*
* Copyright (c) 2008 Martin Mares <mj@ucw.cz>
*
- * Can be freely distributed and used under the terms of the GNU GPL.
+ * Can be freely distributed and used under the terms of the GNU GPL v2+.
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <string.h>
{
struct pci_cap *cap = pci_malloc(d->access, sizeof(*cap));
- cap->next = d->first_cap;
- d->first_cap = cap;
+ if (d->last_cap)
+ d->last_cap->next = cap;
+ else
+ d->first_cap = cap;
+ d->last_cap = cap;
+ cap->next = NULL;
cap->addr = addr;
cap->id = id;
cap->type = type;
if (been_there[where]++)
break;
pci_add_cap(d, where, id, PCI_CAP_EXTENDED);
- where = header >> 20;
+ where = (header >> 20) & ~3;
}
while (where);
}
-unsigned int
+void
pci_scan_caps(struct pci_dev *d, unsigned int want_fields)
{
- if ((want_fields & PCI_FILL_EXT_CAPS) && !(d->known_fields & PCI_FILL_CAPS))
+ if (want_fields & PCI_FILL_EXT_CAPS)
want_fields |= PCI_FILL_CAPS;
- if (want_fields & PCI_FILL_CAPS)
+ if (want_fill(d, want_fields, PCI_FILL_CAPS))
pci_scan_trad_caps(d);
- if (want_fields & PCI_FILL_EXT_CAPS)
+ if (want_fill(d, want_fields, PCI_FILL_EXT_CAPS))
pci_scan_ext_caps(d);
- return want_fields;
}
void
struct pci_cap *
pci_find_cap(struct pci_dev *d, unsigned int id, unsigned int type)
+{
+ return pci_find_cap_nr(d, id, type, NULL);
+}
+
+/**
+ * Finds a particular capability of a device
+ *
+ * To select one capability if there are more than one with the same id, you
+ * can provide a pointer to an unsigned int that contains the index which you
+ * want as cap_number. If you don't care and are fine with the first one you
+ * can supply NULL. The cap_number will be replaced by the actual number
+ * of capabilities with that id.
+ */
+struct pci_cap *
+pci_find_cap_nr(struct pci_dev *d, unsigned int id, unsigned int type,
+ unsigned int *cap_number)
{
struct pci_cap *c;
+ struct pci_cap *found = NULL;
+ unsigned int target = (cap_number ? *cap_number : 0);
+ unsigned int index = 0;
+
+ pci_fill_info_v38(d, ((type == PCI_CAP_NORMAL) ? PCI_FILL_CAPS : PCI_FILL_EXT_CAPS));
- pci_fill_info_v31(d, ((type == PCI_CAP_NORMAL) ? PCI_FILL_CAPS : PCI_FILL_EXT_CAPS));
for (c=d->first_cap; c; c=c->next)
- if (c->type == type && c->id == id)
- return c;
- return NULL;
+ {
+ if (c->type == type && c->id == id)
+ {
+ if (target == index)
+ found = c;
+ index++;
+ }
+ }
+
+ if (cap_number)
+ *cap_number = index;
+ return found;
}