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igb: Implement igb-specific oversize check 

igb has a configurable size limit for LPE, and uses different limits
depending on whether the packet is treated as a VLAN packet.

Signed-off-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Reviewed-by: Sriram Yagnaraman <sriram.yagnaraman@est.tech>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Akihiko Odaki 2023-05-23 11:43:31 +09:00 committed by Jason Wang
parent 6aa262f8e3
commit bb97003e73
1 changed files with 21 additions and 15 deletions
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36
hw/net/igb_core.c
View File

@ -980,16 +980,13 @@ igb_rx_l4_cso_enabled(IGBCore *core)
return !!(core->mac[RXCSUM] & E1000_RXCSUM_TUOFLD);
}
static bool
igb_rx_is_oversized(IGBCore *core, uint16_t qn, size_t size)
static bool igb_rx_is_oversized(IGBCore *core, const struct eth_header *ehdr,
size_t size, size_t vlan_num,
bool lpe, uint16_t rlpml)
{
uint16_t pool = qn % IGB_NUM_VM_POOLS;
bool lpe = !!(core->mac[VMOLR0 + pool] & E1000_VMOLR_LPE);
int max_ethernet_lpe_size =
core->mac[VMOLR0 + pool] & E1000_VMOLR_RLPML_MASK;
int max_ethernet_vlan_size = 1522;
return size > (lpe ? max_ethernet_lpe_size : max_ethernet_vlan_size);
size_t vlan_header_size = sizeof(struct vlan_header) * vlan_num;
size_t header_size = sizeof(struct eth_header) + vlan_header_size;
return lpe ? size + ETH_FCS_LEN > rlpml : size > header_size + ETH_MTU;
}
static uint16_t igb_receive_assign(IGBCore *core, const L2Header *l2_header,
@ -1002,6 +999,8 @@ static uint16_t igb_receive_assign(IGBCore *core, const L2Header *l2_header,
uint16_t queues = 0;
uint16_t oversized = 0;
size_t vlan_num = 0;
bool lpe;
uint16_t rlpml;
int i;
memset(rss_info, 0, sizeof(E1000E_RSSInfo));
@ -1021,6 +1020,14 @@ static uint16_t igb_receive_assign(IGBCore *core, const L2Header *l2_header,
}
}
lpe = !!(core->mac[RCTL] & E1000_RCTL_LPE);
rlpml = core->mac[RLPML];
if (!(core->mac[RCTL] & E1000_RCTL_SBP) &&
igb_rx_is_oversized(core, ehdr, size, vlan_num, lpe, rlpml)) {
trace_e1000x_rx_oversized(size);
return queues;
}
if (vlan_num &&
!e1000x_rx_vlan_filter(core->mac, l2_header->vlan + vlan_num - 1)) {
return queues;
@ -1106,7 +1113,11 @@ static uint16_t igb_receive_assign(IGBCore *core, const L2Header *l2_header,
queues &= core->mac[VFRE];
if (queues) {
for (i = 0; i < IGB_NUM_VM_POOLS; i++) {
if ((queues & BIT(i)) && igb_rx_is_oversized(core, i, size)) {
lpe = !!(core->mac[VMOLR0 + i] & E1000_VMOLR_LPE);
rlpml = core->mac[VMOLR0 + i] & E1000_VMOLR_RLPML_MASK;
if ((queues & BIT(i)) &&
igb_rx_is_oversized(core, ehdr, size, vlan_num,
lpe, rlpml)) {
oversized |= BIT(i);
}
}
@ -1662,11 +1673,6 @@ igb_receive_internal(IGBCore *core, const struct iovec *iov, int iovcnt,
iov_to_buf(iov, iovcnt, iov_ofs, &buf, sizeof(buf.l2_header));
}
/* Discard oversized packets if !LPE and !SBP. */
if (e1000x_is_oversized(core->mac, size)) {
return orig_size;
}
net_rx_pkt_set_packet_type(core->rx_pkt,
get_eth_packet_type(&buf.l2_header.eth));
net_rx_pkt_set_protocols(core->rx_pkt, iov, iovcnt, iov_ofs);