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[Qemu-devel] [PATCH 21/25] pci: make bar update function aware of pci br
From: |
Isaku Yamahata |
Subject: |
[Qemu-devel] [PATCH 21/25] pci: make bar update function aware of pci bridge. |
Date: |
Sat, 3 Oct 2009 05:16:13 +0900 |
header type of 01 has differenct BAR to type 00.
It has only BAR0,1 and expantion rom whose offset address
is different from type 00 one.
Signed-off-by: Isaku Yamahata <address@hidden>
---
hw/pci.c | 66 +++++++++++++++++++++++++++++++++++++++++++++++++++----------
hw/pci.h | 1 +
2 files changed, 56 insertions(+), 11 deletions(-)
diff --git a/hw/pci.c b/hw/pci.c
index ed9b785..b708d71 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -498,6 +498,35 @@ int pci_unregister_device(PCIDevice *pci_dev)
return 0;
}
+#define PCI_BAR_INVALID UINT32_MAX
+static uint32_t pci_bar_config_offset(PCIDevice *d, int region_num)
+{
+ switch (d->config[PCI_HEADER_TYPE] & ~PCI_HEADER_TYPE_MULTI_FUNCTION) {
+ case PCI_HEADER_TYPE_NORMAL:
+ /* BAR 0-5 and Expantion ROM*/
+ if (region_num < PCI_ROM_SLOT) {
+ return PCI_BASE_ADDRESS_0 + region_num * 4;
+ } else if (region_num == PCI_ROM_SLOT) {
+ return PCI_ROM_ADDRESS;
+ }
+ break;
+ case PCI_HEADER_TYPE_BRIDGE:
+ /* BAR 0-1 and Expantion ROM */
+ if (region_num < 2) {
+ return PCI_BASE_ADDRESS_0 + region_num * 4;
+ } else if (region_num == PCI_ROM_SLOT) {
+ return PCI_ROM_ADDRESS1;
+ }
+ break;
+ case PCI_HEADER_TYPE_CARDBUS:
+ default:
+ break;
+ }
+ fprintf(stderr, "ERROR: %s: unknow PCI config header type %d or bar %d\n",
+ __func__, d->config[PCI_HEADER_TYPE], region_num);
+ return PCI_BAR_INVALID;
+}
+
void pci_register_bar(PCIDevice *pci_dev, int region_num,
pcibus_t size, int type,
PCIMapIORegionFunc *map_func)
@@ -521,13 +550,11 @@ void pci_register_bar(PCIDevice *pci_dev, int region_num,
r->type = type;
r->map_func = map_func;
+ addr = pci_bar_config_offset(pci_dev, region_num);
wmask = ~(size - 1);
if (region_num == PCI_ROM_SLOT) {
- addr = 0x30;
/* ROM enable bit is writeable */
wmask |= PCI_ROM_ADDRESS_ENABLE;
- } else {
- addr = 0x10 + region_num * 4;
}
pci_set_long(pci_dev->config + addr, type);
if (pci_bar_is_64bit(r)) {
@@ -549,11 +576,9 @@ static void pci_update_mappings(PCIDevice *d)
cmd = pci_get_word(d->config + PCI_COMMAND);
for(i = 0; i < PCI_NUM_REGIONS; i++) {
r = &d->io_regions[i];
- if (i == PCI_ROM_SLOT) {
- config_ofs = 0x30;
- } else {
- config_ofs = 0x10 + i * 4;
- }
+
+ config_ofs = pci_bar_config_offset(d, i);
+
if (r->size != 0) {
if (r->type & PCI_ADDRESS_SPACE_IO) {
if (cmd & PCI_COMMAND_IO) {
@@ -1133,10 +1158,29 @@ static void pci_bridge_write_config(PCIDevice *d,
uint32_t address, uint32_t val, int len)
{
PCIBridge *s = (PCIBridge *)d;
+ PCIBus *bus = s->bus;
+ uint8_t *orig = pci_write_config_init(d, address, len);
+
+ pci_default_write_config_common(d, address, val, len);
- pci_default_write_config(d, address, val, len);
- s->bus->bus_num = d->config[PCI_SECONDARY_BUS];
- s->bus->sub_bus = d->config[PCI_SUBORDINATE_BUS];
+ if (pci_config_changed(orig, d->config, address, len,
+ PCI_BASE_ADDRESS_0, PCI_BASE_ADDRESS_2 + 4) ||
+ pci_config_changed_with_size(orig, d->config, address, len,
+ PCI_ROM_ADDRESS1, 4) ||
+ pci_config_changed_with_size(orig, d->config, address, len,
+ PCI_COMMAND, 1)) {
+ pci_update_mappings(d);
+ }
+ if (pci_config_changed_with_size(orig, d->config, address, len,
+ PCI_SECONDARY_BUS, 1)) {
+ bus->bus_num = d->config[PCI_SECONDARY_BUS];
+ }
+ if (pci_config_changed_with_size(orig, d->config, address, len,
+ PCI_SECONDARY_BUS, 1)) {
+ bus->sub_bus = d->config[PCI_SUBORDINATE_BUS];
+ }
+
+ pci_write_config_done(orig);
}
PCIBus *pci_find_bus(PCIBus *bus, int bus_num)
diff --git a/hw/pci.h b/hw/pci.h
index f19b7a8..645dacd 100644
--- a/hw/pci.h
+++ b/hw/pci.h
@@ -174,6 +174,7 @@ static inline int pci_bar_is_64bit(const PCIIORegion *r)
/* Header type 1 (PCI-to-PCI bridges) */
#define PCI_SUBORDINATE_BUS 0x1a /* Highest bus number behind the
bridge */
+#define PCI_ROM_ADDRESS1 0x38 /* Same as PCI_ROM_ADDRESS, but for
htype 1 */
/* Size of the standard PCI config header */
#define PCI_CONFIG_HEADER_SIZE 0x40
--
1.6.0.2
- [Qemu-devel] Re: [PATCH 02/25] pci: use appropriate PRIs in PCI_DPRINTF() for portability., (continued)
[Qemu-devel] [PATCH 03/25] pci: introduce constant PCI_NUM_PINS for the number of interrupt pins, 4., Isaku Yamahata, 2009/10/02
[Qemu-devel] [PATCH 16/25] pci: pcie host and mmcfg support., Isaku Yamahata, 2009/10/02
[Qemu-devel] [PATCH 19/25] pci: use helper function in pci_default_write_config(), Isaku Yamahata, 2009/10/02
[Qemu-devel] [PATCH 05/25] pci: use PCI_SLOT() and PCI_FUNC()., Isaku Yamahata, 2009/10/02
[Qemu-devel] [PATCH 21/25] pci: make bar update function aware of pci bridge.,
Isaku Yamahata <=
[Qemu-devel] [PATCH 01/25] pci: fix PCI_DPRINTF() wrt variadic macro., Isaku Yamahata, 2009/10/02
[Qemu-devel] [PATCH 06/25] pci: define a constant to represent a unmapped bar and use it., Isaku Yamahata, 2009/10/02
[Qemu-devel] [PATCH 17/25] pci: fix pci_default_write_config(), Isaku Yamahata, 2009/10/02
[Qemu-devel] [PATCH 12/25] pci: 64bit bar support., Isaku Yamahata, 2009/10/02