// SPDX-License-Identifier: GPL-2.0-or-later /* * Copyright (C) 2001 Dave Engebretsen, IBM Corporation * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM * * pSeries specific routines for PCI. */ #include <linux/init.h> #include <linux/ioport.h> #include <linux/kernel.h> #include <linux/pci.h> #include <linux/string.h> #include <asm/eeh.h> #include <asm/pci-bridge.h> #include <asm/prom.h> #include <asm/ppc-pci.h> #include <asm/pci.h> #include "pseries.h" #if 0 void pcibios_name_device(struct pci_dev *dev) { struct device_node *dn; /* * Add IBM loc code (slot) as a prefix to the device names for service */ dn = pci_device_to_OF_node(dev); if (dn) { const char *loc_code = of_get_property(dn, "ibm,loc-code", NULL); if (loc_code) { int loc_len = strlen(loc_code); if (loc_len < sizeof(dev->dev.name)) { memmove(dev->dev.name+loc_len+1, dev->dev.name, sizeof(dev->dev.name)-loc_len-1); memcpy(dev->dev.name, loc_code, loc_len); dev->dev.name[loc_len] = ' '; dev->dev.name[sizeof(dev->dev.name)-1] = '\0'; } } } } DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device); #endif #ifdef CONFIG_PCI_IOV #define MAX_VFS_FOR_MAP_PE 256 struct pe_map_bar_entry { __be64 bar; /* Input: Virtual Function BAR */ __be16 rid; /* Input: Virtual Function Router ID */ __be16 pe_num; /* Output: Virtual Function PE Number */ __be32 reserved; /* Reserved Space */ }; int pseries_send_map_pe(struct pci_dev *pdev, u16 num_vfs, struct pe_map_bar_entry *vf_pe_array) { struct pci_dn *pdn; int rc; unsigned long buid, addr; int ibm_map_pes = rtas_token("ibm,open-sriov-map-pe-number"); if (ibm_map_pes == RTAS_UNKNOWN_SERVICE) return -EINVAL; pdn = pci_get_pdn(pdev); addr = rtas_config_addr(pdn->busno, pdn->devfn, 0); buid = pdn->phb->buid; spin_lock(&rtas_data_buf_lock); memcpy(rtas_data_buf, vf_pe_array, RTAS_DATA_BUF_SIZE); rc = rtas_call(ibm_map_pes, 5, 1, NULL, addr, BUID_HI(buid), BUID_LO(buid), rtas_data_buf, num_vfs * sizeof(struct pe_map_bar_entry)); memcpy(vf_pe_array, rtas_data_buf, RTAS_DATA_BUF_SIZE); spin_unlock(&rtas_data_buf_lock); if (rc) dev_err(&pdev->dev, "%s: Failed to associate pes PE#%lx, rc=%x\n", __func__, addr, rc); return rc; } void pseries_set_pe_num(struct pci_dev *pdev, u16 vf_index, __be16 pe_num) { struct pci_dn *pdn; pdn = pci_get_pdn(pdev); pdn->pe_num_map[vf_index] = be16_to_cpu(pe_num); dev_dbg(&pdev->dev, "VF %04x:%02x:%02x.%x associated with PE#%x\n", pci_domain_nr(pdev->bus), pdev->bus->number, PCI_SLOT(pci_iov_virtfn_devfn(pdev, vf_index)), PCI_FUNC(pci_iov_virtfn_devfn(pdev, vf_index)), pdn->pe_num_map[vf_index]); } int pseries_associate_pes(struct pci_dev *pdev, u16 num_vfs) { struct pci_dn *pdn; int i, rc, vf_index; struct pe_map_bar_entry *vf_pe_array; struct resource *res; u64 size; vf_pe_array = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL); if (!vf_pe_array) return -ENOMEM; pdn = pci_get_pdn(pdev); /* create firmware structure to associate pes */ for (vf_index = 0; vf_index < num_vfs; vf_index++) { pdn->pe_num_map[vf_index] = IODA_INVALID_PE; for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) { res = &pdev->resource[i + PCI_IOV_RESOURCES]; if (!res->parent) continue; size = pcibios_iov_resource_alignment(pdev, i + PCI_IOV_RESOURCES); vf_pe_array[vf_index].bar = cpu_to_be64(res->start + size * vf_index); vf_pe_array[vf_index].rid = cpu_to_be16((pci_iov_virtfn_bus(pdev, vf_index) << 8) | pci_iov_virtfn_devfn(pdev, vf_index)); vf_pe_array[vf_index].pe_num = cpu_to_be16(IODA_INVALID_PE); } } rc = pseries_send_map_pe(pdev, num_vfs, vf_pe_array); /* Only zero is success */ if (!rc) for (vf_index = 0; vf_index < num_vfs; vf_index++) pseries_set_pe_num(pdev, vf_index, vf_pe_array[vf_index].pe_num); kfree(vf_pe_array); return rc; } int pseries_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs) { struct pci_dn *pdn; int rc; const int *max_vfs; int max_config_vfs; struct device_node *dn = pci_device_to_OF_node(pdev); max_vfs = of_get_property(dn, "ibm,number-of-configurable-vfs", NULL); if (!max_vfs) return -EINVAL; /* First integer stores max config */ max_config_vfs = of_read_number(&max_vfs[0], 1); if (max_config_vfs < num_vfs && num_vfs > MAX_VFS_FOR_MAP_PE) { dev_err(&pdev->dev, "Num VFs %x > %x Configurable VFs\n", num_vfs, (num_vfs > MAX_VFS_FOR_MAP_PE) ? MAX_VFS_FOR_MAP_PE : max_config_vfs); return -EINVAL; } pdn = pci_get_pdn(pdev); pdn->pe_num_map = kmalloc_array(num_vfs, sizeof(*pdn->pe_num_map), GFP_KERNEL); if (!pdn->pe_num_map) return -ENOMEM; rc = pseries_associate_pes(pdev, num_vfs); /* Anything other than zero is failure */ if (rc) { dev_err(&pdev->dev, "Failure to enable sriov: %x\n", rc); kfree(pdn->pe_num_map); } else { pci_vf_drivers_autoprobe(pdev, false); } return rc; } int pseries_pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs) { /* Allocate PCI data */ add_dev_pci_data(pdev); return pseries_pci_sriov_enable(pdev, num_vfs); } int pseries_pcibios_sriov_disable(struct pci_dev *pdev) { struct pci_dn *pdn; pdn = pci_get_pdn(pdev); /* Releasing pe_num_map */ kfree(pdn->pe_num_map); /* Release PCI data */ remove_dev_pci_data(pdev); pci_vf_drivers_autoprobe(pdev, true); return 0; } #endif static void __init pSeries_request_regions(void) { if (!isa_io_base) return; request_region(0x20,0x20,"pic1"); request_region(0xa0,0x20,"pic2"); request_region(0x00,0x20,"dma1"); request_region(0x40,0x20,"timer"); request_region(0x80,0x10,"dma page reg"); request_region(0xc0,0x20,"dma2"); } void __init pSeries_final_fixup(void) { struct pci_controller *hose; pSeries_request_regions(); eeh_show_enabled(); #ifdef CONFIG_PCI_IOV ppc_md.pcibios_sriov_enable = pseries_pcibios_sriov_enable; ppc_md.pcibios_sriov_disable = pseries_pcibios_sriov_disable; #endif list_for_each_entry(hose, &hose_list, list_node) { struct device_node *dn = hose->dn, *nvdn; while (1) { dn = of_find_all_nodes(dn); if (!dn) break; nvdn = of_parse_phandle(dn, "ibm,nvlink", 0); if (!nvdn) continue; if (!of_device_is_compatible(nvdn, "ibm,npu-link")) continue; if (!of_device_is_compatible(nvdn->parent, "ibm,power9-npu")) continue; #ifdef CONFIG_PPC_POWERNV WARN_ON_ONCE(pnv_npu2_init(hose)); #endif break; } } } /* * Assume the winbond 82c105 is the IDE controller on a * p610/p615/p630. We should probably be more careful in case * someone tries to plug in a similar adapter. */ static void fixup_winbond_82c105(struct pci_dev* dev) { int i; unsigned int reg; if (!machine_is(pseries)) return; printk("Using INTC for W82c105 IDE controller.\n"); pci_read_config_dword(dev, 0x40, ®); /* Enable LEGIRQ to use INTC instead of ISA interrupts */ pci_write_config_dword(dev, 0x40, reg | (1<<11)); for (i = 0; i < DEVICE_COUNT_RESOURCE; ++i) { /* zap the 2nd function of the winbond chip */ if (dev->resource[i].flags & IORESOURCE_IO && dev->bus->number == 0 && dev->devfn == 0x81) dev->resource[i].flags &= ~IORESOURCE_IO; if (dev->resource[i].start == 0 && dev->resource[i].end) { dev->resource[i].flags = 0; dev->resource[i].end = 0; } } } DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105, fixup_winbond_82c105); int pseries_root_bridge_prepare(struct pci_host_bridge *bridge) { struct device_node *dn, *pdn; struct pci_bus *bus; u32 pcie_link_speed_stats[2]; int rc; bus = bridge->bus; /* Rely on the pcibios_free_controller_deferred() callback. */ pci_set_host_bridge_release(bridge, pcibios_free_controller_deferred, (void *) pci_bus_to_host(bus)); dn = pcibios_get_phb_of_node(bus); if (!dn) return 0; for (pdn = dn; pdn != NULL; pdn = of_get_next_parent(pdn)) { rc = of_property_read_u32_array(pdn, "ibm,pcie-link-speed-stats", &pcie_link_speed_stats[0], 2); if (!rc) break; } of_node_put(pdn); if (rc) { pr_debug("no ibm,pcie-link-speed-stats property\n"); return 0; } switch (pcie_link_speed_stats[0]) { case 0x01: bus->max_bus_speed = PCIE_SPEED_2_5GT; break; case 0x02: bus->max_bus_speed = PCIE_SPEED_5_0GT; break; case 0x04: bus->max_bus_speed = PCIE_SPEED_8_0GT; break; default: bus->max_bus_speed = PCI_SPEED_UNKNOWN; break; } switch (pcie_link_speed_stats[1]) { case 0x01: bus->cur_bus_speed = PCIE_SPEED_2_5GT; break; case 0x02: bus->cur_bus_speed = PCIE_SPEED_5_0GT; break; case 0x04: bus->cur_bus_speed = PCIE_SPEED_8_0GT; break; default: bus->cur_bus_speed = PCI_SPEED_UNKNOWN; break; } return 0; }