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envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a01:111:f400:7e1a::71e; envelope-from=sriram.yagnaraman@est.tech; helo=EUR05-DB8-obe.outbound.protection.outlook.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @estab.onmicrosoft.com) X-ZM-MESSAGEID: 1675085968471100003 Content-Type: text/plain; charset="utf-8" I would like to review and be informed on changes to igb device Signed-off-by: Sriram Yagnaraman --- MAINTAINERS | 1 + 1 file changed, 1 insertion(+) diff --git a/MAINTAINERS b/MAINTAINERS index ece23b2b15..7d0e84ce37 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2224,6 +2224,7 @@ F: tests/qtest/libqos/e1000e.* =20 igb M: Akihiko Odaki +R: Sriram Yagnaraman S: Maintained F: docs/system/devices/igb.rst F: hw/net/igb* --=20 2.34.1 From nobody Fri Apr 19 00:24:54 2024 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; 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envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a01:111:f400:7e1a::71e; envelope-from=sriram.yagnaraman@est.tech; helo=EUR05-DB8-obe.outbound.protection.outlook.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @estab.onmicrosoft.com) X-ZM-MESSAGEID: 1675085792892100001 Content-Type: text/plain; charset="utf-8" Use PFRSTD to reset RSTI bit for VFs, and raise VFLRE interrupt when VF is reset. Signed-off-by: Sriram Yagnaraman --- hw/net/e1000x_regs.h | 1 + hw/net/igb_core.c | 33 +++++++++++++++++++++------------ hw/net/trace-events | 2 ++ 3 files changed, 24 insertions(+), 12 deletions(-) diff --git a/hw/net/e1000x_regs.h b/hw/net/e1000x_regs.h index fb5b861135..bb3fb36b8d 100644 --- a/hw/net/e1000x_regs.h +++ b/hw/net/e1000x_regs.h @@ -548,6 +548,7 @@ =20 #define E1000_CTRL_EXT_ASDCHK 0x00001000 /* auto speed detection check */ #define E1000_CTRL_EXT_EE_RST 0x00002000 /* EEPROM reset */ +#define E1000_CTRL_EXT_PFRSTD 0x00004000 /* PF reset done indication */ #define E1000_CTRL_EXT_LINK_EN 0x00010000 /* enable link status from exter= nal LINK_0 and LINK_1 pins */ #define E1000_CTRL_EXT_DRV_LOAD 0x10000000 /* Driver loaded bit for FW */ #define E1000_CTRL_EXT_EIAME 0x01000000 diff --git a/hw/net/igb_core.c b/hw/net/igb_core.c index abeb9c7889..9bd53cc25f 100644 --- a/hw/net/igb_core.c +++ b/hw/net/igb_core.c @@ -1902,14 +1902,6 @@ static void igb_set_eims(IGBCore *core, int index, u= int32_t val) igb_update_interrupt_state(core); } =20 -static void igb_vf_reset(IGBCore *core, uint16_t vfn) -{ - /* TODO: Reset of the queue enable and the interrupt registers of the = VF. */ - - core->mac[V2PMAILBOX0 + vfn] &=3D ~E1000_V2PMAILBOX_RSTI; - core->mac[V2PMAILBOX0 + vfn] =3D E1000_V2PMAILBOX_RSTD; -} - static void mailbox_interrupt_to_vf(IGBCore *core, uint16_t vfn) { uint32_t ent =3D core->mac[VTIVAR_MISC + vfn]; @@ -1987,6 +1979,17 @@ static void igb_set_vfmailbox(IGBCore *core, int ind= ex, uint32_t val) } } =20 +static void igb_vf_reset(IGBCore *core, uint16_t vfn) +{ + /* disable Rx and Tx for the VF*/ + core->mac[VFTE] &=3D ~BIT(vfn); + core->mac[VFRE] &=3D ~BIT(vfn); + /* indicate VF reset to PF */ + core->mac[VFLRE] |=3D BIT(vfn); + /* VFLRE and mailbox use the same interrupt cause */ + mailbox_interrupt_to_pf(core); +} + static void igb_w1c(IGBCore *core, int index, uint32_t val) { core->mac[index] &=3D ~val; @@ -2241,14 +2244,20 @@ igb_set_status(IGBCore *core, int index, uint32_t v= al) static void igb_set_ctrlext(IGBCore *core, int index, uint32_t val) { - trace_e1000e_link_set_ext_params(!!(val & E1000_CTRL_EXT_ASDCHK), - !!(val & E1000_CTRL_EXT_SPD_BYPS)); - - /* TODO: PFRSTD */ + trace_igb_link_set_ext_params(!!(val & E1000_CTRL_EXT_ASDCHK), + !!(val & E1000_CTRL_EXT_SPD_BYPS), + !!(val & E1000_CTRL_EXT_PFRSTD)); =20 /* Zero self-clearing bits */ val &=3D ~(E1000_CTRL_EXT_ASDCHK | E1000_CTRL_EXT_EE_RST); core->mac[CTRL_EXT] =3D val; + + if (core->mac[CTRL_EXT] & E1000_CTRL_EXT_PFRSTD) { + for (int vfn =3D 0; vfn < IGB_MAX_VF_FUNCTIONS; vfn++) { + core->mac[V2PMAILBOX0 + vfn] &=3D ~E1000_V2PMAILBOX_RSTI; + core->mac[V2PMAILBOX0 + vfn] |=3D E1000_V2PMAILBOX_RSTD; + } + } } =20 static void diff --git a/hw/net/trace-events b/hw/net/trace-events index 2f791b9b57..e94172e748 100644 --- a/hw/net/trace-events +++ b/hw/net/trace-events @@ -281,6 +281,8 @@ igb_core_mdic_read_unhandled(uint32_t addr) "MDIC READ:= PHY[%u] UNHANDLED" igb_core_mdic_write(uint32_t addr, uint32_t data) "MDIC WRITE: PHY[%u] =3D= 0x%x" igb_core_mdic_write_unhandled(uint32_t addr) "MDIC WRITE: PHY[%u] UNHANDLE= D" =20 +igb_link_set_ext_params(bool asd_check, bool speed_select_bypass, bool pfr= std) "Set extended link params: ASD check: %d, Speed select bypass: %d, PF = reset done: %d" + igb_rx_desc_buff_size(uint32_t b) "buffer size: %u" igb_rx_desc_buff_write(uint64_t addr, uint16_t offset, const void* source,= uint32_t len) "addr: 0x%"PRIx64", offset: %u, from: %p, length: %u" =20 --=20 2.34.1 From nobody Fri Apr 19 00:24:54 2024 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; 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envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a01:111:f400:fe0d::730; envelope-from=sriram.yagnaraman@est.tech; helo=EUR04-HE1-obe.outbound.protection.outlook.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @estab.onmicrosoft.com) X-ZM-MESSAGEID: 1675085720390100003 Content-Type: text/plain; charset="utf-8" Also add checks for RXDCTL/TXDCTL queue enable bits Signed-off-by: Sriram Yagnaraman --- hw/net/igb_core.c | 41 ++++++++++++++++++++++++++++++----------- hw/net/igb_regs.h | 4 +++- 2 files changed, 33 insertions(+), 12 deletions(-) diff --git a/hw/net/igb_core.c b/hw/net/igb_core.c index 9bd53cc25f..b8c01cb773 100644 --- a/hw/net/igb_core.c +++ b/hw/net/igb_core.c @@ -778,6 +778,18 @@ igb_txdesc_writeback(IGBCore *core, dma_addr_t base, return igb_tx_wb_eic(core, txi->idx); } =20 +static inline bool +igb_tx_enabled(IGBCore *core, const E1000E_RingInfo *txi) +{ + bool vmdq =3D core->mac[MRQC] & 1; + uint16_t qn =3D txi->idx; + uint16_t vfn =3D qn % IGB_MAX_VM_POOLS; + + return (core->mac[TCTL] & E1000_TCTL_EN) && + (!vmdq || core->mac[VFTE] & BIT(vfn)) && + (core->mac[TXDCTL0 + (qn * 16)] & E1000_TXDCTL_QUEUE_ENABLE); +} + static void igb_start_xmit(IGBCore *core, const IGB_TxRing *txr) { @@ -787,8 +799,7 @@ igb_start_xmit(IGBCore *core, const IGB_TxRing *txr) const E1000E_RingInfo *txi =3D txr->i; uint32_t eic =3D 0; =20 - /* TODO: check if the queue itself is enabled too. */ - if (!(core->mac[TCTL] & E1000_TCTL_EN)) { + if (!igb_tx_enabled(core, txi)) { trace_e1000e_tx_disabled(); return; } @@ -1003,6 +1014,7 @@ static uint16_t igb_receive_assign(IGBCore *core, con= st struct eth_header *ehdr, queues =3D BIT(def_pl >> E1000_VT_CTL_DEFAULT_POOL_SHIFT); } =20 + queues &=3D core->mac[VFRE]; igb_rss_parse_packet(core, core->rx_pkt, external_tx !=3D NULL, rs= s_info); if (rss_info->queue & 1) { queues <<=3D 8; @@ -1486,7 +1498,7 @@ igb_receive_internal(IGBCore *core, const struct iove= c *iov, int iovcnt, static const int maximum_ethernet_hdr_len =3D (ETH_HLEN + 4); =20 uint16_t queues =3D 0; - uint32_t n; + uint32_t n =3D 0; uint8_t min_buf[ETH_ZLEN]; struct iovec min_iov; struct eth_header *ehdr; @@ -1566,26 +1578,22 @@ igb_receive_internal(IGBCore *core, const struct io= vec *iov, int iovcnt, } =20 igb_rx_ring_init(core, &rxr, i); - - trace_e1000e_rx_rss_dispatched_to_queue(rxr.i->idx); - if (!igb_has_rxbufs(core, rxr.i, total_size)) { retval =3D 0; } } =20 if (retval) { - n =3D E1000_ICR_RXT0; - igb_rx_fix_l4_csum(core, core->rx_pkt); =20 for (i =3D 0; i < IGB_NUM_QUEUES; i++) { - if (!(queues & BIT(i))) { + if (!(queues & BIT(i)) || + !(core->mac[E1000_RXDCTL(i) >> 2] & E1000_RXDCTL_QUEUE_ENA= BLE)) { continue; } =20 igb_rx_ring_init(core, &rxr, i); - + trace_e1000e_rx_rss_dispatched_to_queue(rxr.i->idx); igb_write_packet_to_guest(core, core->rx_pkt, &rxr, &rss_info); =20 /* Check if receive descriptor minimum threshold hit */ @@ -1594,6 +1602,9 @@ igb_receive_internal(IGBCore *core, const struct iove= c *iov, int iovcnt, } =20 core->mac[EICR] |=3D igb_rx_wb_eic(core, rxr.i->idx); + + /* same as RXDW (rx descriptor written back)*/ + n =3D E1000_ICR_RXT0; } =20 trace_e1000e_rx_written_to_guest(n); @@ -1981,9 +1992,16 @@ static void igb_set_vfmailbox(IGBCore *core, int ind= ex, uint32_t val) =20 static void igb_vf_reset(IGBCore *core, uint16_t vfn) { + uint16_t qn0 =3D vfn; + uint16_t qn1 =3D vfn + IGB_MAX_VF_FUNCTIONS; + /* disable Rx and Tx for the VF*/ - core->mac[VFTE] &=3D ~BIT(vfn); + core->mac[RXDCTL0 + (qn0 * 16)] &=3D ~E1000_RXDCTL_QUEUE_ENABLE; + core->mac[RXDCTL0 + (qn1 * 16)] &=3D ~E1000_RXDCTL_QUEUE_ENABLE; + core->mac[TXDCTL0 + (qn0 * 16)] &=3D ~E1000_TXDCTL_QUEUE_ENABLE; + core->mac[TXDCTL0 + (qn1 * 16)] &=3D ~E1000_TXDCTL_QUEUE_ENABLE; core->mac[VFRE] &=3D ~BIT(vfn); + core->mac[VFTE] &=3D ~BIT(vfn); /* indicate VF reset to PF */ core->mac[VFLRE] |=3D BIT(vfn); /* VFLRE and mailbox use the same interrupt cause */ @@ -3889,6 +3907,7 @@ igb_phy_reg_init[] =3D { static const uint32_t igb_mac_reg_init[] =3D { [LEDCTL] =3D 2 | (3 << 8) | BIT(15) | (6 << 16) | (7 << 24), [EEMNGCTL] =3D BIT(31), + [TXDCTL0] =3D E1000_TXDCTL_QUEUE_ENABLE, [RXDCTL0] =3D E1000_RXDCTL_QUEUE_ENABLE | (1 << 16), [RXDCTL1] =3D 1 << 16, [RXDCTL2] =3D 1 << 16, diff --git a/hw/net/igb_regs.h b/hw/net/igb_regs.h index ebf3e95023..c8ce5b1671 100644 --- a/hw/net/igb_regs.h +++ b/hw/net/igb_regs.h @@ -147,6 +147,7 @@ union e1000_adv_rx_desc { #define IGB_MAX_TX_QUEUES 8 #define IGB_MAX_VF_MC_ENTRIES 30 #define IGB_MAX_VF_FUNCTIONS 8 +#define IGB_MAX_VM_POOLS 8 #define IGB_MAX_VFTA_ENTRIES 128 #define IGB_82576_VF_DEV_ID 0x10CA #define IGB_I350_VF_DEV_ID 0x1520 @@ -160,7 +161,8 @@ union e1000_adv_rx_desc { #define E1000_MRQC_RSS_FIELD_IPV6_UDP 0x00800000 #define E1000_MRQC_RSS_FIELD_IPV6_UDP_EX 0x01000000 =20 -/* Additional Receive Descriptor Control definitions */ +/* Additional RX/TX Descriptor Control definitions */ +#define E1000_TXDCTL_QUEUE_ENABLE 0x02000000 /* Enable specific Tx Queue = */ #define E1000_RXDCTL_QUEUE_ENABLE 0x02000000 /* Enable specific Rx Queue = */ =20 /* Direct Cache Access (DCA) definitions */ --=20 2.34.1 From nobody Fri Apr 19 00:24:54 2024 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; 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envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a01:111:f400:fe0d::730; envelope-from=sriram.yagnaraman@est.tech; helo=EUR04-HE1-obe.outbound.protection.outlook.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @estab.onmicrosoft.com) X-ZM-MESSAGEID: 1675085722411100005 Content-Type: text/plain; charset="utf-8" IGB uses RXDW ICR bit to indicate that rx descriptor has been written back. This is the same as RXT0 bit in older HW. Signed-off-by: Sriram Yagnaraman --- hw/net/e1000x_regs.h | 4 ++++ hw/net/igb_core.c | 28 ++++++++++++++-------------- 2 files changed, 18 insertions(+), 14 deletions(-) diff --git a/hw/net/e1000x_regs.h b/hw/net/e1000x_regs.h index bb3fb36b8d..3a3431d878 100644 --- a/hw/net/e1000x_regs.h +++ b/hw/net/e1000x_regs.h @@ -335,6 +335,7 @@ #define E1000_ICR_RXDMT0 0x00000010 /* rx desc min. threshold (0) */ #define E1000_ICR_RXO 0x00000040 /* rx overrun */ #define E1000_ICR_RXT0 0x00000080 /* rx timer intr (ring 0) */ +#define E1000_ICR_RXDW 0x00000080 /* rx desc written back */ #define E1000_ICR_MDAC 0x00000200 /* MDIO access complete */ #define E1000_ICR_RXCFG 0x00000400 /* RX /c/ ordered set */ #define E1000_ICR_GPI_EN0 0x00000800 /* GP Int 0 */ @@ -378,6 +379,7 @@ #define E1000_ICS_RXDMT0 E1000_ICR_RXDMT0 /* rx desc min. threshold = */ #define E1000_ICS_RXO E1000_ICR_RXO /* rx overrun */ #define E1000_ICS_RXT0 E1000_ICR_RXT0 /* rx timer intr */ +#define E1000_ICS_RXDW E1000_ICR_RXDW /* rx desc written back */ #define E1000_ICS_MDAC E1000_ICR_MDAC /* MDIO access complete */ #define E1000_ICS_RXCFG E1000_ICR_RXCFG /* RX /c/ ordered set */ #define E1000_ICS_GPI_EN0 E1000_ICR_GPI_EN0 /* GP Int 0 */ @@ -407,6 +409,7 @@ #define E1000_IMS_RXDMT0 E1000_ICR_RXDMT0 /* rx desc min. threshold = */ #define E1000_IMS_RXO E1000_ICR_RXO /* rx overrun */ #define E1000_IMS_RXT0 E1000_ICR_RXT0 /* rx timer intr */ +#define E1000_IMS_RXDW E1000_ICR_RXDW /* rx desc written back */ #define E1000_IMS_MDAC E1000_ICR_MDAC /* MDIO access complete */ #define E1000_IMS_RXCFG E1000_ICR_RXCFG /* RX /c/ ordered set */ #define E1000_IMS_GPI_EN0 E1000_ICR_GPI_EN0 /* GP Int 0 */ @@ -441,6 +444,7 @@ #define E1000_IMC_RXDMT0 E1000_ICR_RXDMT0 /* rx desc min. threshold = */ #define E1000_IMC_RXO E1000_ICR_RXO /* rx overrun */ #define E1000_IMC_RXT0 E1000_ICR_RXT0 /* rx timer intr */ +#define E1000_IMC_RXDW E1000_ICR_RXDW /* rx desc written back */ #define E1000_IMC_MDAC E1000_ICR_MDAC /* MDIO access complete */ #define E1000_IMC_RXCFG E1000_ICR_RXCFG /* RX /c/ ordered set */ #define E1000_IMC_GPI_EN0 E1000_ICR_GPI_EN0 /* GP Int 0 */ diff --git a/hw/net/igb_core.c b/hw/net/igb_core.c index b8c01cb773..cea7c036f0 100644 --- a/hw/net/igb_core.c +++ b/hw/net/igb_core.c @@ -1498,7 +1498,7 @@ igb_receive_internal(IGBCore *core, const struct iove= c *iov, int iovcnt, static const int maximum_ethernet_hdr_len =3D (ETH_HLEN + 4); =20 uint16_t queues =3D 0; - uint32_t n =3D 0; + uint32_t icr_bits =3D 0; uint8_t min_buf[ETH_ZLEN]; struct iovec min_iov; struct eth_header *ehdr; @@ -1508,7 +1508,7 @@ igb_receive_internal(IGBCore *core, const struct iove= c *iov, int iovcnt, E1000E_RxRing rxr; E1000E_RSSInfo rss_info; size_t total_size; - ssize_t retval; + ssize_t retval =3D 0; int i; =20 trace_e1000e_rx_receive_iov(iovcnt); @@ -1570,8 +1570,6 @@ igb_receive_internal(IGBCore *core, const struct iove= c *iov, int iovcnt, total_size =3D net_rx_pkt_get_total_len(core->rx_pkt) + e1000x_fcs_len(core->mac); =20 - retval =3D orig_size; - for (i =3D 0; i < IGB_NUM_QUEUES; i++) { if (!(queues & BIT(i))) { continue; @@ -1579,11 +1577,12 @@ igb_receive_internal(IGBCore *core, const struct io= vec *iov, int iovcnt, =20 igb_rx_ring_init(core, &rxr, i); if (!igb_has_rxbufs(core, rxr.i, total_size)) { - retval =3D 0; + icr_bits |=3D E1000_ICS_RXO; } } =20 - if (retval) { + if (!icr_bits) { + retval =3D orig_size; igb_rx_fix_l4_csum(core, core->rx_pkt); =20 for (i =3D 0; i < IGB_NUM_QUEUES; i++) { @@ -1593,28 +1592,29 @@ igb_receive_internal(IGBCore *core, const struct io= vec *iov, int iovcnt, } =20 igb_rx_ring_init(core, &rxr, i); + trace_e1000e_rx_rss_dispatched_to_queue(rxr.i->idx); igb_write_packet_to_guest(core, core->rx_pkt, &rxr, &rss_info); =20 /* Check if receive descriptor minimum threshold hit */ if (igb_rx_descr_threshold_hit(core, rxr.i)) { - n |=3D E1000_ICS_RXDMT0; + icr_bits |=3D E1000_ICS_RXDMT0; } =20 core->mac[EICR] |=3D igb_rx_wb_eic(core, rxr.i->idx); =20 - /* same as RXDW (rx descriptor written back)*/ - n =3D E1000_ICR_RXT0; + icr_bits |=3D E1000_ICR_RXDW; } + } =20 - trace_e1000e_rx_written_to_guest(n); + if (icr_bits & E1000_ICR_RXDW) { + trace_e1000e_rx_written_to_guest(icr_bits); } else { - n =3D E1000_ICS_RXO; - trace_e1000e_rx_not_written_to_guest(n); + trace_e1000e_rx_not_written_to_guest(icr_bits); } =20 - trace_e1000e_rx_interrupt_set(n); - igb_set_interrupt_cause(core, n); + trace_e1000e_rx_interrupt_set(icr_bits); 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envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a01:111:f400:fe0d::730; envelope-from=sriram.yagnaraman@est.tech; helo=EUR04-HE1-obe.outbound.protection.outlook.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @estab.onmicrosoft.com) X-ZM-MESSAGEID: 1675085748564100003 Content-Type: text/plain; charset="utf-8" Signed-off-by: Sriram Yagnaraman --- hw/net/igb_core.c | 48 +++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 40 insertions(+), 8 deletions(-) diff --git a/hw/net/igb_core.c b/hw/net/igb_core.c index cea7c036f0..89650fcfd4 100644 --- a/hw/net/igb_core.c +++ b/hw/net/igb_core.c @@ -910,12 +910,27 @@ igb_rx_l4_cso_enabled(IGBCore *core) return !!(core->mac[RXCSUM] & E1000_RXCSUM_TUOFLD); } =20 +static bool +igb_rx_is_oversized(IGBCore *core, uint16_t qn, size_t size) +{ + uint16_t pool =3D qn % IGB_MAX_VM_POOLS; + bool lpe =3D !!(core->mac[VMOLR0 + pool] & E1000_VMOLR_LPE); + int maximum_ethernet_lpe_size =3D + core->mac[VMOLR0 + pool] & E1000_VMOLR_RLPML_MASK; + int maximum_ethernet_vlan_size =3D 1522; + + return (size > maximum_ethernet_lpe_size || + (size > maximum_ethernet_vlan_size && !lpe)); +} + static uint16_t igb_receive_assign(IGBCore *core, const struct eth_header = *ehdr, - E1000E_RSSInfo *rss_info, bool *externa= l_tx) + size_t size, E1000E_RSSInfo *rss_info, + bool *external_tx) { static const int ta_shift[] =3D { 4, 3, 2, 0 }; uint32_t f, ra[2], *macp, rctl =3D core->mac[RCTL]; uint16_t queues =3D 0; + uint16_t oversized =3D 0; uint16_t vid =3D lduw_be_p(&PKT_GET_VLAN_HDR(ehdr)->h_tci) & VLAN_VID_= MASK; bool accepted =3D false; int i; @@ -941,7 +956,7 @@ static uint16_t igb_receive_assign(IGBCore *core, const= struct eth_header *ehdr, =20 if (core->mac[MRQC] & 1) { if (is_broadcast_ether_addr(ehdr->h_dest)) { - for (i =3D 0; i < 8; i++) { + for (i =3D 0; i < IGB_MAX_VM_POOLS; i++) { if (core->mac[VMOLR0 + i] & E1000_VMOLR_BAM) { queues |=3D BIT(i); } @@ -975,7 +990,7 @@ static uint16_t igb_receive_assign(IGBCore *core, const= struct eth_header *ehdr, f =3D ta_shift[(rctl >> E1000_RCTL_MO_SHIFT) & 3]; f =3D (((ehdr->h_dest[5] << 8) | ehdr->h_dest[4]) >> f) & = 0xfff; if (macp[f >> 5] & (1 << (f & 0x1f))) { - for (i =3D 0; i < 8; i++) { + for (i =3D 0; i < IGB_MAX_VM_POOLS; i++) { if (core->mac[VMOLR0 + i] & E1000_VMOLR_ROMPE) { queues |=3D BIT(i); } @@ -998,7 +1013,7 @@ static uint16_t igb_receive_assign(IGBCore *core, cons= t struct eth_header *ehdr, } } } else { - for (i =3D 0; i < 8; i++) { + for (i =3D 0; i < IGB_MAX_VM_POOLS; i++) { if (core->mac[VMOLR0 + i] & E1000_VMOLR_AUPE) { mask |=3D BIT(i); } @@ -1015,9 +1030,26 @@ static uint16_t igb_receive_assign(IGBCore *core, co= nst struct eth_header *ehdr, } =20 queues &=3D core->mac[VFRE]; - igb_rss_parse_packet(core, core->rx_pkt, external_tx !=3D NULL, rs= s_info); - if (rss_info->queue & 1) { - queues <<=3D 8; + if (queues) { + for (i =3D 0; i < IGB_MAX_VM_POOLS; i++) { + if ((queues & BIT(i)) && igb_rx_is_oversized(core, i, size= )) { + oversized |=3D BIT(i); + } + } + /* 8.19.37 increment ROC if packet is oversized for all queues= */ + if (oversized =3D=3D queues) { + trace_e1000x_rx_oversized(size); + e1000x_inc_reg_if_not_full(core->mac, ROC); + } + queues &=3D ~oversized; + } + + if (queues) { + igb_rss_parse_packet(core, core->rx_pkt, + external_tx !=3D NULL, rss_info); + if (rss_info->queue & 1) { + queues <<=3D 8; + } } } else { switch (net_rx_pkt_get_packet_type(core->rx_pkt)) { @@ -1561,7 +1593,7 @@ igb_receive_internal(IGBCore *core, const struct iove= c *iov, int iovcnt, e1000x_vlan_enabled(core->mac), core->mac[VET] & 0xffff); =20 - queues =3D igb_receive_assign(core, ehdr, &rss_info, external_tx); + queues =3D igb_receive_assign(core, ehdr, size, &rss_info, external_tx= ); if (!queues) { trace_e1000e_rx_flt_dropped(); return orig_size; 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envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a01:111:f400:fe0d::730; envelope-from=sriram.yagnaraman@est.tech; helo=EUR04-HE1-obe.outbound.protection.outlook.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @estab.onmicrosoft.com) X-ZM-MESSAGEID: 1675085778694100007 Content-Type: text/plain; charset="utf-8" RSS for VFs is only enabled if VMOLR[n].RSSE is set. Signed-off-by: Sriram Yagnaraman --- hw/net/igb_core.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/hw/net/igb_core.c b/hw/net/igb_core.c index 89650fcfd4..b41b1a5d21 100644 --- a/hw/net/igb_core.c +++ b/hw/net/igb_core.c @@ -1047,8 +1047,15 @@ static uint16_t igb_receive_assign(IGBCore *core, co= nst struct eth_header *ehdr, if (queues) { igb_rss_parse_packet(core, core->rx_pkt, external_tx !=3D NULL, rss_info); + /* Sec 8.26.1: PQn =3D VFn + VQn*8 */ if (rss_info->queue & 1) { - queues <<=3D 8; + for (i =3D 0; i < IGB_MAX_VM_POOLS; i++) { + if ((queues & BIT(i)) && + (core->mac[VMOLR0 + i] & E1000_VMOLR_RSSE)) { + queues |=3D BIT(i + IGB_MAX_VM_POOLS); + queues &=3D ~BIT(i); + } + } } } } else { --=20 2.34.1 From nobody Fri Apr 19 00:24:54 2024 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; 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envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2a01:111:f400:fe0d::730; envelope-from=sriram.yagnaraman@est.tech; helo=EUR04-HE1-obe.outbound.protection.outlook.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @estab.onmicrosoft.com) X-ZM-MESSAGEID: 1675085744628100003 Content-Type: text/plain; charset="utf-8" Please note that loopback counters for VM to VM traffic is not implemented yet: VFGOTLBC, VFGPTLBC, VFGORLBC and VFGPRLBC. Signed-off-by: Sriram Yagnaraman --- hw/net/igb_core.c | 26 ++++++++++++++++++++++---- 1 file changed, 22 insertions(+), 4 deletions(-) diff --git a/hw/net/igb_core.c b/hw/net/igb_core.c index b41b1a5d21..89cad57cb8 100644 --- a/hw/net/igb_core.c +++ b/hw/net/igb_core.c @@ -488,7 +488,7 @@ igb_tx_pkt_send(IGBCore *core, struct igb_tx *tx, int q= ueue_index) } =20 static void -igb_on_tx_done_update_stats(IGBCore *core, struct NetTxPkt *tx_pkt) +igb_on_tx_done_update_stats(IGBCore *core, struct NetTxPkt *tx_pkt, int qn) { static const int PTCregs[6] =3D { PTC64, PTC127, PTC255, PTC511, PTC1023, PTC1522 }; @@ -515,6 +515,13 @@ igb_on_tx_done_update_stats(IGBCore *core, struct NetT= xPkt *tx_pkt) core->mac[GPTC] =3D core->mac[TPT]; core->mac[GOTCL] =3D core->mac[TOTL]; core->mac[GOTCH] =3D core->mac[TOTH]; + + if (core->mac[MRQC] & 1) { + uint16_t pool =3D qn % IGB_MAX_VM_POOLS; + + core->mac[PVFGOTC0 + (pool * 64)] +=3D tot_len; + core->mac[PVFGPTC0 + (pool * 64)]++; + } } =20 static void @@ -577,7 +584,7 @@ igb_process_tx_desc(IGBCore *core, core->mac[VET] & 0xffff); } if (igb_tx_pkt_send(core, tx, queue_index)) { - igb_on_tx_done_update_stats(core, tx->tx_pkt); + igb_on_tx_done_update_stats(core, tx->tx_pkt, queue_index); } } =20 @@ -1394,7 +1401,8 @@ igb_write_to_rx_buffers(IGBCore *core, } =20 static void -igb_update_rx_stats(IGBCore *core, size_t data_size, size_t data_fcs_size) +igb_update_rx_stats(IGBCore *core, const E1000E_RingInfo *rxi, + size_t data_size, size_t data_fcs_size) { e1000x_update_rx_total_stats(core->mac, data_size, data_fcs_size); =20 @@ -1410,6 +1418,16 @@ igb_update_rx_stats(IGBCore *core, size_t data_size,= size_t data_fcs_size) default: break; } + + if (core->mac[MRQC] & 1) { + uint16_t pool =3D rxi->idx % IGB_MAX_VM_POOLS; + + core->mac[PVFGORC0 + (pool * 64)] +=3D data_size + 4; + core->mac[PVFGPRC0 + (pool * 64)]++; + if (net_rx_pkt_get_packet_type(core->rx_pkt) =3D=3D ETH_PKT_MCAST)= { + core->mac[PVFMPRC0 + (pool * 64)]++; + } + } } =20 static inline bool @@ -1511,7 +1529,7 @@ igb_write_packet_to_guest(IGBCore *core, struct NetRx= Pkt *pkt, =20 } while (desc_offset < total_size); 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envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=40.107.7.137; envelope-from=sriram.yagnaraman@est.tech; helo=EUR04-HE1-obe.outbound.protection.outlook.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @estab.onmicrosoft.com) X-ZM-MESSAGEID: 1675086310650100005 Content-Type: text/plain; charset="utf-8" Also trace out a warning if replication mode is disabled, since we only support replication mode enabled. Signed-off-by: Sriram Yagnaraman --- hw/net/igb_core.c | 9 +++++++++ hw/net/trace-events | 2 ++ 2 files changed, 11 insertions(+) diff --git a/hw/net/igb_core.c b/hw/net/igb_core.c index 89cad57cb8..5ca666229e 100644 --- a/hw/net/igb_core.c +++ b/hw/net/igb_core.c @@ -962,6 +962,10 @@ static uint16_t igb_receive_assign(IGBCore *core, cons= t struct eth_header *ehdr, } =20 if (core->mac[MRQC] & 1) { + if (!(core->mac[VT_CTL] & E1000_VT_CTL_VM_REPL_EN)) { + trace_igb_rx_vmdq_replication_mode_disabled(); + } + if (is_broadcast_ether_addr(ehdr->h_dest)) { for (i =3D 0; i < IGB_MAX_VM_POOLS; i++) { if (core->mac[VMOLR0 + i] & E1000_VMOLR_BAM) { @@ -1008,6 +1012,11 @@ static uint16_t igb_receive_assign(IGBCore *core, co= nst struct eth_header *ehdr, } } =20 + /* assume a full pool list if IGMAC is set */ + if (core->mac[VT_CTL] & E1000_VT_CTL_IGNORE_MAC) { + queues =3D BIT(IGB_MAX_VF_FUNCTIONS) - 1; + } + if (e1000x_vlan_rx_filter_enabled(core->mac)) { uint16_t mask =3D 0; =20 diff --git a/hw/net/trace-events b/hw/net/trace-events index e94172e748..9bc7658692 100644 --- a/hw/net/trace-events +++ b/hw/net/trace-events @@ -288,6 +288,8 @@ igb_rx_desc_buff_write(uint64_t addr, uint16_t offset, = const void* source, uint3 =20 igb_rx_metadata_rss(uint32_t rss) "RSS data: 0x%X" =20 +igb_rx_vmdq_replication_mode_disabled(void) "WARN: Only replication mode e= nabled is supported" + igb_irq_icr_clear_gpie_nsicr(void) "Clearing ICR on read due to GPIE.NSICR= enabled" igb_irq_icr_write(uint32_t bits, uint32_t old_icr, uint32_t new_icr) "Clea= ring ICR bits 0x%x: 0x%x --> 0x%x" igb_irq_set_iam(uint32_t icr) "Update IAM: 0x%x" --=20 2.34.1 From nobody Fri Apr 19 00:24:54 2024 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; 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envelope-from=qemu-devel-bounces+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=40.107.7.137; envelope-from=sriram.yagnaraman@est.tech; helo=EUR04-HE1-obe.outbound.protection.outlook.com X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @estab.onmicrosoft.com) X-ZM-MESSAGEID: 1675085996752100001 Content-Type: text/plain; charset="utf-8" Add support for stripping/inserting VLAN for VFs. Signed-off-by: Sriram Yagnaraman --- hw/net/igb_core.c | 84 ++++++++++++++++++++++++++++++----------------- 1 file changed, 54 insertions(+), 30 deletions(-) diff --git a/hw/net/igb_core.c b/hw/net/igb_core.c index 5ca666229e..a511c64773 100644 --- a/hw/net/igb_core.c +++ b/hw/net/igb_core.c @@ -384,6 +384,25 @@ igb_rss_parse_packet(IGBCore *core, struct NetRxPkt *p= kt, bool tx, info->queue =3D E1000_RSS_QUEUE(&core->mac[RETA], info->hash); } =20 +static inline bool +igb_tx_insert_vlan(IGBCore *core, uint16_t qn, + struct igb_tx *tx, bool desc_vle) +{ + if (core->mac[MRQC] & 1) { + uint16_t pool =3D qn % IGB_MAX_VM_POOLS; + + if (core->mac[VMVIR0 + pool] & E1000_VMVIR_VLANA_DEFAULT) { + /* always insert default VLAN */ + desc_vle =3D true; + tx->vlan =3D core->mac[VMVIR0 + pool] & 0xffff; + } else if (core->mac[VMVIR0 + pool] & E1000_VMVIR_VLANA_NEVER) { + return false; + } + } + + return desc_vle && e1000x_vlan_enabled(core->mac); +} + static bool igb_setup_tx_offloads(IGBCore *core, struct igb_tx *tx) { @@ -579,7 +598,8 @@ igb_process_tx_desc(IGBCore *core, =20 if (cmd_type_len & E1000_TXD_CMD_EOP) { if (!tx->skip_cp && net_tx_pkt_parse(tx->tx_pkt)) { - if (cmd_type_len & E1000_TXD_CMD_VLE) { + if (igb_tx_insert_vlan(core, queue_index, tx, + !!(cmd_type_len & E1000_TXD_CMD_VLE))) { net_tx_pkt_setup_vlan_header_ex(tx->tx_pkt, tx->vlan, core->mac[VET] & 0xffff); } @@ -1541,6 +1561,19 @@ igb_write_packet_to_guest(IGBCore *core, struct NetR= xPkt *pkt, igb_update_rx_stats(core, rxi, size, total_size); } =20 +static bool +igb_rx_strip_vlan(IGBCore *core, const E1000E_RingInfo *rxi) +{ + if (core->mac[MRQC] & 1) { + uint16_t pool =3D rxi->idx % IGB_MAX_VM_POOLS; + return (net_rx_pkt_get_packet_type(core->rx_pkt) =3D=3D ETH_PKT_MC= AST) ? + core->mac[RPLOLR] & E1000_RPLOLR_STRVLAN : + core->mac[VMOLR0 + pool] & E1000_VMOLR_STRVLAN; + } + + return e1000x_vlan_enabled(core->mac); +} + static inline void igb_rx_fix_l4_csum(IGBCore *core, struct NetRxPkt *pkt) { @@ -1622,10 +1655,7 @@ igb_receive_internal(IGBCore *core, const struct iov= ec *iov, int iovcnt, =20 ehdr =3D PKT_GET_ETH_HDR(filter_buf); net_rx_pkt_set_packet_type(core->rx_pkt, get_eth_packet_type(ehdr)); - - net_rx_pkt_attach_iovec_ex(core->rx_pkt, iov, iovcnt, iov_ofs, - e1000x_vlan_enabled(core->mac), - core->mac[VET] & 0xffff); + net_rx_pkt_set_protocols(core->rx_pkt, filter_buf, size); =20 queues =3D igb_receive_assign(core, ehdr, size, &rss_info, external_tx= ); if (!queues) { @@ -1633,44 +1663,38 @@ igb_receive_internal(IGBCore *core, const struct io= vec *iov, int iovcnt, return orig_size; } =20 - total_size =3D net_rx_pkt_get_total_len(core->rx_pkt) + - e1000x_fcs_len(core->mac); + retval =3D orig_size; + total_size =3D size + e1000x_fcs_len(core->mac); =20 for (i =3D 0; i < IGB_NUM_QUEUES; i++) { - if (!(queues & BIT(i))) { + if (!(queues & BIT(i)) && + !(core->mac[RXDCTL0 + (i * 16)] & E1000_RXDCTL_QUEUE_ENABLE)) { continue; } =20 igb_rx_ring_init(core, &rxr, i); + net_rx_pkt_attach_iovec_ex(core->rx_pkt, iov, iovcnt, iov_ofs, + igb_rx_strip_vlan(core, rxr.i), + core->mac[VET] & 0xffff); + igb_rx_fix_l4_csum(core, core->rx_pkt); + if (!igb_has_rxbufs(core, rxr.i, total_size)) { icr_bits |=3D E1000_ICS_RXO; + continue; } - } =20 - if (!icr_bits) { - retval =3D orig_size; - igb_rx_fix_l4_csum(core, core->rx_pkt); - - for (i =3D 0; i < IGB_NUM_QUEUES; i++) { - if (!(queues & BIT(i)) || - !(core->mac[E1000_RXDCTL(i) >> 2] & E1000_RXDCTL_QUEUE_ENA= BLE)) { - continue; - } - - igb_rx_ring_init(core, &rxr, i); + trace_e1000e_rx_rss_dispatched_to_queue(rxr.i->idx); + igb_write_packet_to_guest(core, core->rx_pkt, &rxr, &rss_info); =20 - trace_e1000e_rx_rss_dispatched_to_queue(rxr.i->idx); - igb_write_packet_to_guest(core, core->rx_pkt, &rxr, &rss_info); - - /* Check if receive descriptor minimum threshold hit */ - if (igb_rx_descr_threshold_hit(core, rxr.i)) { - icr_bits |=3D E1000_ICS_RXDMT0; - } + /* Check if receive descriptor minimum threshold hit */ + if (igb_rx_descr_threshold_hit(core, rxr.i)) { + icr_bits |=3D E1000_ICS_RXDMT0; + } =20 - core->mac[EICR] |=3D igb_rx_wb_eic(core, rxr.i->idx); + core->mac[EICR] |=3D igb_rx_wb_eic(core, rxr.i->idx); =20 - icr_bits |=3D E1000_ICR_RXDW; - } + /* same as RXDW (rx descriptor written back)*/ + icr_bits |=3D E1000_ICR_RXDW; } =20 if (icr_bits & E1000_ICR_RXDW) { --=20 2.34.1