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MFC: r253455

Decode PCIe ASPM capability and status.

Approved by:	re (delphij)
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commit fe52e0a7b1f2511aea888bdb15f4d7eedc1fc4bd 1 parent fc46998
@juikim juikim authored
Showing with 38 additions and 20 deletions.
  1. +38 −20 usr.sbin/pciconf/cap.c
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58 usr.sbin/pciconf/cap.c
@@ -391,11 +391,27 @@ link_speed_string(uint8_t speed)
}
}
+static const char *
+aspm_string(uint8_t aspm)
+{
+
+ switch (aspm) {
+ case 1:
+ return ("L0s");
+ case 2:
+ return ("L1");
+ case 3:
+ return ("L0s/L1");
+ default:
+ return ("disabled");
+ }
+}
+
static void
cap_express(int fd, struct pci_conf *p, uint8_t ptr)
{
- uint32_t val;
- uint16_t flags;
+ uint32_t cap;
+ uint16_t ctl, flags, sta;
flags = read_config(fd, &p->pc_sel, ptr + PCIER_FLAGS, 2);
printf("PCI-Express %d ", flags & PCIEM_FLAGS_VERSION);
@@ -435,26 +451,28 @@ cap_express(int fd, struct pci_conf *p, uint8_t ptr)
printf(" slot");
if (flags & PCIEM_FLAGS_IRQ)
printf(" IRQ %d", (flags & PCIEM_FLAGS_IRQ) >> 9);
- val = read_config(fd, &p->pc_sel, ptr + PCIER_DEVICE_CAP, 4);
- flags = read_config(fd, &p->pc_sel, ptr + PCIER_DEVICE_CTL, 2);
+ cap = read_config(fd, &p->pc_sel, ptr + PCIER_DEVICE_CAP, 4);
+ ctl = read_config(fd, &p->pc_sel, ptr + PCIER_DEVICE_CTL, 2);
printf(" max data %d(%d)",
- MAX_PAYLOAD((flags & PCIEM_CTL_MAX_PAYLOAD) >> 5),
- MAX_PAYLOAD(val & PCIEM_CAP_MAX_PAYLOAD));
- if (val & PCIEM_CAP_FLR)
+ MAX_PAYLOAD((ctl & PCIEM_CTL_MAX_PAYLOAD) >> 5),
+ MAX_PAYLOAD(cap & PCIEM_CAP_MAX_PAYLOAD));
+ if ((cap & PCIEM_CAP_FLR) != 0)
printf(" FLR");
- val = read_config(fd, &p->pc_sel, ptr + PCIER_LINK_CAP, 4);
- flags = read_config(fd, &p->pc_sel, ptr+ PCIER_LINK_STA, 2);
- printf(" link x%d(x%d)", (flags & PCIEM_LINK_STA_WIDTH) >> 4,
- (val & PCIEM_LINK_CAP_MAX_WIDTH) >> 4);
- /*
- * Only print link speed info if the link's max width is
- * greater than 0.
- */
- if ((val & PCIEM_LINK_CAP_MAX_WIDTH) != 0) {
- printf("\n speed");
- printf(" %s(%s)", (flags & PCIEM_LINK_STA_WIDTH) == 0 ?
- "0.0" : link_speed_string(flags & PCIEM_LINK_STA_SPEED),
- link_speed_string(val & PCIEM_LINK_CAP_MAX_SPEED));
+ cap = read_config(fd, &p->pc_sel, ptr + PCIER_LINK_CAP, 4);
+ sta = read_config(fd, &p->pc_sel, ptr + PCIER_LINK_STA, 2);
+ printf(" link x%d(x%d)", (sta & PCIEM_LINK_STA_WIDTH) >> 4,
+ (cap & PCIEM_LINK_CAP_MAX_WIDTH) >> 4);
+ if ((cap & (PCIEM_LINK_CAP_MAX_WIDTH | PCIEM_LINK_CAP_ASPM)) != 0)
+ printf("\n ");
+ if ((cap & PCIEM_LINK_CAP_MAX_WIDTH) != 0) {
+ printf(" speed %s(%s)", (sta & PCIEM_LINK_STA_WIDTH) == 0 ?
+ "0.0" : link_speed_string(sta & PCIEM_LINK_STA_SPEED),
+ link_speed_string(cap & PCIEM_LINK_CAP_MAX_SPEED));
+ }
+ if ((cap & PCIEM_LINK_CAP_ASPM) != 0) {
+ ctl = read_config(fd, &p->pc_sel, ptr + PCIER_LINK_CTL, 2);
+ printf(" ASPM %s(%s)", aspm_string(ctl & PCIEM_LINK_CTL_ASPMC),
+ aspm_string((cap & PCIEM_LINK_CAP_ASPM) >> 10));
}
}
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