Date: Thu, 28 Feb 2019 00:30:13 +0000 (UTC) From: Alexander Motin <mav@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r344651 - stable/12/sys/dev/ntb/ntb_hw Message-ID: <201902280030.x1S0UDuh034807@repo.freebsd.org>
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Author: mav Date: Thu Feb 28 00:30:13 2019 New Revision: 344651 URL: https://svnweb.freebsd.org/changeset/base/344651 Log: MFC r344437: Allow I/OAT of present Xeon E5/E7 to work thorugh PLX NTB. Its a hack, we can't know/list all DMA engines, but this covers all I/OAT of Xeon E5/E7 at least from Sandy Bridge till Skylake I saw. Modified: stable/12/sys/dev/ntb/ntb_hw/ntb_hw_plx.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/dev/ntb/ntb_hw/ntb_hw_plx.c ============================================================================== --- stable/12/sys/dev/ntb/ntb_hw/ntb_hw_plx.c Thu Feb 28 00:29:15 2019 (r344650) +++ stable/12/sys/dev/ntb/ntb_hw/ntb_hw_plx.c Thu Feb 28 00:30:13 2019 (r344651) @@ -202,16 +202,24 @@ ntb_plx_init(device_t dev) if (sc->alut) PNTX_WRITE(sc, 0xc94, 0); - /* Enable Link Interface LUT entries 0/1 for peer 0/1. */ - PNTX_WRITE(sc, 0xdb4, 0x00090001); + /* Enable all Link Interface LUT entries for peer. */ + for (i = 0; i < 32; i += 2) { + PNTX_WRITE(sc, 0xdb4 + i * 2, + 0x00010001 | ((i + 1) << 19) | (i << 3)); + } } /* - * Enable Virtual Interface LUT entry 0 for 0:0.0 and - * entry 1 for our Requester ID reported by chip. + * Enable Virtual Interface LUT entry 0 for 0:0.*. + * entry 1 for our Requester ID reported by the chip, + * entries 2-5 for 0/64/128/192:4.* of I/OAT DMA engines. + * XXX: Its a hack, we can't know all DMA engines, but this covers all + * I/OAT of Xeon E5/E7 at least from Sandy Bridge till Skylake I saw. */ val = (NTX_READ(sc, 0xc90) << 16) | 0x00010001; NTX_WRITE(sc, sc->link ? 0xdb4 : 0xd94, val); + NTX_WRITE(sc, sc->link ? 0xdb8 : 0xd98, 0x40210021); + NTX_WRITE(sc, sc->link ? 0xdbc : 0xd9c, 0xc0218021); /* Set Link to Virtual address translation. */ for (i = 0; i < sc->mw_count; i++) {
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