aboutsummaryrefslogtreecommitdiff
path: root/hw/pcie_port.c
diff options
context:
space:
mode:
authorIsaku Yamahata <yamahata@valinux.co.jp>2010-10-20 17:18:52 +0900
committerMichael S. Tsirkin <mst@redhat.com>2010-10-20 12:05:45 +0200
commitbc20ba98b1a04c9e60de10f2a5626af2c528422b (patch)
tree89653d78deb1e29e732c98c3ba9a7f331e375e0a /hw/pcie_port.c
parent0208def1cadd4f72f862e62548c2af268a543b20 (diff)
downloadqemu-bc20ba98b1a04c9e60de10f2a5626af2c528422b.zip
qemu-bc20ba98b1a04c9e60de10f2a5626af2c528422b.tar.gz
qemu-bc20ba98b1a04c9e60de10f2a5626af2c528422b.tar.bz2
pcie port: define struct PCIEPort/PCIESlot and helper functions
define struct PCIEPort which represents common part of pci express port.(root, upstream and downstream.) add a helper function for pcie port which can be used commonly by root/upstream/downstream port. define struct PCIESlot which represents common part of pcie slot.(root and downstream.) and helper functions for it. helper functions for chassis, slot -> PCIESlot conversion. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/pcie_port.c')
-rw-r--r--hw/pcie_port.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/hw/pcie_port.c b/hw/pcie_port.c
new file mode 100644
index 0000000..117de61
--- /dev/null
+++ b/hw/pcie_port.c
@@ -0,0 +1,116 @@
+/*
+ * pcie_port.c
+ *
+ * Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp>
+ * VA Linux Systems Japan K.K.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "pcie_port.h"
+
+void pcie_port_init_reg(PCIDevice *d)
+{
+ /* Unlike pci bridge,
+ 66MHz and fast back to back don't apply to pci express port. */
+ pci_set_word(d->config + PCI_STATUS, 0);
+ pci_set_word(d->config + PCI_SEC_STATUS, 0);
+
+ /* 7.5.3.5 Prefetchable Memory Base Limit
+ * The Prefetchable Memory Base and Prefetchable Memory Limit registers
+ * must indicate that 64-bit addresses are supported, as defined in
+ * PCI-to-PCI Bridge Architecture Specification, Revision 1.2.
+ */
+ pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_BASE,
+ PCI_PREF_RANGE_TYPE_64);
+ pci_word_test_and_set_mask(d->config + PCI_PREF_MEMORY_LIMIT,
+ PCI_PREF_RANGE_TYPE_64);
+}
+
+/**************************************************************************
+ * (chassis number, pcie physical slot number) -> pcie slot conversion
+ */
+struct PCIEChassis {
+ uint8_t number;
+
+ QLIST_HEAD(, PCIESlot) slots;
+ QLIST_ENTRY(PCIEChassis) next;
+};
+
+static QLIST_HEAD(, PCIEChassis) chassis = QLIST_HEAD_INITIALIZER(chassis);
+
+static struct PCIEChassis *pcie_chassis_find(uint8_t chassis_number)
+{
+ struct PCIEChassis *c;
+ QLIST_FOREACH(c, &chassis, next) {
+ if (c->number == chassis_number) {
+ break;
+ }
+ }
+ return c;
+}
+
+void pcie_chassis_create(uint8_t chassis_number)
+{
+ struct PCIEChassis *c;
+ c = pcie_chassis_find(chassis_number);
+ if (c) {
+ return;
+ }
+ c = qemu_mallocz(sizeof(*c));
+ c->number = chassis_number;
+ QLIST_INIT(&c->slots);
+ QLIST_INSERT_HEAD(&chassis, c, next);
+}
+
+static PCIESlot *pcie_chassis_find_slot_with_chassis(struct PCIEChassis *c,
+ uint8_t slot)
+{
+ PCIESlot *s;
+ QLIST_FOREACH(s, &c->slots, next) {
+ if (s->slot == slot) {
+ break;
+ }
+ }
+ return s;
+}
+
+PCIESlot *pcie_chassis_find_slot(uint8_t chassis_number, uint16_t slot)
+{
+ struct PCIEChassis *c;
+ c = pcie_chassis_find(chassis_number);
+ if (!c) {
+ return NULL;
+ }
+ return pcie_chassis_find_slot_with_chassis(c, slot);
+}
+
+int pcie_chassis_add_slot(struct PCIESlot *slot)
+{
+ struct PCIEChassis *c;
+ c = pcie_chassis_find(slot->chassis);
+ if (!c) {
+ return -ENODEV;
+ }
+ if (pcie_chassis_find_slot_with_chassis(c, slot->slot)) {
+ return -EBUSY;
+ }
+ QLIST_INSERT_HEAD(&c->slots, slot, next);
+ return 0;
+}
+
+void pcie_chassis_del_slot(PCIESlot *s)
+{
+ QLIST_REMOVE(s, next);
+}