void zpci_event_availability(void *data)
{
struct zpci_ccdf_avail *ccdf = data;
struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
struct pci_dev *pdev = zdev ? zdev->pdev : NULL;
int ret;
pr_info("%s: Event 0x%x reconfigured PCI function 0x%x\n",
pdev ? pci_name(pdev) : "n/a", ccdf->pec, ccdf->fid);
zpci_err("avail CCDF:\n");
zpci_err_hex(ccdf, sizeof(*ccdf));
switch (ccdf->pec) {
case 0x0301: /* Standby -> Configured */
if (!zdev || zdev->state == ZPCI_FN_STATE_CONFIGURED)
break;
zdev->state = ZPCI_FN_STATE_CONFIGURED;
ret = zpci_enable_device(zdev);
if (ret)
break;
pci_rescan_bus(zdev->bus);
break;
case 0x0302: /* Reserved -> Standby */
clp_add_pci_device(ccdf->fid, ccdf->fh, 0);
break;
case 0x0303: /* Deconfiguration requested */
if (pdev)
pci_stop_and_remove_bus_device(pdev);
ret = zpci_disable_device(zdev);
if (ret)
break;
ret = sclp_pci_deconfigure(zdev->fid);
zpci_dbg(3, "deconf fid:%x, rc:%d\n", zdev->fid, ret);
if (!ret)
zdev->state = ZPCI_FN_STATE_STANDBY;
break;
case 0x0304: /* Configured -> Standby */
if (pdev)
pci_stop_and_remove_bus_device(pdev);
zpci_disable_device(zdev);
zdev->state = ZPCI_FN_STATE_STANDBY;
break;
case 0x0306: /* 0x308 or 0x302 for multiple devices */
clp_rescan_pci_devices();
break;
case 0x0308: /* Standby -> Reserved */
pci_stop_root_bus(zdev->bus);
pci_remove_root_bus(zdev->bus);
break;
default:
break;
}
}
int iproc_pcie_remove(struct iproc_pcie *pcie)
{
pci_stop_root_bus(pcie->root_bus);
pci_remove_root_bus(pcie->root_bus);
phy_power_off(pcie->phy);
phy_exit(pcie->phy);
return 0;
}
void cxl_pci_vphb_remove(struct cxl_afu *afu)
{
struct pci_controller *phb;
/* If there is no configuration record we won't have one of these */
if (!afu || !afu->phb)
return;
phb = afu->phb;
afu->phb = NULL;
pci_remove_root_bus(phb->bus);
pcibios_free_controller(phb);
}
void cxl_pci_vphb_remove(struct cxl_afu *afu)
{
struct pci_controller *phb;
/* If there is no configuration record we won't have one of these */
if (!afu || !afu->phb)
return;
phb = afu->phb;
afu->phb = NULL;
pci_remove_root_bus(phb->bus);
/*
* We don't free phb here - that's handled by
* pcibios_free_controller_deferred()
*/
}
int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
{
int ret;
void *sysdata;
struct pci_bus *bus;
if (!pcie || !pcie->dev || !pcie->base)
return -EINVAL;
ret = phy_init(pcie->phy);
if (ret) {
dev_err(pcie->dev, "unable to initialize PCIe PHY\n");
return ret;
}
ret = phy_power_on(pcie->phy);
if (ret) {
dev_err(pcie->dev, "unable to power on PCIe PHY\n");
goto err_exit_phy;
}
iproc_pcie_reset(pcie);
#ifdef CONFIG_ARM
pcie->sysdata.private_data = pcie;
sysdata = &pcie->sysdata;
#else
sysdata = pcie;
#endif
bus = pci_create_root_bus(pcie->dev, 0, &iproc_pcie_ops, sysdata, res);
if (!bus) {
dev_err(pcie->dev, "unable to create PCI root bus\n");
ret = -ENOMEM;
goto err_power_off_phy;
}
pcie->root_bus = bus;
ret = iproc_pcie_check_link(pcie, bus);
if (ret) {
dev_err(pcie->dev, "no PCIe EP device detected\n");
goto err_rm_root_bus;
}
iproc_pcie_enable(pcie);
pci_scan_child_bus(bus);
pci_assign_unassigned_bus_resources(bus);
#ifdef CONFIG_ARM
pci_fixup_irqs(pci_common_swizzle, pcie->map_irq);
#endif
pci_bus_add_devices(bus);
return 0;
err_rm_root_bus:
pci_stop_root_bus(bus);
pci_remove_root_bus(bus);
err_power_off_phy:
phy_power_off(pcie->phy);
err_exit_phy:
phy_exit(pcie->phy);
return ret;
}
static void __zpci_event_availability(struct zpci_ccdf_avail *ccdf)
{
struct zpci_dev *zdev = get_zdev_by_fid(ccdf->fid);
struct pci_dev *pdev = NULL;
int ret;
if (zdev)
pdev = pci_get_slot(zdev->bus, ZPCI_DEVFN);
pr_info("%s: Event 0x%x reconfigured PCI function 0x%x\n",
pdev ? pci_name(pdev) : "n/a", ccdf->pec, ccdf->fid);
zpci_err("avail CCDF:\n");
zpci_err_hex(ccdf, sizeof(*ccdf));
switch (ccdf->pec) {
case 0x0301: /* Reserved|Standby -> Configured */
if (!zdev) {
ret = clp_add_pci_device(ccdf->fid, ccdf->fh, 0);
if (ret)
break;
zdev = get_zdev_by_fid(ccdf->fid);
}
if (!zdev || zdev->state != ZPCI_FN_STATE_STANDBY)
break;
zdev->state = ZPCI_FN_STATE_CONFIGURED;
zdev->fh = ccdf->fh;
ret = zpci_enable_device(zdev);
if (ret)
break;
pci_lock_rescan_remove();
pci_rescan_bus(zdev->bus);
pci_unlock_rescan_remove();
break;
case 0x0302: /* Reserved -> Standby */
if (!zdev)
clp_add_pci_device(ccdf->fid, ccdf->fh, 0);
break;
case 0x0303: /* Deconfiguration requested */
if (pdev)
pci_stop_and_remove_bus_device_locked(pdev);
ret = zpci_disable_device(zdev);
if (ret)
break;
ret = sclp_pci_deconfigure(zdev->fid);
zpci_dbg(3, "deconf fid:%x, rc:%d\n", zdev->fid, ret);
if (!ret)
zdev->state = ZPCI_FN_STATE_STANDBY;
break;
case 0x0304: /* Configured -> Standby */
if (pdev) {
/* Give the driver a hint that the function is
* already unusable. */
pdev->error_state = pci_channel_io_perm_failure;
pci_stop_and_remove_bus_device_locked(pdev);
}
zdev->fh = ccdf->fh;
zpci_disable_device(zdev);
zdev->state = ZPCI_FN_STATE_STANDBY;
break;
case 0x0306: /* 0x308 or 0x302 for multiple devices */
clp_rescan_pci_devices();
break;
case 0x0308: /* Standby -> Reserved */
if (!zdev)
break;
pci_stop_root_bus(zdev->bus);
pci_remove_root_bus(zdev->bus);
break;
default:
break;
}
if (pdev)
pci_dev_put(pdev);
}
int iproc_pcie_setup(struct iproc_pcie *pcie, struct list_head *res)
{
struct device *dev;
int ret;
void *sysdata;
struct pci_bus *bus;
dev = pcie->dev;
ret = devm_request_pci_bus_resources(dev, res);
if (ret)
return ret;
ret = phy_init(pcie->phy);
if (ret) {
dev_err(dev, "unable to initialize PCIe PHY\n");
return ret;
}
ret = phy_power_on(pcie->phy);
if (ret) {
dev_err(dev, "unable to power on PCIe PHY\n");
goto err_exit_phy;
}
switch (pcie->type) {
case IPROC_PCIE_PAXB:
pcie->reg_offsets = iproc_pcie_reg_paxb;
break;
case IPROC_PCIE_PAXC:
pcie->reg_offsets = iproc_pcie_reg_paxc;
break;
default:
dev_err(dev, "incompatible iProc PCIe interface\n");
ret = -EINVAL;
goto err_power_off_phy;
}
iproc_pcie_reset(pcie);
if (pcie->need_ob_cfg) {
ret = iproc_pcie_map_ranges(pcie, res);
if (ret) {
dev_err(dev, "map failed\n");
goto err_power_off_phy;
}
}
#ifdef CONFIG_ARM
pcie->sysdata.private_data = pcie;
sysdata = &pcie->sysdata;
#else
sysdata = pcie;
#endif
bus = pci_create_root_bus(dev, 0, &iproc_pcie_ops, sysdata, res);
if (!bus) {
dev_err(dev, "unable to create PCI root bus\n");
ret = -ENOMEM;
goto err_power_off_phy;
}
pcie->root_bus = bus;
ret = iproc_pcie_check_link(pcie, bus);
if (ret) {
dev_err(dev, "no PCIe EP device detected\n");
goto err_rm_root_bus;
}
iproc_pcie_enable(pcie);
if (IS_ENABLED(CONFIG_PCI_MSI))
if (iproc_pcie_msi_enable(pcie))
dev_info(dev, "not using iProc MSI\n");
pci_scan_child_bus(bus);
pci_assign_unassigned_bus_resources(bus);
pci_fixup_irqs(pci_common_swizzle, pcie->map_irq);
pci_bus_add_devices(bus);
return 0;
err_rm_root_bus:
pci_stop_root_bus(bus);
pci_remove_root_bus(bus);
err_power_off_phy:
phy_power_off(pcie->phy);
err_exit_phy:
phy_exit(pcie->phy);
return ret;
}
