dp)
 
     s->mit_ide |= (txd_lower & E1000_TXD_CMD_IDE);
     if (dtype == E1000_TXD_CMD_DEXT) {    /* context descriptor */
-        e1000x_read_tx_ctx_descr(xp, &tp->props);
-        tp->tso_frames = 0;
-        if (tp->props.tucso == 0) {    /* this is probably wrong */
-            DBGOUT(TXSUM, "TCP/UDP: cso 0!\n");
-            tp->props.tucso = tp->props.tucss + (tp->props.tcp ? 16 : 6);
+        if (le32_to_cpu(xp->cmd_and_length) & E1000_TXD_CMD_TSE) {
+            e1000x_read_tx_ctx_descr(xp, &tp->tso_props);
+            tp->tso_frames = 0;
+        } else {
+            e1000x_read_tx_ctx_descr(xp, &tp->props);
         }
         return;
     } else if (dtype == (E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D)) {
         // data descriptor
         if (tp->size == 0) {
-            tp->props.sum_needed = le32_to_cpu(dp->upper.data) >> 8;
+            tp->sum_needed = le32_to_cpu(dp->upper.data) >> 8;
         }
-        tp->props.cptse = (txd_lower & E1000_TXD_CMD_TSE) ? 1 : 0;
+        tp->cptse = (txd_lower & E1000_TXD_CMD_TSE) ? 1 : 0;
     } else {
         // legacy descriptor
-        tp->props.cptse = 0;
+        tp->cptse = 0;
     }
 
     if (e1000x_vlan_enabled(s->mac_reg) &&
         e1000x_is_vlan_txd(txd_lower) &&
-        (tp->props.cptse || txd_lower & E1000_TXD_CMD_EOP)) {
+        (tp->cptse || txd_lower & E1000_TXD_CMD_EOP)) {
         tp->vlan_needed = 1;
         stw_be_p(tp->vlan_header,
                       le16_to_cpu(s->mac_reg[VET]));
@@ -643,8 +646,8 @@ process_tx_desc(E1000State *s, struct e1000_tx_desc *dp)
     }
 
     addr = le64_to_cpu(dp->buffer_addr);
-    if (tp->props.tse && tp->props.cptse) {
-        msh = tp->props.hdr_len + tp->props.mss;
+    if (tp->cptse) {
+        msh = tp->tso_props.hdr_len + tp->tso_props.mss;
         do {
             bytes = split_size;
             if (tp->size + bytes > msh)
@@ -653,21 +656,19 @@ process_tx_desc(E1000State *s, struct e1000_tx_desc *dp)
             bytes = MIN(sizeof(tp->data) - tp->size, bytes);
             pci_dma_read(d, addr, tp->data + tp->size, bytes);
             sz = tp->size + bytes;
-            if (sz >= tp->props.hdr_len && tp->size < tp->props.hdr_len) {
-                memmove(tp->header, tp->data, tp->props.hdr_len);
+            if (sz >= tp->tso_props.hdr_len
+                && tp->size < tp->tso_props.hdr_len) {
+                memmove(tp->header, tp->data, tp->tso_props.hdr_len);
             }
             tp->size = sz;
             addr += bytes;
             if (sz == msh) {
                 xmit_seg(s);
-                memmove(tp->data, tp->header, tp->props.hdr_len);
-                tp->size = tp->props.hdr_len;
+                memmove(tp->data, tp->header, tp->tso_props.hdr_len);
+                tp->size = tp->tso_props.hdr_len;
             }
             split_size -= bytes;
         } while (bytes && split_size);
-    } else if (!tp->props.tse && tp->props.cptse) {
-        // context descriptor TSE is not set, while data descriptor TSE is set
-        DBGOUT(TXERR, "TCP segmentation error\n");
     } else {
         split_size = MIN(sizeof(tp->data) - tp->size, split_size);
         pci_dma_read(d, addr, tp->data + tp->size, split_size);
@@ -676,14 +677,14 @@ process_tx_desc(E1000State *s, struct e1000_tx_desc *dp)
 
     if (!(txd_lower & E1000_TXD_CMD_EOP))
         return;
-    if (!(tp->props.tse && tp->props.cptse && tp->size < tp->props.hdr_len)) {
+    if (!(tp->cptse && tp->size < tp->tso_props.hdr_len)) {
         xmit_seg(s);
     }
     tp->tso_frames = 0;
-    tp->props.sum_needed = 0;
+    tp->sum_needed = 0;
     tp->vlan_needed = 0;
     tp->size = 0;
-    tp->props.cptse = 0;
+    tp->cptse = 0;
 }
 
 static uint32_t
@@ -1435,7 +1436,7 @@ static const VMStateDescription vmstate_e1000_full_mac_state = {
 
 static const VMStateDescription vmstate_e1000 = {
     .name = "e1000",
-    .version_id = 2,
+    .version_id = 3,
     .minimum_version_id = 1,
     .pre_save = e1000_pre_save,
     .post_load = e1000_post_load,
@@ -1461,7 +1462,7 @@ static const VMStateDescription vmstate_e1000 = {
         VMSTATE_UINT16(tx.props.mss, E1000State),
         VMSTATE_UINT16(tx.size, E1000State),
         VMSTATE_UINT16(tx.tso_frames, E1000State),
-        VMSTATE_UINT8(tx.props.sum_needed, E1000State),
+        VMSTATE_UINT8(tx.sum_needed, E1000State),
         VMSTATE_INT8(tx.props.ip, E1000State),
         VMSTATE_INT8(tx.props.tcp, E1000State),
         VMSTATE_BUFFER(tx.header, E1000State),
@@ -1508,6 +1509,17 @@ static const VMStateDescription vmstate_e1000 = {
         VMSTATE_UINT32_SUB_ARRAY(mac_reg, E1000State, RA, 32),
         VMSTATE_UINT32_SUB_ARRAY(mac_reg, E1000State, MTA, 128),
         VMSTATE_UINT32_SUB_ARRAY(mac_reg, E1000State, VFTA, 128),
+        VMSTATE_UINT8_V(tx.tso_props.ipcss, E1000State, 3),
+        VMSTATE_UINT8_V(tx.tso_props.ipcso, E1000State, 3),
+        VMSTATE_UINT16_V(tx.tso_props.ipcse, E1000State, 3),
+        VMSTATE_UINT8_V(tx.tso_props.tucss, E1000State, 3),
+        VMSTATE_UINT8_V(tx.tso_props.tucso, E1000State, 3),
+        VMSTATE_UINT16_V(tx.tso_props.tucse, E1000State, 3),
+        VMSTATE_UINT32_V(tx.tso_props.paylen, E1000State, 3),
+        VMSTATE_UINT8_V(tx.tso_props.hdr_len, E1000State, 3),
+        VMSTATE_UINT16_V(tx.tso_props.mss, E1000State, 3),
+        VMSTATE_INT8_V(tx.tso_props.ip, E1000State, 3),
+        VMSTATE_INT8_V(tx.tso_props.tcp, E1000State, 3),
         VMSTATE_END_OF_LIST()
     },
     .subsections = (const VMStateDescription*[]) {
diff --git a/hw/net/e1000e.c b/hw/net/e1000e.c
index f1af279..191398a 100644
--- a/hw/net/e1000e.c
+++ b/hw/net/e1000e.c
@@ -556,7 +556,7 @@ static const VMStateDescription e1000e_vmstate_tx = {
     .version_id = 1,
     .minimum_version_id = 1,
     .fields = (VMStateField[]) {
-        VMSTATE_UINT8(props.sum_needed, struct e1000e_tx),
+        VMSTATE_UINT8(sum_needed, struct e1000e_tx),
         VMSTATE_UINT8(props.ipcss, struct e1000e_tx),
         VMSTATE_UINT8(props.ipcso, struct e1000e_tx),
         VMSTATE_UINT16(props.ipcse, struct e1000e_tx),
@@ -569,7 +569,7 @@ static const VMStateDescription e1000e_vmstate_tx = {
         VMSTATE_INT8(props.ip, struct e1000e_tx),
         VMSTATE_INT8(props.tcp, struct e1000e_tx),
         VMSTATE_BOOL(props.tse, struct e1000e_tx),
-        VMSTATE_BOOL(props.cptse, struct e1000e_tx),
+        VMSTATE_BOOL(cptse, struct e1000e_tx),
         VMSTATE_BOOL(skip_cp, struct e1000e_tx),
         VMSTATE_END_OF_LIST()
     }
diff --git a/hw/net/e1000e_core.c b/hw/net/e1000e_core.c
index 43a8d89..c93c466 100644
--- a/hw/net/e1000e_core.c
+++ b/hw/net/e1000e_core.c
@@ -632,18 +632,18 @@ e1000e_rss_parse_packet(E1000ECore *core,
 static void
 e1000e_setup_tx_offloads(E1000ECore *core, struct e1000e_tx *tx)
 {
-    if (tx->props.tse && tx->props.cptse) {
+    if (tx->props.tse && tx->cptse) {
         net_tx_pkt_build_vheader(tx->tx_pkt, true, true, tx->props.mss);
         net_tx_pkt_update_ip_checksums(tx->tx_pkt);
         e1000x_inc_reg_if_not_full(core->mac, TSCTC);
         return;
     }
 
-    if (tx->props.sum_needed & E1000_TXD_POPTS_TXSM) {
+    if (tx->sum_needed & E1000_TXD_POPTS_TXSM) {
         net_tx_pkt_build_vheader(tx->tx_pkt, false, true, 0);
     }
 
-    if (tx->props.sum_needed & E1000_TXD_POPTS_IXSM) {
+    if (tx->sum_needed & E1000_TXD_POPTS_IXSM) {
         net_tx_pkt_update_ip_hdr_checksum(tx->tx_pkt);
     }
 }
@@ -715,13 +715,13 @@ e1000e_process_tx_desc(E1000ECore *core,
         return;
     } else if (dtype == (E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D)) {
         /* data descriptor */
-        tx->props.sum_needed = le32_to_cpu(dp->upper.data) >> 8;
-        tx->props.cptse = (txd_lower & E1000_TXD_CMD_TSE) ? 1 : 0;
+        tx->sum_needed = le32_to_cpu(dp->upper.data) >> 8;
+        tx->cptse = (txd_lower & E1000_TXD_CMD_TSE) ? 1 : 0;
         e1000e_process_ts_option(core, dp);
     } else {
         /* legacy descriptor */
         e1000e_process_ts_option(core, dp);
-        tx->props.cptse = 0;
+        tx->cptse = 0;
     }
 
     addr = le64_to_cpu(dp->buffer_addr);
@@ -747,8 +747,8 @@ e1000e_process_tx_desc(E1000ECore *core,
         tx->skip_cp = false;
         net_tx_pkt_reset(tx->tx_pkt);
 
-        tx->props.sum_needed = 0;
-        tx->props.cptse = 0;
+        tx->sum_needed = 0;
+        tx->cptse = 0;
     }
 }
 
diff --git a/hw/net/e1000e_core.h b/hw/net/e1000e_core.h
index 1ff6978..7d8ff41 100644
--- a/hw/net/e1000e_core.h
+++ b/hw/net/e1000e_core.h
@@ -71,6 +71,8 @@ struct E1000Core {
         e1000x_txd_props props;
 
         bool skip_cp;
+        unsigned char sum_needed;
+        bool cptse;
         struct NetTxPkt *tx_pkt;
     } tx[E1000E_NUM_QUEUES];
 
diff --git a/hw/net/e1000x_common.h b/hw/net/e1000x_common.h
index 3072ce9..0268884 100644
--- a/hw/net/e1000x_common.h
+++ b/hw/net/e1000x_common.h
@@ -193,7 +193,6 @@ void e1000x_update_regs_on_autoneg_done(uint32_t *mac, uint16_t *phy);
 void e1000x_increase_size_stats(uint32_t *mac, const int *size_regs, int size);
 
 typedef struct e1000x_txd_props {
-    unsigned char sum_needed;
     uint8_t ipcss;
     uint8_t ipcso;
     uint16_t ipcse;
@@ -206,7 +205,6 @@ typedef struct e1000x_txd_props {
     int8_t ip;
     int8_t tcp;
     bool tse;
-    bool cptse;
 } e1000x_txd_props;
 
 void e1000x_read_tx_ctx_descr(struct e1000_context_desc *d,
diff --git a/hw/net/eepro100.c b/hw/net/eepro100.c
index 1c0def5..a07a632 100644
--- a/hw/net/eepro100.c
+++ b/hw/net/eepro100.c
@@ -44,6 +44,7 @@
 #include "hw/hw.h"
 #include "hw/pci/pci.h"
 #include "net/net.h"
+#include "net/eth.h"
 #include "hw/nvram/eeprom93xx.h"
 #include "sysemu/sysemu.h"
 #include "sysemu/dma.h"
@@ -323,32 +324,8 @@ static const uint16_t eepro100_mdi_mask[] = {
     0xffff, 0xffff, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
 };
 
-#define POLYNOMIAL 0x04c11db6
-
 static E100PCIDeviceInfo *eepro100_get_class(EEPRO100State *s);
 
-/* From FreeBSD (locally modified). */
-static unsigned e100_compute_mcast_idx(const uint8_t *ep)
-{
-    uint32_t crc;
-    int carry, i, j;
-    uint8_t b;
-
-    crc = 0xffffffff;
-    for (i = 0; i < 6; i++) {
-        b = *ep++;
-        for (j = 0; j < 8; j++) {
-            carry = ((crc & 0x80000000L) ? 1 : 0) ^ (b & 0x01);
-            crc <<= 1;
-            b >>= 1;
-            if (carry) {
-                crc = ((crc ^ POLYNOMIAL) | carry);
-            }
-        }
-    }
-    return (crc & BITS(7, 2)) >> 2;
-}
-
 /* Read a 16 bit control/status (CSR) register. */
 static uint16_t e100_read_reg2(EEPRO100State *s, E100RegisterOffset addr)
 {
@@ -845,7 +822,8 @@ static void set_multicast_list(EEPRO100State *s)
         uint8_t multicast_addr[6];
         pci_dma_read(&s->dev, s->cb_address + 10 + i, multicast_addr, 6);
         TRACE(OTHER, logout("multicast entry %s\n", nic_dump(multicast_addr, 6)));
-        unsigned mcast_idx = e100_compute_mcast_idx(multicast_addr);
+        unsigned mcast_idx = (net_crc32(multicast_addr, ETH_ALEN) &
+                              BITS(7, 2)) >> 2;
         assert(mcast_idx < 64);
         s->mult[mcast_idx >> 3] |= (1 << (mcast_idx & 7));
     }
@@ -1681,7 +1659,7 @@ static ssize_t nic_receive(NetClientState *nc, const uint8_t * buf, size_t size)
         if (s->configuration[21] & BIT(3)) {
           /* Multicast all bit is set, receive all multicast frames. */
         } else {
-          unsigned mcast_idx = e100_compute_mcast_idx(buf);
+          unsigned mcast_idx = (net_crc32(buf, ETH_ALEN) & BITS(7, 2)) >> 2;
           assert(mcast_idx < 64);
           if (s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7))) {
             /* Multicast frame is allowed in hash table. */
@@ -1701,7 +1679,7 @@ static ssize_t nic_receive(NetClientState *nc, const uint8_t * buf, size_t size)
         rfd_status |= 0x0004;
     } else if (s->configuration[20] & BIT(6)) {
         /* Multiple IA bit set. */
-        unsigned mcast_idx = compute_mcast_idx(buf);
+        unsigned mcast_idx = net_crc32(buf, ETH_ALEN) >> 26;
         assert(mcast_idx < 64);
         if (s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7))) {
             TRACE(RXTX, logout("%p accepted, multiple IA bit set\n", s));
diff --git a/hw/net/ftgmac100.c b/hw/net/ftgmac100.c
index 3c36ab9..704f452 100644
--- a/hw/net/ftgmac100.c
+++ b/hw/net/ftgmac100.c
@@ -762,7 +762,7 @@ static int ftgmac100_filter(FTGMAC100State *s, const uint8_t *buf, size_t len)
             }
 
             /* TODO: this does not seem to work for ftgmac100 */
-            mcast_idx = compute_mcast_idx(buf);
+            mcast_idx = net_crc32(buf, ETH_ALEN) >> 26;
             if (!(s->math[mcast_idx / 32] & (1 << (mcast_idx % 32)))) {
                 return 0;
             }
diff --git a/hw/net/imx_fec.c b/hw/net/imx_fec.c
index 90e6ee3..4fb48f6 100644
--- a/hw/net/imx_fec.c
+++ b/hw/net/imx_fec.c
@@ -196,6 +196,31 @@ static const char *imx_eth_reg_name(IMXFECState *s, uint32_t index)
     }
 }
 
+/*
+ * Versions of this device with more than one TX descriptor save the
+ * 2nd and 3rd descriptors in a subsection, to maintain migration
+ * compatibility with previous versions of the device that only
+ * supported a single descriptor.
+ */
+static bool imx_eth_is_multi_tx_ring(void *opaque)
+{
+    IMXFECState *s = IMX_FEC(opaque);
+
+    return s->tx_ring_num > 1;
+}
+
+static const VMStateDescription vmstate_imx_eth_txdescs = {
+    .name = "imx.fec/txdescs",
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .needed = imx_eth_is_multi_tx_ring,
+    .fields = (VMStateField[]) {
+         VMSTATE_UINT32(tx_descriptor[1], IMXFECState),
+         VMSTATE_UINT32(tx_descriptor[2], IMXFECState),
+         VMSTATE_END_OF_LIST()
+    }
+};
+
 static const VMStateDescription vmstate_imx_eth = {
     .name = TYPE_IMX_FEC,
     .version_id = 2,
@@ -203,15 +228,18 @@ static const VMStateDescription vmstate_imx_eth = {
     .fields = (VMStateField[]) {
         VMSTATE_UINT32_ARRAY(regs, IMXFECState, ENET_MAX),
         VMSTATE_UINT32(rx_descriptor, IMXFECState),
-        VMSTATE_UINT32(tx_descriptor, IMXFECState),
-
+        VMSTATE_UINT32(tx_descriptor[0], IMXFECState),
         VMSTATE_UINT32(phy_status, IMXFECState),
         VMSTATE_UINT32(phy_control, IMXFECState),
         VMSTATE_UINT32(phy_advertise, IMXFECState),
         VMSTATE_UINT32(phy_int, IMXFECState),
         VMSTATE_UINT32(phy_int_mask, IMXFECState),
         VMSTATE_END_OF_LIST()
-    }
+    },
+    .subsections = (const VMStateDescription * []) {
+        &vmstate_imx_eth_txdescs,
+        NULL
+    },
 };
 
 #define PHY_INT_ENERGYON            (1 << 7)
@@ -405,9 +433,8 @@ static void imx_eth_update(IMXFECState *s)
 static void imx_fec_do_tx(IMXFECState *s)
 {
     int frame_size = 0, descnt = 0;
-    uint8_t frame[ENET_MAX_FRAME_SIZE];
-    uint8_t *ptr = frame;
-    uint32_t addr = s->tx_descriptor;
+    uint8_t *ptr = s->frame;
+    uint32_t addr = s->tx_descriptor[0];
 
     while (descnt++ < IMX_MAX_DESC) {
         IMXFECBufDesc bd;
@@ -431,8 +458,8 @@ static void imx_fec_do_tx(IMXFECState *s)
         frame_size += len;
         if (bd.flags & ENET_BD_L) {
             /* Last buffer in frame.  */
-            qemu_send_packet(qemu_get_queue(s->nic), frame, frame_size);
-            ptr = frame;
+            qemu_send_packet(qemu_get_queue(s->nic), s->frame, frame_size);
+            ptr = s->frame;
             frame_size = 0;
             s->regs[ENET_EIR] |= ENET_INT_TXF;
         }
@@ -448,17 +475,47 @@ static void imx_fec_do_tx(IMXFECState *s)
         }
     }
 
-    s->tx_descriptor = addr;
+    s->tx_descriptor[0] = addr;
 
     imx_eth_update(s);
 }
 
-static void imx_enet_do_tx(IMXFECState *s)
+static void imx_enet_do_tx(IMXFECState *s, uint32_t index)
 {
     int frame_size = 0, descnt = 0;
-    uint8_t frame[ENET_MAX_FRAME_SIZE];
-    uint8_t *ptr = frame;
-    uint32_t addr = s->tx_descriptor;
+
+    uint8_t *ptr = s->frame;
+    uint32_t addr, int_txb, int_txf, tdsr;
+    size_t ring;
+
+    switch (index) {
+    case ENET_TDAR:
+        ring    = 0;
+        int_txb = ENET_INT_TXB;
+        int_txf = ENET_INT_TXF;
+        tdsr    = ENET_TDSR;
+        break;
+    case ENET_TDAR1:
+        ring    = 1;
+        int_txb = ENET_INT_TXB1;
+        int_txf = ENET_INT_TXF1;
+        tdsr    = ENET_TDSR1;
+        break;
+    case ENET_TDAR2:
+        ring    = 2;
+        int_txb = ENET_INT_TXB2;
+        int_txf = ENET_INT_TXF2;
+        tdsr    = ENET_TDSR2;
+        break;
+    default:
+        qemu_log_mask(LOG_GUEST_ERROR,
+                      "%s: bogus value for index %x\n",
+                      __func__, index);
+        abort();
+        break;
+    }
+
+    addr = s->tx_descriptor[ring];
 
     while (descnt++ < IMX_MAX_DESC) {
         IMXENETBufDesc bd;
@@ -482,13 +539,13 @@ static void imx_enet_do_tx(IMXFECState *s)
         frame_size += len;
         if (bd.flags & ENET_BD_L) {
             if (bd.option & ENET_BD_PINS) {
-                struct ip_header *ip_hd = PKT_GET_IP_HDR(frame);
+                struct ip_header *ip_hd = PKT_GET_IP_HDR(s->frame);
                 if (IP_HEADER_VERSION(ip_hd) == 4) {
-                    net_checksum_calculate(frame, frame_size);
+                    net_checksum_calculate(s->frame, frame_size);
                 }
             }
             if (bd.option & ENET_BD_IINS) {
-                struct ip_header *ip_hd = PKT_GET_IP_HDR(frame);
+                struct ip_header *ip_hd = PKT_GET_IP_HDR(s->frame);
                 /* We compute checksum only for IPv4 frames */
                 if (IP_HEADER_VERSION(ip_hd) == 4) {
                     uint16_t csum;
@@ -498,57 +555,59 @@ static void imx_enet_do_tx(IMXFECState *s)
                 }
             }
             /* Last buffer in frame.  */
-            qemu_send_packet(qemu_get_queue(s->nic), frame, len);
-            ptr = frame;
+
+            qemu_send_packet(qemu_get_queue(s->nic), s->frame, frame_size);
+            ptr = s->frame;
+
             frame_size = 0;
             if (bd.option & ENET_BD_TX_INT) {
-                s->regs[ENET_EIR] |= ENET_INT_TXF;
+                s->regs[ENET_EIR] |= int_txf;
             }
         }
         if (bd.option & ENET_BD_TX_INT) {
-            s->regs[ENET_EIR] |= ENET_INT_TXB;
+            s->regs[ENET_EIR] |= int_txb;
         }
         bd.flags &= ~ENET_BD_R;
         /* Write back the modified descriptor.  */
         imx_enet_write_bd(&bd, addr);
         /* Advance to the next descriptor.  */
         if ((bd.flags & ENET_BD_W) != 0) {
-            addr = s->regs[ENET_TDSR];
+            addr = s->regs[tdsr];
         } else {
             addr += sizeof(bd);
         }
     }
 
-    s->tx_descriptor = addr;
+    s->tx_descriptor[ring] = addr;
 
     imx_eth_update(s);
 }
 
-static void imx_eth_do_tx(IMXFECState *s)
+static void imx_eth_do_tx(IMXFECState *s, uint32_t index)
 {
     if (!s->is_fec && (s->regs[ENET_ECR] & ENET_ECR_EN1588)) {
-        imx_enet_do_tx(s);
+        imx_enet_do_tx(s, index);
     } else {
         imx_fec_do_tx(s);
     }
 }
 
-static void imx_eth_enable_rx(IMXFECState *s)
+static void imx_eth_enable_rx(IMXFECState *s, bool flush)
 {
     IMXFECBufDesc bd;
-    bool tmp;
+    bool rx_ring_full;
 
     imx_fec_read_bd(&bd, s->rx_descriptor);
 
-    tmp = ((bd.flags & ENET_BD_E) != 0);
+    rx_ring_full = !(bd.flags & ENET_BD_E);
 
-    if (!tmp) {
+    if (rx_ring_full) {
         FEC_PRINTF("RX buffer full\n");
-    } else if (!s->regs[ENET_RDAR]) {
+    } else if (flush) {
         qemu_flush_queued_packets(qemu_get_queue(s->nic));
     }
 
-    s->regs[ENET_RDAR] = tmp ? ENET_RDAR_RDAR : 0;
+    s->regs[ENET_RDAR] = rx_ring_full ? 0 : ENET_RDAR_RDAR;
 }
 
 static void imx_eth_reset(DeviceState *d)
@@ -585,7 +644,7 @@ static void imx_eth_reset(DeviceState *d)
     }
 
     s->rx_descriptor = 0;
-    s->tx_descriptor = 0;
+    memset(s->tx_descriptor, 0, sizeof(s->tx_descriptor));
 
     /* We also reset the PHY */
     phy_reset(s);
@@ -791,6 +850,7 @@ static void imx_eth_write(void *opaque, hwaddr offset, uint64_t value,
                            unsigned size)
 {
     IMXFECState *s = IMX_FEC(opaque);
+    const bool single_tx_ring = !imx_eth_is_multi_tx_ring(s);
     uint32_t index = offset >> 2;
 
     FEC_PRINTF("reg[%s] <= 0x%" PRIx32 "\n", imx_eth_reg_name(s, index),
@@ -807,16 +867,24 @@ static void imx_eth_write(void *opaque, hwaddr offset, uint64_t value,
         if (s->regs[ENET_ECR] & ENET_ECR_ETHEREN) {
             if (!s->regs[index]) {
                 s->regs[index] = ENET_RDAR_RDAR;
-                imx_eth_enable_rx(s);
+                imx_eth_enable_rx(s, true);
             }
         } else {
             s->regs[index] = 0;
         }
         break;
-    case ENET_TDAR:
+    case ENET_TDAR1:    /* FALLTHROUGH */
+    case ENET_TDAR2:    /* FALLTHROUGH */
+        if (unlikely(single_tx_ring)) {
+            qemu_log_mask(LOG_GUEST_ERROR,
+                          "[%s]%s: trying to access TDAR2 or TDAR1\n",
+                          TYPE_IMX_FEC, __func__);
+            return;
+        }
+    case ENET_TDAR:     /* FALLTHROUGH */
         if (s->regs[ENET_ECR] & ENET_ECR_ETHEREN) {
             s->regs[index] = ENET_TDAR_TDAR;
-            imx_eth_do_tx(s);
+            imx_eth_do_tx(s, index);
         }
         s->regs[index] = 0;
         break;
@@ -828,8 +896,12 @@ static void imx_eth_write(void *opaque, hwaddr offset, uint64_t value,
         if ((s->regs[index] & ENET_ECR_ETHEREN) == 0) {
             s->regs[ENET_RDAR] = 0;
             s->rx_descriptor = s->regs[ENET_RDSR];
-            s->regs[ENET_TDAR] = 0;
-            s->tx_descriptor = s->regs[ENET_TDSR];
+            s->regs[ENET_TDAR]  = 0;
+            s->regs[ENET_TDAR1] = 0;
+            s->regs[ENET_TDAR2] = 0;
+            s->tx_descriptor[0] = s->regs[ENET_TDSR];
+            s->tx_descriptor[1] = s->regs[ENET_TDSR1];
+            s->tx_descriptor[2] = s->regs[ENET_TDSR2];
         }
         break;
     case ENET_MMFR:
@@ -907,7 +979,29 @@ static void imx_eth_write(void *opaque, hwaddr offset, uint64_t value,
         } else {
             s->regs[index] = value & ~7;
         }
-        s->tx_descriptor = s->regs[index];
+        s->tx_descriptor[0] = s->regs[index];
+        break;
+    case ENET_TDSR1:
+        if (unlikely(single_tx_ring)) {
+            qemu_log_mask(LOG_GUEST_ERROR,
+                          "[%s]%s: trying to access TDSR1\n",
+                          TYPE_IMX_FEC, __func__);
+            return;
+        }
+
+        s->regs[index] = value & ~7;
+        s->tx_descriptor[1] = s->regs[index];
+        break;
+    case ENET_TDSR2:
+        if (unlikely(single_tx_ring)) {
+            qemu_log_mask(LOG_GUEST_ERROR,
+                          "[%s]%s: trying to access TDSR2\n",
+                          TYPE_IMX_FEC, __func__);
+            return;
+        }
+
+        s->regs[index] = value & ~7;
+        s->tx_descriptor[2] = s->regs[index];
         break;
     case ENET_MRBR:
         s->regs[index] = value & 0x00003ff0;
@@ -930,7 +1024,7 @@ static int imx_eth_can_receive(NetClientState *nc)
 
     FEC_PRINTF("\n");
 
-    return s->regs[ENET_RDAR] ? 1 : 0;
+    return !!s->regs[ENET_RDAR];
 }
 
 static ssize_t imx_fec_receive(NetClientState *nc, const uint8_t *buf,
@@ -1020,7 +1114,7 @@ static ssize_t imx_fec_receive(NetClientState *nc, const uint8_t *buf,
         }
     }
     s->rx_descriptor = addr;
-    imx_eth_enable_rx(s);
+    imx_eth_enable_rx(s, false);
     imx_eth_update(s);
     return len;
 }
@@ -1037,6 +1131,7 @@ static ssize_t imx_enet_receive(NetClientState *nc, const uint8_t *buf,
     uint8_t *crc_ptr;
     unsigned int buf_len;
     size_t size = len;
+    bool shift16 = s->regs[ENET_RACC] & ENET_RACC_SHIFT16;
 
     FEC_PRINTF("len %d\n", (int)size);
 
@@ -1051,9 +1146,13 @@ static ssize_t imx_enet_receive(NetClientState *nc, const uint8_t *buf,
     crc = cpu_to_be32(crc32(~0, buf, size));
     crc_ptr = (uint8_t *) &crc;
 
-    /* Huge frames are truncted.  */
-    if (size > ENET_MAX_FRAME_SIZE) {
-        size = ENET_MAX_FRAME_SIZE;
+    if (shift16) {
+        size += 2;
+    }
+
+    /* Huge frames are truncated. */
+    if (size > s->regs[ENET_FTRL]) {
+        size = s->regs[ENET_FTRL];
         flags |= ENET_BD_TR | ENET_BD_LG;
     }
 
@@ -1076,7 +1175,7 @@ static ssize_t imx_enet_receive(NetClientState *nc, const uint8_t *buf,
                           TYPE_IMX_FEC, __func__);
             break;
         }
-        buf_len = (size <= s->regs[ENET_MRBR]) ? size : s->regs[ENET_MRBR];
+        buf_len = MIN(size, s->regs[ENET_MRBR]);
         bd.length = buf_len;
         size -= buf_len;
 
@@ -1087,6 +1186,24 @@ static ssize_t imx_enet_receive(NetClientState *nc, const uint8_t *buf,
             buf_len += size - 4;
         }
         buf_addr = bd.data;
+
+        if (shift16) {
+            /*
+             * If SHIFT16 bit of ENETx_RACC register is set we need to
+             * align the payload to 4-byte boundary.
+             */
+            const uint8_t zeros[2] = { 0 };
+
+            dma_memory_write(&address_space_memory, buf_addr,
+                             zeros, sizeof(zeros));
+
+            buf_addr += sizeof(zeros);
+            buf_len  -= sizeof(zeros);
+
+            /* We only do this once per Ethernet frame */
+            shift16 = false;
+        }
+
         dma_memory_write(&address_space_memory, buf_addr, buf, buf_len);
         buf += buf_len;
         if (size < 4) {
@@ -1116,7 +1233,7 @@ static ssize_t imx_enet_receive(NetClientState *nc, const uint8_t *buf,
         }
     }
     s->rx_descriptor = addr;
-    imx_eth_enable_rx(s);
+    imx_eth_enable_rx(s, false);
     imx_eth_update(s);
     return len;
 }
@@ -1164,15 +1281,13 @@ static void imx_eth_realize(DeviceState *dev, Error **errp)
     SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
 
     memory_region_init_io(&s->iomem, OBJECT(dev), &imx_eth_ops, s,
-                          TYPE_IMX_FEC, 0x400);
+                          TYPE_IMX_FEC, FSL_IMX25_FEC_SIZE);
     sysbus_init_mmio(sbd, &s->iomem);
     sysbus_init_irq(sbd, &s->irq[0]);
     sysbus_init_irq(sbd, &s->irq[1]);
 
     qemu_macaddr_default_if_unset(&s->conf.macaddr);
 
-    s->conf.peers.ncs[0] = nd_table[0].netdev;
-
     s->nic = qemu_new_nic(&imx_eth_net_info, &s->conf,
                           object_get_typename(OBJECT(dev)),
                           DEVICE(dev)->id, s);
@@ -1182,6 +1297,7 @@ static void imx_eth_realize(DeviceState *dev, Error **errp)
 
 static Property imx_eth_properties[] = {
     DEFINE_NIC_PROPERTIES(IMXFECState, conf),
+    DEFINE_PROP_UINT32("tx-ring-num", IMXFECState, tx_ring_num, 1),
     DEFINE_PROP_END_OF_LIST(),
 };
 
diff --git a/hw/net/lan9118.c b/hw/net/lan9118.c
index 3db8937..b9032da 100644
--- a/hw/net/lan9118.c
+++ b/hw/net/lan9118.c
@@ -13,6 +13,7 @@
 #include "qemu/osdep.h"
 #include "hw/sysbus.h"
 #include "net/net.h"
+#include "net/eth.h"
 #include "hw/devices.h"
 #include "sysemu/sysemu.h"
 #include "hw/ptimer.h"
@@ -504,7 +505,7 @@ static int lan9118_filter(lan9118_state *s, const uint8_t *addr)
         }
     } else {
         /* Hash matching  */
-        hash = compute_mcast_idx(addr);
+        hash = net_crc32(addr, ETH_ALEN) >> 26;
         if (hash & 0x20) {
             return (s->mac_hashh >> (hash & 0x1f)) & 1;
         } else {
diff --git a/hw/net/lance.c b/hw/net/lance.c
index 23929fd..0028bc5 100644
--- a/hw/net/lance.c
+++ b/hw/net/lance.c
@@ -40,7 +40,7 @@
 #include "net/net.h"
 #include "qemu/timer.h"
 #include "qemu/sockets.h"
-#include "hw/sparc/sun4m.h"
+#include "hw/sparc/sparc32_dma.h"
 #include "hw/net/lance.h"
 #include "trace.h"
 #include "sysemu/sysemu.h"
diff --git a/hw/net/ne2000-isa.c b/hw/net/ne2000-isa.c
index f345533..70e5c1d 100644
--- a/hw/net/ne2000-isa.c
+++ b/hw/net/ne2000-isa.c
@@ -22,17 +22,15 @@
  * THE SOFTWARE.
  */
 #include "qemu/osdep.h"
-#include "hw/hw.h"
-#include "hw/i386/pc.h"
 #include "hw/isa/isa.h"
+#include "hw/net/ne2000-isa.h"
 #include "hw/qdev.h"
-#include "net/net.h"
 #include "ne2000.h"
+#include "sysemu/sysemu.h"
 #include "exec/address-spaces.h"
 #include "qapi/error.h"
 #include "qapi/visitor.h"
 
-#define TYPE_ISA_NE2000 "ne2k_isa"
 #define ISA_NE2000(obj) OBJECT_CHECK(ISANE2000State, (obj), TYPE_ISA_NE2000)
 
 typedef struct ISANE2000State {
diff --git a/hw/net/ne2000.c b/hw/net/ne2000.c
index 3938e6d..687ef84 100644
--- a/hw/net/ne2000.c
+++ b/hw/net/ne2000.c
@@ -22,9 +22,9 @@
  * THE SOFTWARE.
  */
 #include "qemu/osdep.h"
-#include "hw/hw.h"
 #include "hw/pci/pci.h"
 #include "net/net.h"
+#include "net/eth.h"
 #include "ne2000.h"
 #include "hw/loader.h"
 #include "sysemu/sysemu.h"
@@ -201,7 +201,7 @@ ssize_t ne2000_receive(NetClientState *nc, const uint8_t *buf, size_t size_)
             /* multicast */
             if (!(s->rxcr & 0x08))
                 return size;
-            mcast_idx = compute_mcast_idx(buf);
+            mcast_idx = net_crc32(buf, ETH_ALEN) >> 26;
             if (!(s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7))))
                 return size;
         } else if (s->mem[0] == buf[0] &&
diff --git a/hw/net/ne2000.h b/hw/net/ne2000.h
index d213dcc..adb8021 100644
--- a/hw/net/ne2000.h
+++ b/hw/net/ne2000.h
@@ -1,6 +1,9 @@
 #ifndef HW_NE2000_H
 #define HW_NE2000_H
 
+#include "hw/hw.h"
+#include "net/net.h"
+
 #define NE2000_PMEM_SIZE    (32*1024)
 #define NE2000_PMEM_START   (16*1024)
 #define NE2000_PMEM_END     (NE2000_PMEM_SIZE+NE2000_PMEM_START)
diff --git a/hw/net/opencores_eth.c b/hw/net/opencores_eth.c
index 268d6a7..d42b79c 100644
--- a/hw/net/opencores_eth.c
+++ b/hw/net/opencores_eth.c
@@ -36,6 +36,7 @@
 #include "hw/net/mii.h"
 #include "hw/sysbus.h"
 #include "net/net.h"
+#include "net/eth.h"
 #include "sysemu/sysemu.h"
 #include "trace.h"
 
@@ -373,7 +374,7 @@ static ssize_t open_eth_receive(NetClientState *nc,
         if (memcmp(buf, bcast_addr, sizeof(bcast_addr)) == 0) {
             miss = GET_REGBIT(s, MODER, BRO);
         } else if ((buf[0] & 0x1) || GET_REGBIT(s, MODER, IAM)) {
-            unsigned mcast_idx = compute_mcast_idx(buf);
+            unsigned mcast_idx = net_crc32(buf, ETH_ALEN) >> 26;
             miss = !(s->regs[HASH0 + mcast_idx / 32] &
                     (1 << (mcast_idx % 32)));
             trace_open_eth_receive_mcast(
diff --git a/hw/net/pcnet.c b/hw/net/pcnet.c
index 6544553..39d5d93 100644
--- a/hw/net/pcnet.c
+++ b/hw/net/pcnet.c
@@ -38,6 +38,7 @@
 #include "qemu/osdep.h"
 #include "hw/qdev.h"
 #include "net/net.h"
+#include "net/eth.h"
 #include "qemu/timer.h"
 #include "qemu/sockets.h"
 #include "sysemu/sysemu.h"
@@ -522,25 +523,6 @@ static inline void pcnet_rmd_store(PCNetState *s, struct pcnet_RMD *rmd,
            be16_to_cpu(hdr->ether_type));       \
 } while (0)
 
-#define MULTICAST_FILTER_LEN 8
-
-static inline uint32_t lnc_mchash(const uint8_t *ether_addr)
-{
-#define LNC_POLYNOMIAL          0xEDB88320UL
-    uint32_t crc = 0xFFFFFFFF;
-    int idx, bit;
-    uint8_t data;
-
-    for (idx = 0; idx < 6; idx++) {
-        for (data = *ether_addr++, bit = 0; bit < MULTICAST_FILTER_LEN; bit++) {
-            crc = (crc >> 1) ^ (((crc ^ data) & 1) ? LNC_POLYNOMIAL : 0);
-            data >>= 1;
-        }
-    }
-    return crc;
-#undef LNC_POLYNOMIAL
-}
-
 #define CRC(crc, ch)	 (crc = (crc >> 8) ^ crctab[(crc ^ (ch)) & 0xff])
 
 /* generated using the AUTODIN II polynomial
@@ -656,7 +638,7 @@ static inline int ladr_match(PCNetState *s, const uint8_t *buf, int size)
             s->csr[10] & 0xff, s->csr[10] >> 8,
             s->csr[11] & 0xff, s->csr[11] >> 8
         };
-        int index = lnc_mchash(hdr->ether_dhost) >> 26;
+        int index = net_crc32_le(hdr->ether_dhost, ETH_ALEN) >> 26;
         return !!(ladr[index >> 3] & (1 << (index & 7)));
     }
     return 0;
diff --git a/hw/net/rtl8139.c b/hw/net/rtl8139.c
index a6b2a9f..1cc95b8 100644
--- a/hw/net/rtl8139.c
+++ b/hw/net/rtl8139.c
@@ -882,7 +882,7 @@ static ssize_t rtl8139_do_receive(NetClientState *nc, const uint8_t *buf, size_t
                 return size;
             }
 
-            int mcast_idx = compute_mcast_idx(buf);
+            int mcast_idx = net_crc32(buf, ETH_ALEN) >> 26;
 
             if (!(s->mult[mcast_idx >> 3] & (1 << (mcast_idx & 7))))
             {
diff --git a/hw/net/sungem.c b/hw/net/sungem.c
index 6aa8d11..60f1e47 100644
--- a/hw/net/sungem.c
+++ b/hw/net/sungem.c
@@ -11,12 +11,11 @@
 #include "hw/pci/pci.h"
 #include "qemu/log.h"
 #include "net/net.h"
+#include "net/eth.h"
 #include "net/checksum.h"
 #include "hw/net/mii.h"
 #include "sysemu/sysemu.h"
 #include "trace.h"
-/* For crc32 */
-#include <zlib.h>
 
 #define TYPE_SUNGEM "sungem"
 
@@ -595,7 +594,7 @@ static ssize_t sungem_receive(NetClientState *nc, const uint8_t *buf,
     }
 
     /* Get MAC crc */
-    mac_crc = crc32(~0, buf, 6);
+    mac_crc = net_crc32_le(buf, ETH_ALEN);
 
     /* Packet isn't for me ? */
     rx_cond = sungem_check_rx_mac(s, buf, mac_crc);
diff --git a/hw/net/sunhme.c b/hw/net/sunhme.c
index b1efa1b..7558fca 100644
--- a/hw/net/sunhme.c
+++ b/hw/net/sunhme.c
@@ -698,29 +698,6 @@ static inline void sunhme_set_rx_ring_nr(SunHMEState *s, int i)
     s->erxregs[HME_ERXI_RING >> 2] = ring;
 }
 
-#define POLYNOMIAL_LE 0xedb88320
-static uint32_t sunhme_crc32_le(const uint8_t *p, int len)
-{
-    uint32_t crc;
-    int carry, i, j;
-    uint8_t b;
-
-    crc = 0xffffffff;
-    for (i = 0; i < len; i++) {
-        b = *p++;
-        for (j = 0; j < 8; j++) {
-            carry = (crc & 0x1) ^ (b & 0x01);
-            crc >>= 1;
-            b >>= 1;
-            if (carry) {
-                crc = crc ^ POLYNOMIAL_LE;
-            }
-        }
-    }
-
-    return crc;
-}
-
 #define MIN_BUF_SIZE 60
 
 static ssize_t sunhme_receive(NetClientState *nc, const uint8_t *buf,
@@ -761,7 +738,7 @@ static ssize_t sunhme_receive(NetClientState *nc, const uint8_t *buf,
             trace_sunhme_rx_filter_bcast_match();
         } else if (s->macregs[HME_MACI_RXCFG >> 2] & HME_MAC_RXCFG_HENABLE) {
             /* Didn't match local address, check hash filter */
-            int mcast_idx = sunhme_crc32_le(buf, 6) >> 26;
+            int mcast_idx = net_crc32_le(buf, ETH_ALEN) >> 26;
             if (!(s->macregs[(HME_MACI_HASHTAB0 >> 2) - (mcast_idx >> 4)] &
                     (1 << (mcast_idx & 0xf)))) {
                 /* Didn't match hash filter */