diff options
Diffstat (limited to 'drivers/cxl/core/pci.c')
| -rw-r--r-- | drivers/cxl/core/pci.c | 87 |
1 files changed, 8 insertions, 79 deletions
diff --git a/drivers/cxl/core/pci.c b/drivers/cxl/core/pci.c index 18825e1505d6..5b023a0178a4 100644 --- a/drivers/cxl/core/pci.c +++ b/drivers/cxl/core/pci.c @@ -71,85 +71,6 @@ struct cxl_dport *__devm_cxl_add_dport_by_dev(struct cxl_port *port, } EXPORT_SYMBOL_NS_GPL(__devm_cxl_add_dport_by_dev, "CXL"); -struct cxl_walk_context { - struct pci_bus *bus; - struct cxl_port *port; - int type; - int error; - int count; -}; - -static int match_add_dports(struct pci_dev *pdev, void *data) -{ - struct cxl_walk_context *ctx = data; - struct cxl_port *port = ctx->port; - int type = pci_pcie_type(pdev); - struct cxl_register_map map; - struct cxl_dport *dport; - u32 lnkcap, port_num; - int rc; - - if (pdev->bus != ctx->bus) - return 0; - if (!pci_is_pcie(pdev)) - return 0; - if (type != ctx->type) - return 0; - if (pci_read_config_dword(pdev, pci_pcie_cap(pdev) + PCI_EXP_LNKCAP, - &lnkcap)) - return 0; - - rc = cxl_find_regblock(pdev, CXL_REGLOC_RBI_COMPONENT, &map); - if (rc) - dev_dbg(&port->dev, "failed to find component registers\n"); - - port_num = FIELD_GET(PCI_EXP_LNKCAP_PN, lnkcap); - dport = devm_cxl_add_dport(port, &pdev->dev, port_num, map.resource); - if (IS_ERR(dport)) { - ctx->error = PTR_ERR(dport); - return PTR_ERR(dport); - } - ctx->count++; - - return 0; -} - -/** - * devm_cxl_port_enumerate_dports - enumerate downstream ports of the upstream port - * @port: cxl_port whose ->uport_dev is the upstream of dports to be enumerated - * - * Returns a positive number of dports enumerated or a negative error - * code. - */ -int devm_cxl_port_enumerate_dports(struct cxl_port *port) -{ - struct pci_bus *bus = cxl_port_to_pci_bus(port); - struct cxl_walk_context ctx; - int type; - - if (!bus) - return -ENXIO; - - if (pci_is_root_bus(bus)) - type = PCI_EXP_TYPE_ROOT_PORT; - else - type = PCI_EXP_TYPE_DOWNSTREAM; - - ctx = (struct cxl_walk_context) { - .port = port, - .bus = bus, - .type = type, - }; - pci_walk_bus(bus, match_add_dports, &ctx); - - if (ctx.count == 0) - return -ENODEV; - if (ctx.error) - return ctx.error; - return ctx.count; -} -EXPORT_SYMBOL_NS_GPL(devm_cxl_port_enumerate_dports, "CXL"); - static int cxl_dvsec_mem_range_valid(struct cxl_dev_state *cxlds, int id) { struct pci_dev *pdev = to_pci_dev(cxlds->dev); @@ -1217,6 +1138,14 @@ int cxl_gpf_port_setup(struct cxl_dport *dport) return 0; } +struct cxl_walk_context { + struct pci_bus *bus; + struct cxl_port *port; + int type; + int error; + int count; +}; + static int count_dports(struct pci_dev *pdev, void *data) { struct cxl_walk_context *ctx = data; |
