aboutsummaryrefslogtreecommitdiff
path: root/hw/pci/slotid_cap.c
diff options
context:
space:
mode:
authorMichael S. Tsirkin <mst@redhat.com>2012-12-12 13:32:14 +0200
committerMichael S. Tsirkin <mst@redhat.com>2012-12-17 13:02:17 +0200
commit315a1350c4a386065a73aad2ded1a11d77bf7771 (patch)
treeaa3fb4aef47d33387386df46eb6cd1c47b35c197 /hw/pci/slotid_cap.c
parentca818cfbfd77e02ffac338866568ac07f6f5fd7d (diff)
downloadqemu-315a1350c4a386065a73aad2ded1a11d77bf7771.zip
qemu-315a1350c4a386065a73aad2ded1a11d77bf7771.tar.gz
qemu-315a1350c4a386065a73aad2ded1a11d77bf7771.tar.bz2
pci: move pci core code to hw/pci
Move files and modify makefiles to pick them at the new location. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/pci/slotid_cap.c')
-rw-r--r--hw/pci/slotid_cap.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/hw/pci/slotid_cap.c b/hw/pci/slotid_cap.c
new file mode 100644
index 0000000..0106452
--- /dev/null
+++ b/hw/pci/slotid_cap.c
@@ -0,0 +1,44 @@
+#include "slotid_cap.h"
+#include "pci.h"
+
+#define SLOTID_CAP_LENGTH 4
+#define SLOTID_NSLOTS_SHIFT (ffs(PCI_SID_ESR_NSLOTS) - 1)
+
+int slotid_cap_init(PCIDevice *d, int nslots,
+ uint8_t chassis,
+ unsigned offset)
+{
+ int cap;
+ if (!chassis) {
+ error_report("Bridge chassis not specified. Each bridge is required "
+ "to be assigned a unique chassis id > 0.");
+ return -EINVAL;
+ }
+ if (nslots < 0 || nslots > (PCI_SID_ESR_NSLOTS >> SLOTID_NSLOTS_SHIFT)) {
+ /* TODO: error report? */
+ return -EINVAL;
+ }
+
+ cap = pci_add_capability(d, PCI_CAP_ID_SLOTID, offset, SLOTID_CAP_LENGTH);
+ if (cap < 0) {
+ return cap;
+ }
+ /* We make each chassis unique, this way each bridge is First in Chassis */
+ d->config[cap + PCI_SID_ESR] = PCI_SID_ESR_FIC |
+ (nslots << SLOTID_NSLOTS_SHIFT);
+ d->cmask[cap + PCI_SID_ESR] = 0xff;
+ d->config[cap + PCI_SID_CHASSIS_NR] = chassis;
+ /* Note: Chassis number register is non-volatile,
+ so we don't reset it. */
+ /* TODO: store in eeprom? */
+ d->wmask[cap + PCI_SID_CHASSIS_NR] = 0xff;
+
+ d->cap_present |= QEMU_PCI_CAP_SLOTID;
+ return 0;
+}
+
+void slotid_cap_cleanup(PCIDevice *d)
+{
+ /* TODO: cleanup config space? */
+ d->cap_present &= ~QEMU_PCI_CAP_SLOTID;
+}