From: jmatthew Date: Tue, 30 May 2017 14:04:02 +0000 (+0000) Subject: Remove comments about implementing FIS-based switching with port multipliers, X-Git-Url: http://artulab.com/gitweb/?a=commitdiff_plain;h=6f1d62e95432c21e41a3685f237d8a8ff386e5cf;p=openbsd Remove comments about implementing FIS-based switching with port multipliers, which we can safely assume isn't going to happen now. No code changes. --- diff --git a/sys/dev/ic/ahci.c b/sys/dev/ic/ahci.c index 699e482d71b..9057d44ff78 100644 --- a/sys/dev/ic/ahci.c +++ b/sys/dev/ic/ahci.c @@ -1,4 +1,4 @@ -/* $OpenBSD: ahci.c,v 1.29 2017/03/05 09:55:16 jmatthew Exp $ */ +/* $OpenBSD: ahci.c,v 1.30 2017/05/30 14:04:02 jmatthew Exp $ */ /* * Copyright (c) 2006 David Gwynne @@ -280,15 +280,6 @@ noccc: sc->sc_ncmds > 2 && (sc->sc_cap & AHCI_REG_CAP_SNCQ)) { aaa.aaa_capability |= ASAA_CAP_NCQ | ASAA_CAP_PMP_NCQ; - /* XXX enabling ASAA_CAP_PMP_NCQ with FBS: - * - some error recovery work required (single device vs port - * errors) - * - probably need to look at storing our active ccb queue - * differently so we can group ncq and non-ncq commands - * for different ports. as long as we preserve the order for - * each port, we can reorder commands to get more ncq - * commands to run in parallel. - */ } sc->sc_atascsi = atascsi_attach(&sc->sc_dev, &aaa); @@ -516,11 +507,6 @@ ahci_port_alloc(struct ahci_softc *sc, u_int port) ahci_pwrite(ap, AHCI_PREG_SCTL, 0); } - /* XXX FBS - need to allocate 16x ahci_rfis struct? - but we don't - * know if there's a PMP attached or if the HBA supports FBS yet.. - * reallocate when we enable FBS? - */ - /* Allocate RFIS */ ap->ap_dmamem_rfis = ahci_dmamem_alloc(sc, sizeof(struct ahci_rfis)); if (ap->ap_dmamem_rfis == NULL) @@ -872,8 +858,6 @@ ahci_default_port_start(struct ahci_port *ap, int fre_only) { u_int32_t r; - /* XXX FBS: possibly turn FBS on here */ - /* Turn on FRE (and ST) */ r = ahci_pread(ap, AHCI_PREG_CMD) & ~AHCI_PREG_CMD_ICC; r |= AHCI_PREG_CMD_FRE; @@ -928,8 +912,6 @@ ahci_port_stop(struct ahci_port *ap, int stop_fis_rx) ahci_pwait_clr(ap, AHCI_PREG_CMD, AHCI_PREG_CMD_FR, 1)) return (2); - /* XXX FBS: possibly disable FBS here? */ - return (0); } @@ -995,10 +977,6 @@ ahci_port_softreset(struct ahci_port *ap) /* Clear port errors to permit TFD transfer */ ahci_pwrite(ap, AHCI_PREG_SERR, ahci_pread(ap, AHCI_PREG_SERR)); - /* XXX FBS - need to ensure we don't enable FBS here, since we're - * resetting stuff - * (AHCI spec 9.3.8) - */ /* Restart port */ if (ahci_port_start(ap, 0)) { printf("%s: failed to start port, cannot softreset\n", @@ -1087,10 +1065,6 @@ ahci_pmp_port_softreset(struct ahci_port *ap, int pmp_port) struct ahci_cmd_hdr *cmd_slot; u_int8_t *fis; - /* XXX FBS: ensure fbs is disabled on ap, since we're resetting - * devices (AHCI section 9.3.8) - */ - s = splbio(); /* ignore spurious IFS errors while resetting */ DPRINTF(AHCI_D_VERBOSE, "%s: now ignoring IFS\n", PORTNAME(ap)); @@ -1524,10 +1498,6 @@ ahci_port_detect_pmp(struct ahci_port *ap) r = ahci_pread(ap, AHCI_PREG_SERR); ahci_pwrite(ap, AHCI_PREG_SERR, r); - /* XXX FBS: ensure we don't enable FBS here, since - * we're resetting the port - * (AHCI section 9.3.8) - */ /* Restart port */ if (ahci_port_start(ap, 0)) { rc = EBUSY; @@ -1645,7 +1615,6 @@ ahci_port_detect_pmp(struct ahci_port *ap) if (ahci_pmp_identify(ap, &ap->ap_pmp_ports)) { pmp_rc = EBUSY; } else { - /* XXX enable FBS if available */ rc = 0; } } @@ -1811,11 +1780,6 @@ ahci_start(struct ahci_ccb *ccb) bus_dmamap_sync(sc->sc_dmat, AHCI_DMA_MAP(ap->ap_dmamem_rfis), 0, sizeof(struct ahci_rfis), BUS_DMASYNC_PREREAD); - /* XXX FBS: need to figure out whether we still need to keep NCQ and - * non-queued commands separate when FBS is in use. I guess probably - * not? it's not particularly clear from the spec.. - */ - if (ccb->ccb_xa.flags & ATA_F_NCQ) { /* Issue NCQ commands only when there are no outstanding * standard commands. */ @@ -1824,10 +1788,6 @@ ahci_start(struct ahci_ccb *ccb) ap->ap_pmp_ncq_port != ccb->ccb_xa.pmp_port)) { TAILQ_INSERT_TAIL(&ap->ap_ccb_pending, ccb, ccb_entry); } else { - /* XXX FBS: if using FBS, set AHCI_PREG_FBS_DEV - * to the port number - */ - KASSERT(ap->ap_active_cnt == 0); ap->ap_sactive |= (1 << ccb->ccb_slot); ccb->ccb_xa.state = ATA_S_ONCHIP; @@ -1841,10 +1801,6 @@ ahci_start(struct ahci_ccb *ccb) if (ap->ap_sactive != 0 || ap->ap_active_cnt == 2) TAILQ_INSERT_TAIL(&ap->ap_ccb_pending, ccb, ccb_entry); else if (ap->ap_active_cnt < 2) { - /* XXX FBS: if using FBS, set AHCI_PREG_FBS_DEV to the - * port number - */ - ap->ap_active |= 1 << ccb->ccb_slot; ccb->ccb_xa.state = ATA_S_ONCHIP; ahci_pwrite(ap, AHCI_PREG_CI, 1 << ccb->ccb_slot); @@ -1865,11 +1821,6 @@ ahci_issue_pending_ncq_commands(struct ahci_port *ap) if (nextccb == NULL || !(nextccb->ccb_xa.flags & ATA_F_NCQ)) return; - /* XXX FBS: - * - set AHCI_PREG_FBS_DEV for each command - * - one write to AHCI_PREG_CI per command - */ - /* Start all the NCQ commands at the head of the pending list. * If a port multiplier is attached to the port, we can only * issue commands for one of its ports at a time. @@ -1930,7 +1881,6 @@ ahci_issue_pending_commands(struct ahci_port *ap, int last_was_ncq) TAILQ_REMOVE(&ap->ap_ccb_pending, nextccb, ccb_entry); ap->ap_active |= 1 << nextccb->ccb_slot; nextccb->ccb_xa.state = ATA_S_ONCHIP; - /* XXX FBS: set AHCI_PREG_FBS_DEV here */ ahci_pwrite(ap, AHCI_PREG_CI, 1 << nextccb->ccb_slot); if (last_was_ncq) ap->ap_active_cnt++; @@ -2144,10 +2094,8 @@ ahci_port_intr(struct ahci_port *ap, u_int32_t ci_mask) /* Had to reset device, can't gather extended info. */ } else if (ap->ap_sactive) { /* Recover the NCQ error from log page 10h. - * XXX FBS: need to do things to figure out where the - * error came from. without FBS, we know the PMP port - * responsible because we can only have queued commands - * active for one port at a time. + * We can only have queued commands active for one port + * at a time, so we know which device errored. */ ahci_port_read_ncq_error(ap, &err_slot, ap->ap_pmp_ncq_port); @@ -2333,11 +2281,6 @@ failall: "re-enabling%s slots %08x\n", PORTNAME(ap), ap->ap_sactive ? " NCQ" : "", ci_saved); - /* XXX FBS: - * - need to set AHCI_PREG_FBS_DEV for each command - * - can't do multiple commands with a single write to - * AHCI_PREG_CI - */ if (ap->ap_sactive) ahci_pwrite(ap, AHCI_PREG_SACT, ci_saved); ahci_pwrite(ap, AHCI_PREG_CI, ci_saved);