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nvme-print-stdout: Add CAP.CPS and CAP.NSSS human readable outputs #2067

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Sep 28, 2023
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nvme-print-stdout: Add CAP.CPS and CAP.NSSS human readable outputs #2067

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66 changes: 36 additions & 30 deletions nvme-print-stdout.c
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Original file line number Diff line number Diff line change
Expand Up @@ -28,11 +28,23 @@ static struct print_ops stdout_print_ops;

struct nvme_bar_cap {
__u16 mqes;
__u8 ams_cqr;
__u8 cqr:1;
__u8 ams:2;
__u8 rsvd19:5;
__u8 to;
__u16 bps_css_nssrs_dstrd;
__u8 mpsmax_mpsmin;
__u8 rsvd_crms_nsss_cmbs_pmrs;
__u16 dstrd:4;
__u16 nssrs:1;
__u16 css:8;
__u16 bps:1;
__u8 cps:2;
__u8 mpsmin:4;
__u8 mpsmax:4;
__u8 pmrs:1;
__u8 cmbs:1;
__u8 nsss:1;
__u8 crwms:1;
__u8 crims:1;
__u8 rsvd61:3;
};

static const char *subsys_key(const struct nvme_subsystem *s)
Expand Down Expand Up @@ -1103,39 +1115,33 @@ static void stdout_subsystem_list(nvme_root_t r, bool show_ana)
static void stdout_registers_cap(struct nvme_bar_cap *cap)
{
printf("\tController Ready With Media Support (CRWMS): %s\n",
((cap->rsvd_crms_nsss_cmbs_pmrs & 0x08) >> 3) ? "Supported" : "Not Supported");
cap->crwms ? "Supported" : "Not Supported");
printf("\tController Ready Independent of Media Support (CRIMS): %s\n",
((cap->rsvd_crms_nsss_cmbs_pmrs & 0x10) >> 4) ? "Supported" : "Not Supported");
cap->crims ? "Supported" : "Not Supported");
printf("\tNVM Subsystem Shutdown Supported (NSSS): %s\n", cap->nsss ? "Supported" : "Not Supported");
printf("\tController Memory Buffer Supported (CMBS): The Controller Memory Buffer is %s\n",
((cap->rsvd_crms_nsss_cmbs_pmrs & 0x02) >> 1) ? "Supported" :
"Not Supported");
cap->cmbs ? "Supported" : "Not Supported");
printf("\tPersistent Memory Region Supported (PMRS): The Persistent Memory Region is %s\n",
(cap->rsvd_crms_nsss_cmbs_pmrs & 0x01) ? "Supported" : "Not Supported");
printf("\tMemory Page Size Maximum (MPSMAX): %u bytes\n",
1 << (12 + ((cap->mpsmax_mpsmin & 0xf0) >> 4)));
printf("\tMemory Page Size Minimum (MPSMIN): %u bytes\n",
1 << (12 + (cap->mpsmax_mpsmin & 0x0f)));
printf("\tBoot Partition Support (BPS): %s\n",
(cap->bps_css_nssrs_dstrd & 0x2000) ? "Yes":"No");
cap->pmrs ? "Supported" : "Not Supported");
printf("\tMemory Page Size Maximum (MPSMAX): %u bytes\n", 1 << (12 + cap->mpsmax));
printf("\tMemory Page Size Minimum (MPSMIN): %u bytes\n", 1 << (12 + cap->mpsmin));
printf("\tController Power Scope (CPS): %s\n",
!cap->cps ? "Not Reported" : cap->cps == 1 ? "Controller scope" :
cap->cps == 2 ? "Domain scope" : "NVM subsystem scope");
printf("\tBoot Partition Support (BPS): %s\n", cap->bps ? "Yes" : "No");
printf("\tCommand Sets Supported (CSS): NVM command set is %s\n",
(cap->bps_css_nssrs_dstrd & 0x0020) ? "Supported" : "Not Supported");
cap->css & 0x01 ? "Supported" : "Not Supported");
printf("\t One or more I/O Command Sets are %s\n",
(cap->bps_css_nssrs_dstrd & 0x0800) ? "Supported" : "Not Supported");
cap->css & 0x40 ? "Supported" : "Not Supported");
printf("\t %s\n",
(cap->bps_css_nssrs_dstrd & 0x1000) ? "Only Admin Command Set Supported" :
"I/O Command Set is Supported");
printf("\tNVM Subsystem Reset Supported (NSSRS): %s\n",
(cap->bps_css_nssrs_dstrd & 0x0010) ? "Yes":"No");
printf("\tDoorbell Stride (DSTRD): %u bytes\n",
1 << (2 + (cap->bps_css_nssrs_dstrd & 0x000f)));
printf("\tTimeout (TO): %u ms\n",
cap->to * 500);
cap->css & 0x80 ? "Only Admin Command Set Supported" : "I/O Command Set is Supported");
printf("\tNVM Subsystem Reset Supported (NSSRS): %s\n", cap->nssrs ? "Yes" : "No");
printf("\tDoorbell Stride (DSTRD): %u bytes\n", 1 << (2 + cap->dstrd));
printf("\tTimeout (TO): %u ms\n", cap->to * 500);
printf("\tArbitration Mechanism Supported (AMS): Weighted Round Robin with Urgent Priority Class is %s\n",
(cap->ams_cqr & 0x02) ? "supported":"not supported");
printf("\tContiguous Queues Required (CQR): %s\n",
(cap->ams_cqr & 0x01) ? "Yes":"No");
printf("\tMaximum Queue Entries Supported (MQES): %u\n\n",
cap->mqes + 1);
cap->ams & 0x02 ? "Supported" : "Not supported");
printf("\tContiguous Queues Required (CQR): %s\n", cap->cqr ? "Yes" : "No");
printf("\tMaximum Queue Entries Supported (MQES): %u\n\n", cap->mqes + 1);
}

static void stdout_registers_version(__u32 vs)
Expand Down