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lspci: Add support for the DOE Discovery options #152

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lspci: Add support for the DOE Discovery options #152

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6 changes: 6 additions & 0 deletions lib/header.h
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Original file line number Diff line number Diff line change
Expand Up @@ -1393,6 +1393,12 @@
#define PCI_DOE_STS_INT 0x2 /* DOE Interrupt Status */
#define PCI_DOE_STS_ERROR 0x3 /* DOE Error */
#define PCI_DOE_STS_OBJECT_READY 0x80000000 /* Data Object Ready */
#define PCI_DOE_WRITE_MAILBOX 0x10 /* DOE Write Data Mailbox Register */
#define PCI_DOE_READ_MAILBOX 0x14 /* DOE Read Data Mailbox Register */

#define PCI_DOE_DISCOVERY_RESPONSE_VENDOR_ID 0xFFFF
#define PCI_DOE_DISCOVERY_RESPONSE_OBJ_PROTOCOL 0xFF0000
#define PCI_DOE_DISCOVERY_RESPONSE_NEXT_INDX 0xFF000000

/*
* The PCI interface treats multi-function devices as independent
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74 changes: 74 additions & 0 deletions ls-ecaps.c
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@

#include <stdio.h>
#include <string.h>
#include <stdbool.h>

#include "lspci.h"

Expand Down Expand Up @@ -1374,6 +1375,77 @@ cap_rebar(struct device *d, int where, int virtual)
}
}

static void
doe_discovery(struct device *d, int where)
{
u32 l, index = 0, dop;

while (true) {
// header1
// VendorID = 0x01
// Data Object Type = 0x00
pci_write_long(d->dev, where + PCI_DOE_WRITE_MAILBOX, 0x00000001);

// header2
// Length = 0x03
pci_write_long(d->dev, where + PCI_DOE_WRITE_MAILBOX, 0x00000003);

// dword0
// DWORD = index
pci_write_long(d->dev, where + PCI_DOE_WRITE_MAILBOX, index);

pci_write_long(d->dev, where + PCI_DOE_CTL, PCI_DOE_CTL_GO);

while (pci_read_long(d->dev, where + PCI_DOE_STS) & PCI_DOE_STS_OBJECT_READY != 0x00) {
if ((pci_read_long(d->dev, where + PCI_DOE_STS) & PCI_DOE_STS_ERROR) == PCI_DOE_STS_ERROR) {
return;
}
}

l = pci_read_long(d->dev, where + PCI_DOE_READ_MAILBOX);
pci_write_long(d->dev, where + PCI_DOE_READ_MAILBOX, 0xDEADBEEF);
if (l != 0x01) {
break;
}

l = pci_read_long(d->dev, where + PCI_DOE_READ_MAILBOX);
pci_write_long(d->dev, where + PCI_DOE_READ_MAILBOX, 0xDEADBEEF);
if (l != 0x03) {
break;
}

// DOE discovery response data object
l = pci_read_long(d->dev, where + PCI_DOE_READ_MAILBOX);
pci_write_long(d->dev, where + PCI_DOE_READ_MAILBOX, 0xDEADBEEF);

if ((l & PCI_DOE_DISCOVERY_RESPONSE_VENDOR_ID) != 0x01) {
break;
}

dop = (l & PCI_DOE_DISCOVERY_RESPONSE_OBJ_PROTOCOL) >> 16;

switch (dop) {
case 0x00:
printf("\t\tDOE Protocol:\tDOE Discovery\n");
break;
case 0x01:
printf("\t\tDOE Protocol:\tCMA/SPDM\n");
break;
case 0x02:
printf("\t\tDOE Protocol:\tSecured CMA/SPDM\n");
break;
default:
printf("\t\tDOE Protocol:\t0x%x\n", dop);
}

if ((l & PCI_DOE_DISCOVERY_RESPONSE_NEXT_INDX) == 0x00) {
break;
}

index = (l & PCI_DOE_DISCOVERY_RESPONSE_NEXT_INDX) >> 24;
}
}

static void
cap_doe(struct device *d, int where)
{
Expand Down Expand Up @@ -1407,6 +1479,8 @@ cap_doe(struct device *d, int where)
FLAG(l, PCI_DOE_STS_INT),
FLAG(l, PCI_DOE_STS_ERROR),
FLAG(l, PCI_DOE_STS_OBJECT_READY));

doe_discovery(d, where);
}

void
Expand Down