diff options
| author | Alexander Motin <mav@FreeBSD.org> | 2019-02-21 14:10:14 +0000 |
|---|---|---|
| committer | Alexander Motin <mav@FreeBSD.org> | 2019-02-21 14:10:14 +0000 |
| commit | a8bc5594db0cf7784e6bf299e59b28e37a73ae23 (patch) | |
| tree | d879716759c5806d5a46e08902ffa25a311ce268 /sys/dev/ntb/ntb_hw | |
| parent | 560c058683bd65b7c2dde1d918b831bca3ee85ef (diff) | |
| download | src-a8bc5594db0cf7784e6bf299e59b28e37a73ae23.tar.gz src-a8bc5594db0cf7784e6bf299e59b28e37a73ae23.zip | |
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.
MFC after: 1 week
Sponsored by: iXsystems, Inc.
Notes
Notes:
svn path=/head/; revision=344437
Diffstat (limited to 'sys/dev/ntb/ntb_hw')
| -rw-r--r-- | sys/dev/ntb/ntb_hw/ntb_hw_plx.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/sys/dev/ntb/ntb_hw/ntb_hw_plx.c b/sys/dev/ntb/ntb_hw/ntb_hw_plx.c index 98ca60b651f1..040bb8f80e29 100644 --- a/sys/dev/ntb/ntb_hw/ntb_hw_plx.c +++ b/sys/dev/ntb/ntb_hw/ntb_hw_plx.c @@ -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++) { |