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igb: packet-split descriptors support

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Packet-split descriptors are used by Linux VF driver for MTU values from 2048

Signed-off-by: Tomasz Dzieciol <t.dzieciol@partner.samsung.com>
Reviewed-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Tested-by: Akihiko Odaki <akihiko.odaki@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Tomasz Dzieciol 2023-05-29 16:01:52 +02:00 • committed by Jason Wang
parent 1c4e67a5be
commit 560cf339b2
3 changed files with 316 additions and 43 deletions
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9
hw/net/igb_regs.h
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@ -452,6 +452,7 @@ union e1000_adv_rx_desc {
#define E1000_SRRCTL_BSIZEHDRSIZE_MASK 0x00000F00
#define E1000_SRRCTL_BSIZEHDRSIZE_SHIFT 2 /* Shift _left_ */
#define E1000_SRRCTL_DESCTYPE_ADV_ONEBUF 0x02000000
#define E1000_SRRCTL_DESCTYPE_HDR_SPLIT 0x04000000
#define E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS 0x0A000000
#define E1000_SRRCTL_DESCTYPE_MASK 0x0E000000
#define E1000_SRRCTL_DROP_EN 0x80000000
@ -699,6 +700,14 @@ union e1000_adv_rx_desc {
#define E1000_ADVRXD_PKT_UDP BIT(5)
#define E1000_ADVRXD_PKT_SCTP BIT(6)
#define IGB_MAX_PS_BUFFERS 2
#define E1000_ADVRXD_HDR_LEN_OFFSET (21 - 16)
#define E1000_ADVRXD_ADV_HDR_LEN_MASK ((BIT(10) - 1) << \
E1000_ADVRXD_HDR_LEN_OFFSET)
#define E1000_ADVRXD_HDR_SPH BIT(15)
#define E1000_ADVRXD_ST_ERR_HBO_OFFSET BIT(3 + 20)
static inline uint8_t igb_ivar_entry_rx(uint8_t i)
{
return i < 8 ? i * 4 : (i - 8) * 4 + 2;