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hw/pcie: implement power controller functionality

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It is needed by hot-unplug in order to get an indication
from the OS when the device can be physically detached.

Signed-off-by: Marcel Apfelbaum <marcel.a@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Marcel Apfelbaum 2014-06-23 17:32:48 +03:00 • committed by Michael S. Tsirkin
parent e4bcd27c86
commit f23b6bdc3c
7 changed files with 62 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

33
hw/pci/pcie.c
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@ -294,6 +294,15 @@ void pcie_cap_slot_init(PCIDevice *dev, uint16_t slot)
PCI_EXP_SLTCAP_AIP |
PCI_EXP_SLTCAP_ABP);
if (dev->cap_present & QEMU_PCIE_SLTCAP_PCP) {
pci_long_test_and_set_mask(dev->config + pos + PCI_EXP_SLTCAP,
PCI_EXP_SLTCAP_PCP);
pci_word_test_and_clear_mask(dev->config + pos + PCI_EXP_SLTCTL,
PCI_EXP_SLTCTL_PCC);
pci_word_test_and_set_mask(dev->wmask + pos + PCI_EXP_SLTCTL,
PCI_EXP_SLTCTL_PCC);
}
pci_word_test_and_clear_mask(dev->config + pos + PCI_EXP_SLTCTL,
PCI_EXP_SLTCTL_PIC |
PCI_EXP_SLTCTL_AIC);
@ -327,6 +336,10 @@ void pcie_cap_slot_init(PCIDevice *dev, uint16_t slot)
void pcie_cap_slot_reset(PCIDevice *dev)
{
uint8_t *exp_cap = dev->config + dev->exp.exp_cap;
uint8_t port_type = pcie_cap_get_type(dev);
assert(port_type == PCI_EXP_TYPE_DOWNSTREAM ||
port_type == PCI_EXP_TYPE_ROOT_PORT);
PCIE_DEV_PRINTF(dev, "reset\n");
@ -339,9 +352,27 @@ void pcie_cap_slot_reset(PCIDevice *dev)
PCI_EXP_SLTCTL_PDCE |
PCI_EXP_SLTCTL_ABPE);
pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTCTL,
PCI_EXP_SLTCTL_PIC_OFF |
PCI_EXP_SLTCTL_AIC_OFF);
if (dev->cap_present & QEMU_PCIE_SLTCAP_PCP) {
bool populated;
uint16_t pic;
/* Downstream ports enforce device number 0. */
populated = (pci_bridge_get_sec_bus(PCI_BRIDGE(dev))->devices[0] != NULL);
if (populated) {
pci_word_test_and_clear_mask(exp_cap + PCI_EXP_SLTCTL,
PCI_EXP_SLTCTL_PCC);
} else {
pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTCTL,
PCI_EXP_SLTCTL_PCC);
}
pic = populated ? PCI_EXP_SLTCTL_PIC_ON : PCI_EXP_SLTCTL_PIC_OFF;
pci_word_test_and_set_mask(exp_cap + PCI_EXP_SLTCTL, pic);
}
pci_word_test_and_clear_mask(exp_cap + PCI_EXP_SLTSTA,
PCI_EXP_SLTSTA_EIS |/* on reset,
the lock is released */