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author | mav <mav@FreeBSD.org> | 2015-12-22 12:54:13 +0000 |
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committer | mav <mav@FreeBSD.org> | 2015-12-22 12:54:13 +0000 |
commit | 2c4aa6921414a03bff2da6a080e1b3fec7a04f97 (patch) | |
tree | 1701bc386e919672ebd9fe9a7e4c9c0e8bc3374e /sys/dev | |
parent | 88f7208f5800456cdf4949f98354e922b5060515 (diff) | |
download | FreeBSD-src-2c4aa6921414a03bff2da6a080e1b3fec7a04f97.zip FreeBSD-src-2c4aa6921414a03bff2da6a080e1b3fec7a04f97.tar.gz |
MFC r291868: Rework WWNs generation to make cards without NVRAM more useful.
Diffstat (limited to 'sys/dev')
-rw-r--r-- | sys/dev/isp/isp_freebsd.c | 95 |
1 files changed, 28 insertions, 67 deletions
diff --git a/sys/dev/isp/isp_freebsd.c b/sys/dev/isp/isp_freebsd.c index 73741eb..c533d69 100644 --- a/sys/dev/isp/isp_freebsd.c +++ b/sys/dev/isp/isp_freebsd.c @@ -4550,91 +4550,52 @@ isp_uninit(ispsoftc_t *isp) ISP_DISABLE_INTS(isp); } -/* - * When we want to get the 'default' WWNs (when lacking NVRAM), we pick them - * up from our platform default (defww{p|n}n) and morph them based upon - * channel. - * - * When we want to get the 'active' WWNs, we get NVRAM WWNs and then morph them - * based upon channel. - */ - uint64_t isp_default_wwn(ispsoftc_t * isp, int chan, int isactive, int iswwnn) { uint64_t seed; struct isp_fc *fc = ISP_FC_PC(isp, chan); - /* - * If we're asking for a active WWN, the default overrides get - * returned, otherwise the NVRAM value is picked. - * - * If we're asking for a default WWN, we just pick the default override. - */ + /* First try to use explicitly configured WWNs. */ + seed = iswwnn ? fc->def_wwnn : fc->def_wwpn; + if (seed) + return (seed); + + /* Otherwise try to use WWNs from NVRAM. */ if (isactive) { - seed = iswwnn ? fc->def_wwnn : fc->def_wwpn; - if (seed) { - return (seed); - } - seed = iswwnn ? FCPARAM(isp, chan)->isp_wwnn_nvram : FCPARAM(isp, chan)->isp_wwpn_nvram; - if (seed) { + seed = iswwnn ? FCPARAM(isp, chan)->isp_wwnn_nvram : + FCPARAM(isp, chan)->isp_wwpn_nvram; + if (seed) return (seed); - } - return (0x400000007F000009ull); } - seed = iswwnn ? fc->def_wwnn : fc->def_wwpn; - - /* - * For channel zero just return what we have. For either ACTIVE or - * DEFAULT cases, we depend on default override of NVRAM values for - * channel zero. - */ - if (chan == 0) { - return (seed); + /* If still no WWNs, try to steal them from the first channel. */ + if (chan > 0) { + seed = iswwnn ? ISP_FC_PC(isp, 0)->def_wwnn : + ISP_FC_PC(isp, 0)->def_wwpn; + if (seed == 0) { + seed = iswwnn ? FCPARAM(isp, 0)->isp_wwnn_nvram : + FCPARAM(isp, 0)->isp_wwpn_nvram; + } } - /* - * For other channels, we are doing one of three things: - * - * 1. If what we have now is non-zero, return it. Otherwise we morph - * values from channel 0. 2. If we're here for a WWPN we synthesize - * it if Channel 0's wwpn has a type 2 NAA. 3. If we're here for a - * WWNN we synthesize it if Channel 0's wwnn has a type 2 NAA. - */ - - if (seed) { - return (seed); + /* If still nothing -- improvise. */ + if (seed == 0) { + seed = 0x400000007F000000ull + device_get_unit(isp->isp_dev); + if (!iswwnn) + seed ^= 0x0100000000000000ULL; } - seed = iswwnn ? ISP_FC_PC(isp, 0)->def_wwnn : ISP_FC_PC(isp, 0)->def_wwpn; - if (seed == 0) - seed = iswwnn ? FCPARAM(isp, 0)->isp_wwnn_nvram : FCPARAM(isp, 0)->isp_wwpn_nvram; - if (((seed >> 60) & 0xf) == 2) { + /* For additional channels we have to improvise even more. */ + if (!iswwnn && chan > 0) { /* - * The type 2 NAA fields for QLogic cards appear be laid out - * thusly: - * - * bits 63..60 NAA == 2 bits 59..57 unused/zero bit 56 - * port (1) or node (0) WWN distinguishor bit 48 - * physical port on dual-port chips (23XX/24XX) - * - * This is somewhat nutty, particularly since bit 48 is - * irrelevant as they assign separate serial numbers to - * different physical ports anyway. - * * We'll stick our channel number plus one first into bits * 57..59 and thence into bits 52..55 which allows for 8 bits - * of channel which is comfortably more than our maximum - * (126) now. + * of channel which is enough for our maximum of 255 channels. */ - seed &= ~0x0FF0000000000000ULL; - if (iswwnn == 0) { - seed |= ((uint64_t) (chan + 1) & 0xf) << 56; - seed |= ((uint64_t) ((chan + 1) >> 4) & 0xf) << 52; - } - } else { - seed = 0; + seed ^= 0x0100000000000000ULL; + seed ^= ((uint64_t) (chan + 1) & 0xf) << 56; + seed ^= ((uint64_t) ((chan + 1) >> 4) & 0xf) << 52; } return (seed); } |