Date: Tue, 17 Aug 2021 18:34:24 GMT From: John Baldwin <jhb@FreeBSD.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-main@FreeBSD.org Subject: git: cbc186360c65 - main - cxgbei: Restructure how PDU limits are managed. Message-ID: <202108171834.17HIYOjv061759@gitrepo.freebsd.org>
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The branch main has been updated by jhb: URL: https://cgit.FreeBSD.org/src/commit/?id=cbc186360c658eda884ed97f37cdc2d1b6512b91 commit cbc186360c658eda884ed97f37cdc2d1b6512b91 Author: John Baldwin <jhb@FreeBSD.org> AuthorDate: 2021-08-17 18:14:11 +0000 Commit: John Baldwin <jhb@FreeBSD.org> CommitDate: 2021-08-17 18:14:11 +0000 cxgbei: Restructure how PDU limits are managed. - Compute data segment limits in read_pdu_limits() rather than PDU length limits. - Add back connection-specific PDU overhead lengths to compute PDU length limits in icl_cxgbei_conn_handoff(). Reviewed by: np Sponsored by: Chelsio Communications Differential Revision: https://reviews.freebsd.org/D31574 --- sys/dev/cxgbe/cxgbei/cxgbei.c | 19 ++++++++++++++----- sys/dev/cxgbe/cxgbei/cxgbei.h | 4 ++-- sys/dev/cxgbe/cxgbei/icl_cxgbei.c | 30 ++++++++++++++++++------------ 3 files changed, 34 insertions(+), 19 deletions(-) diff --git a/sys/dev/cxgbe/cxgbei/cxgbei.c b/sys/dev/cxgbe/cxgbei/cxgbei.c index 5cce7d3fce05..24187c862fe6 100644 --- a/sys/dev/cxgbe/cxgbei/cxgbei.c +++ b/sys/dev/cxgbe/cxgbei/cxgbei.c @@ -97,8 +97,8 @@ static struct cxgbei_worker_thread_softc *cwt_softc; static struct proc *cxgbei_proc; static void -read_pdu_limits(struct adapter *sc, uint32_t *max_tx_pdu_len, - uint32_t *max_rx_pdu_len) +read_pdu_limits(struct adapter *sc, uint32_t *max_tx_data_len, + uint32_t *max_rx_data_len) { uint32_t tx_len, rx_len, r, v; @@ -114,8 +114,17 @@ read_pdu_limits(struct adapter *sc, uint32_t *max_tx_pdu_len, rx_len = min(rx_len, v); tx_len = min(tx_len, v); - *max_tx_pdu_len = rounddown2(tx_len, 512); - *max_rx_pdu_len = rounddown2(rx_len, 512); + /* + * AHS is not supported by the kernel so we'll not account for + * it either in our PDU len -> data segment len conversions. + */ + rx_len -= ISCSI_BHS_SIZE + ISCSI_HEADER_DIGEST_SIZE + + ISCSI_DATA_DIGEST_SIZE; + tx_len -= ISCSI_BHS_SIZE + ISCSI_HEADER_DIGEST_SIZE + + ISCSI_DATA_DIGEST_SIZE; + + *max_tx_data_len = rounddown2(tx_len, 512); + *max_rx_data_len = rounddown2(rx_len, 512); } /* @@ -135,7 +144,7 @@ cxgbei_init(struct adapter *sc, struct cxgbei_data *ci) MPASS(sc->vres.iscsi.size > 0); MPASS(ci != NULL); - read_pdu_limits(sc, &ci->max_tx_pdu_len, &ci->max_rx_pdu_len); + read_pdu_limits(sc, &ci->max_tx_data_len, &ci->max_rx_data_len); pr = &ci->pr; r = t4_read_reg(sc, A_ULP_RX_ISCSI_PSZ); diff --git a/sys/dev/cxgbe/cxgbei/cxgbei.h b/sys/dev/cxgbe/cxgbei/cxgbei.h index 433f15b743fe..20754fa893a8 100644 --- a/sys/dev/cxgbe/cxgbei/cxgbei.h +++ b/sys/dev/cxgbe/cxgbei/cxgbei.h @@ -125,8 +125,8 @@ ip_to_icp(struct icl_pdu *ip) } struct cxgbei_data { - u_int max_tx_pdu_len; - u_int max_rx_pdu_len; + u_int max_tx_data_len; + u_int max_rx_data_len; u_int ddp_threshold; struct ppod_region pr; diff --git a/sys/dev/cxgbe/cxgbei/icl_cxgbei.c b/sys/dev/cxgbe/cxgbei/icl_cxgbei.c index 5526388915f7..a6e7f8b95815 100644 --- a/sys/dev/cxgbe/cxgbei/icl_cxgbei.c +++ b/sys/dev/cxgbe/cxgbei/icl_cxgbei.c @@ -783,6 +783,7 @@ icl_cxgbei_conn_handoff(struct icl_conn *ic, int fd) struct tcpcb *tp; struct toepcb *toep; cap_rights_t rights; + u_int max_rx_pdu_len, max_tx_pdu_len; int error, max_iso_pdus; MPASS(icc->icc_signature == CXGBEI_CONN_SIGNATURE); @@ -828,6 +829,17 @@ icl_cxgbei_conn_handoff(struct icl_conn *ic, int fd) icc->sc = fa.sc; ci = icc->sc->iscsi_ulp_softc; + max_rx_pdu_len = ISCSI_BHS_SIZE + ic->ic_max_recv_data_segment_length; + max_tx_pdu_len = ISCSI_BHS_SIZE + ic->ic_max_send_data_segment_length; + if (ic->ic_header_crc32c) { + max_rx_pdu_len += ISCSI_HEADER_DIGEST_SIZE; + max_tx_pdu_len += ISCSI_HEADER_DIGEST_SIZE; + } + if (ic->ic_data_crc32c) { + max_rx_pdu_len += ISCSI_DATA_DIGEST_SIZE; + max_tx_pdu_len += ISCSI_DATA_DIGEST_SIZE; + } + inp = sotoinpcb(so); INP_WLOCK(inp); tp = intotcpcb(inp); @@ -853,7 +865,7 @@ icl_cxgbei_conn_handoff(struct icl_conn *ic, int fd) if (icc->sc->tt.iso && chip_id(icc->sc) >= CHELSIO_T5) { max_iso_pdus = CXGBEI_MAX_ISO_PAYLOAD / - ci->max_tx_pdu_len; + max_tx_pdu_len; ic->ic_hw_isomax = max_iso_pdus * ic->ic_max_send_data_segment_length; } else @@ -864,15 +876,15 @@ icl_cxgbei_conn_handoff(struct icl_conn *ic, int fd) toep->ulpcb = icc; send_iscsi_flowc_wr(icc->sc, toep, - roundup(max_iso_pdus * ci->max_tx_pdu_len, tp->t_maxseg)); + roundup(max_iso_pdus * max_tx_pdu_len, tp->t_maxseg)); set_ulp_mode_iscsi(icc->sc, toep, icc->ulp_submode); error = 0; } INP_WUNLOCK(inp); if (error == 0) { - error = icl_cxgbei_setsockopt(ic, so, ci->max_tx_pdu_len, - ci->max_rx_pdu_len); + error = icl_cxgbei_setsockopt(ic, so, max_tx_pdu_len, + max_rx_pdu_len); } return (error); @@ -1378,18 +1390,12 @@ cxgbei_limits(struct adapter *sc, void *arg) ci = sc->iscsi_ulp_softc; MPASS(ci != NULL); - /* - * AHS is not supported by the kernel so we'll not account for - * it either in our PDU len -> data segment len conversions. - */ - max_dsl = ci->max_rx_pdu_len - ISCSI_BHS_SIZE - - ISCSI_HEADER_DIGEST_SIZE - ISCSI_DATA_DIGEST_SIZE; + max_dsl = ci->max_rx_data_len; if (idl->idl_max_recv_data_segment_length > max_dsl) idl->idl_max_recv_data_segment_length = max_dsl; - max_dsl = ci->max_tx_pdu_len - ISCSI_BHS_SIZE - - ISCSI_HEADER_DIGEST_SIZE - ISCSI_DATA_DIGEST_SIZE; + max_dsl = ci->max_tx_data_len; if (idl->idl_max_send_data_segment_length > max_dsl) idl->idl_max_send_data_segment_length = max_dsl; }
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