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diff --git a/usr.sbin/pciconf/cap.c b/usr.sbin/pciconf/cap.c
--- a/usr.sbin/pciconf/cap.c
+++ b/usr.sbin/pciconf/cap.c
@@ -1016,6 +1016,64 @@
print_bar(fd, p, "iov bar ", ptr + PCIR_SRIOV_BAR(i));
}
+static const char *
+check_avail_and_state(u_int cap, u_int capbit, u_int ctl, u_int ctlbit)
+{
+
+ if (cap & capbit)
+ return (ctl & ctlbit ? "enabled" : "disabled");
+ else
+ return "unavailable";
+}
+
+static void
+ecap_acs(int fd, struct pci_conf *p, uint16_t ptr, uint8_t ver)
+{
+ uint16_t acs_cap, acs_ctl;
+ static const char *const acc[] = { "access enabled", "blocking enabled",
+ "redirect enabled", "reserved" };
+
+ printf("ACS %d ", ver);
+ if (ver != 1) {
+ printf("\n");
+ return;
+ }
+
+#define CHECK_AVAIL_STATE(bit) \
+ check_avail_and_state(acs_cap, bit, acs_ctl, bit##_ENABLE)
+
+ acs_cap = read_config(fd, &p->pc_sel, ptr + PCIR_ACS_CAP, 2);
+ acs_ctl = read_config(fd, &p->pc_sel, ptr + PCIR_ACS_CTL, 2);
+ printf("Source Validation %s, Translation Blocking %s\n",
+ CHECK_AVAIL_STATE(PCIM_ACS_SOURCE_VALIDATION),
+ CHECK_AVAIL_STATE(PCIM_ACS_TRANSLATION_BLOCKING));
+
+ printf(" ");
+ printf("P2P Req Redirect %s, P2P Cmpl Redirect %s\n",
+ CHECK_AVAIL_STATE(PCIM_ACS_P2P_REQ_REDIRECT),
+ CHECK_AVAIL_STATE(PCIM_ACS_P2P_CMP_REDIRECT));
+ printf(" ");
+ printf("P2P Upstream Forwarding %s, P2P Egress Control %s\n",
+ CHECK_AVAIL_STATE(PCIM_ACS_P2P_UPSTREAM_FORWARDING),
+ CHECK_AVAIL_STATE(PCIM_ACS_P2P_EGRESS_CTL));
+ printf(" ");
+ printf("P2P Direct Translated %s, Enhanced Capability %s\n",
+ CHECK_AVAIL_STATE(PCIM_ACS_P2P_DIRECT_TRANSLATED),
+ acs_ctl & PCIM_ACS_ENHANCED_CAP ? "available" : "unavailable");
+#undef CHECK_AVAIL_STATE
+
+ if (acs_cap & PCIM_ACS_ENHANCED_CAP) {
+ printf(" ");
+ printf("I/O Req Blocking %s, Unclaimed Req Redirect Control %s\n",
+ check_enabled(acs_ctl & PCIM_ACS_IO_REQ_BLOCKING_ENABLE),
+ check_enabled(acs_ctl & PCIM_ACS_UNCLAIMED_REQ_REDIRECT_CTL));
+ printf(" ");
+ printf("DSP BAR %s, USP BAR %s\n",
+ acc[(acs_cap & PCIM_ACS_DSP_MEM_TGT_ACC_CTL) >> 8],
+ acc[(acs_cap & PCIM_ACS_USP_MEM_TGT_ACC_CTL) >> 10]);
+ }
+}
+
static struct {
uint16_t id;
const char *name;
@@ -1099,6 +1157,9 @@
case PCIZ_SRIOV:
ecap_sriov(fd, p, ptr, PCI_EXTCAP_VER(ecap));
break;
+ case PCIZ_ACS:
+ ecap_acs(fd, p, ptr, PCI_EXTCAP_VER(ecap));
+ break;
default:
name = "unknown";
for (i = 0; ecap_names[i].name != NULL; i++)

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