d/freebsd-skq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Rework WWNs generation to make cards without NVRAM more useful.

Browse Source
This commit is contained in:
mav 2015-12-05 21:38:04 +00:00
parent 69a946104c
commit 20e04de48a
1 changed files with 30 additions and 69 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

99
sys/dev/isp/isp_freebsd.c
View File

@ -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.
*/
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) {
return (seed);
}
return (0x400000007F000009ull);
}
/* First try to use explicitly configured WWNs. */
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) {
if (seed)
return (seed);
/* Otherwise try to use WWNs from NVRAM. */
if (isactive) {
seed = iswwnn ? FCPARAM(isp, chan)->isp_wwnn_nvram :
FCPARAM(isp, chan)->isp_wwpn_nvram;
if (seed)
return (seed);
}
/*
* 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 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;
}
}
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) {
/* If still nothing -- improvise. */
if (seed == 0) {
seed = 0x400000007F000000ull + device_get_unit(isp->isp_dev);
if (!iswwnn)
seed ^= 0x0100000000000000ULL;
}
/* 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);
}