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Print NVMe controller capabilities in verbose dmesg.

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Those values are not reported in controller identification, while sometimes
interesting for development and debugging.

MFC after:	1 week
This commit is contained in:
Alexander Motin 2020-10-28 15:43:29 +00:00
parent 19b5c30754
commit c44441f8fd
2 changed files with 38 additions and 3 deletions
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10
sys/dev/nvme/nvme.h
View File

@ -98,12 +98,20 @@
#define NVME_CAP_HI_REG_CMBS_MASK (0x1)
#define NVME_CAP_HI_DSTRD(x) \
(((x) >> NVME_CAP_HI_REG_DSTRD_SHIFT) & NVME_CAP_HI_REG_DSTRD_MASK)
#define NVME_CAP_HI_CSS_NVM(x) \
#define NVME_CAP_HI_NSSRS(x) \
(((x) >> NVME_CAP_HI_REG_NSSRS_SHIFT) & NVME_CAP_HI_REG_NSSRS_MASK)
#define NVME_CAP_HI_CSS(x) \
(((x) >> NVME_CAP_HI_REG_CSS_NVM_SHIFT) & NVME_CAP_HI_REG_CSS_NVM_MASK)
#define NVME_CAP_HI_BPS(x) \
(((x) >> NVME_CAP_HI_REG_BPS_SHIFT) & NVME_CAP_HI_REG_BPS_MASK)
#define NVME_CAP_HI_MPSMIN(x) \
(((x) >> NVME_CAP_HI_REG_MPSMIN_SHIFT) & NVME_CAP_HI_REG_MPSMIN_MASK)
#define NVME_CAP_HI_MPSMAX(x) \
(((x) >> NVME_CAP_HI_REG_MPSMAX_SHIFT) & NVME_CAP_HI_REG_MPSMAX_MASK)
#define NVME_CAP_HI_PMRS(x) \
(((x) >> NVME_CAP_HI_REG_PMRS_SHIFT) & NVME_CAP_HI_REG_PMRS_MASK)
#define NVME_CAP_HI_CMBS(x) \
(((x) >> NVME_CAP_HI_REG_CMBS_SHIFT) & NVME_CAP_HI_REG_CMBS_MASK)
#define NVME_CC_REG_EN_SHIFT (0)
#define NVME_CC_REG_EN_MASK (0x1)

31
sys/dev/nvme/nvme_ctrlr.c
View File

@ -1365,7 +1365,7 @@ nvme_ctrlr_construct(struct nvme_controller *ctrlr, device_t dev)
struct make_dev_args md_args;
uint32_t cap_lo;
uint32_t cap_hi;
uint32_t to;
uint32_t to, vs;
uint8_t mpsmin;
int status, timeout_period;
@ -1375,14 +1375,41 @@ nvme_ctrlr_construct(struct nvme_controller *ctrlr, device_t dev)
if (bus_get_domain(dev, &ctrlr->domain) != 0)
ctrlr->domain = 0;
cap_lo = nvme_mmio_read_4(ctrlr, cap_lo);
if (bootverbose) {
device_printf(dev, "CapLo: 0x%08x: MQES %u%s%s%s%s, TO %u\n",
cap_lo, NVME_CAP_LO_MQES(cap_lo),
NVME_CAP_LO_CQR(cap_lo) ? ", CQR" : "",
NVME_CAP_LO_AMS(cap_lo) ? ", AMS" : "",
(NVME_CAP_LO_AMS(cap_lo) & 0x1) ? " WRRwUPC" : "",
(NVME_CAP_LO_AMS(cap_lo) & 0x2) ? " VS" : "",
NVME_CAP_LO_TO(cap_lo));
}
cap_hi = nvme_mmio_read_4(ctrlr, cap_hi);
if (bootverbose) {
device_printf(dev, "CapHi: 0x%08x: DSTRD %u%s, CSS %x%s, "
"MPSMIN %u, MPSMAX %u %s%s\n", cap_hi,
NVME_CAP_HI_DSTRD(cap_hi),
NVME_CAP_HI_NSSRS(cap_lo) ? ", NSSRS" : "",
NVME_CAP_HI_CSS(cap_hi),
NVME_CAP_HI_BPS(cap_lo) ? ", BPS" : "",
NVME_CAP_HI_MPSMIN(cap_hi),
NVME_CAP_HI_MPSMAX(cap_hi),
NVME_CAP_HI_PMRS(cap_lo) ? ", PMRS" : "",
NVME_CAP_HI_CMBS(cap_lo) ? ", CMBS" : "");
}
if (bootverbose) {
vs = nvme_mmio_read_4(ctrlr, vs);
device_printf(dev, "Version: 0x%08x: %d.%d\n", vs,
NVME_MAJOR(vs), NVME_MINOR(vs));
}
ctrlr->dstrd = NVME_CAP_HI_DSTRD(cap_hi) + 2;
mpsmin = NVME_CAP_HI_MPSMIN(cap_hi);
ctrlr->min_page_size = 1 << (12 + mpsmin);
/* Get ready timeout value from controller, in units of 500ms. */
cap_lo = nvme_mmio_read_4(ctrlr, cap_lo);
to = NVME_CAP_LO_TO(cap_lo) + 1;
ctrlr->ready_timeout_in_ms = to * 500;