| /* |
| * Support PCI/PCIe on PowerNV platforms |
| * |
| * Copyright 2011 Benjamin Herrenschmidt, IBM Corp. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License |
| * as published by the Free Software Foundation; either version |
| * 2 of the License, or (at your option) any later version. |
| */ |
| |
| #undef DEBUG |
| |
| #include <linux/kernel.h> |
| #include <linux/pci.h> |
| #include <linux/crash_dump.h> |
| #include <linux/debugfs.h> |
| #include <linux/delay.h> |
| #include <linux/string.h> |
| #include <linux/init.h> |
| #include <linux/bootmem.h> |
| #include <linux/irq.h> |
| #include <linux/io.h> |
| #include <linux/msi.h> |
| #include <linux/memblock.h> |
| |
| #include <asm/sections.h> |
| #include <asm/io.h> |
| #include <asm/prom.h> |
| #include <asm/pci-bridge.h> |
| #include <asm/machdep.h> |
| #include <asm/msi_bitmap.h> |
| #include <asm/ppc-pci.h> |
| #include <asm/opal.h> |
| #include <asm/iommu.h> |
| #include <asm/tce.h> |
| #include <asm/xics.h> |
| #include <asm/debug.h> |
| #include <asm/firmware.h> |
| #include <asm/pnv-pci.h> |
| |
| #include <misc/cxl.h> |
| |
| #include "powernv.h" |
| #include "pci.h" |
| |
| static void pe_level_printk(const struct pnv_ioda_pe *pe, const char *level, |
| const char *fmt, ...) |
| { |
| struct va_format vaf; |
| va_list args; |
| char pfix[32]; |
| |
| va_start(args, fmt); |
| |
| vaf.fmt = fmt; |
| vaf.va = &args; |
| |
| if (pe->pdev) |
| strlcpy(pfix, dev_name(&pe->pdev->dev), sizeof(pfix)); |
| else |
| sprintf(pfix, "%04x:%02x ", |
| pci_domain_nr(pe->pbus), pe->pbus->number); |
| |
| printk("%spci %s: [PE# %.3d] %pV", |
| level, pfix, pe->pe_number, &vaf); |
| |
| va_end(args); |
| } |
| |
| #define pe_err(pe, fmt, ...) \ |
| pe_level_printk(pe, KERN_ERR, fmt, ##__VA_ARGS__) |
| #define pe_warn(pe, fmt, ...) \ |
| pe_level_printk(pe, KERN_WARNING, fmt, ##__VA_ARGS__) |
| #define pe_info(pe, fmt, ...) \ |
| pe_level_printk(pe, KERN_INFO, fmt, ##__VA_ARGS__) |
| |
| static bool pnv_iommu_bypass_disabled __read_mostly; |
| |
| static int __init iommu_setup(char *str) |
| { |
| if (!str) |
| return -EINVAL; |
| |
| while (*str) { |
| if (!strncmp(str, "nobypass", 8)) { |
| pnv_iommu_bypass_disabled = true; |
| pr_info("PowerNV: IOMMU bypass window disabled.\n"); |
| break; |
| } |
| str += strcspn(str, ","); |
| if (*str == ',') |
| str++; |
| } |
| |
| return 0; |
| } |
| early_param("iommu", iommu_setup); |
| |
| /* |
| * stdcix is only supposed to be used in hypervisor real mode as per |
| * the architecture spec |
| */ |
| static inline void __raw_rm_writeq(u64 val, volatile void __iomem *paddr) |
| { |
| __asm__ __volatile__("stdcix %0,0,%1" |
| : : "r" (val), "r" (paddr) : "memory"); |
| } |
| |
| static inline bool pnv_pci_is_mem_pref_64(unsigned long flags) |
| { |
| return ((flags & (IORESOURCE_MEM_64 | IORESOURCE_PREFETCH)) == |
| (IORESOURCE_MEM_64 | IORESOURCE_PREFETCH)); |
| } |
| |
| static void pnv_ioda_reserve_pe(struct pnv_phb *phb, int pe_no) |
| { |
| if (!(pe_no >= 0 && pe_no < phb->ioda.total_pe)) { |
| pr_warn("%s: Invalid PE %d on PHB#%x\n", |
| __func__, pe_no, phb->hose->global_number); |
| return; |
| } |
| |
| if (test_and_set_bit(pe_no, phb->ioda.pe_alloc)) { |
| pr_warn("%s: PE %d was assigned on PHB#%x\n", |
| __func__, pe_no, phb->hose->global_number); |
| return; |
| } |
| |
| phb->ioda.pe_array[pe_no].phb = phb; |
| phb->ioda.pe_array[pe_no].pe_number = pe_no; |
| } |
| |
| static int pnv_ioda_alloc_pe(struct pnv_phb *phb) |
| { |
| unsigned long pe; |
| |
| do { |
| pe = find_next_zero_bit(phb->ioda.pe_alloc, |
| phb->ioda.total_pe, 0); |
| if (pe >= phb->ioda.total_pe) |
| return IODA_INVALID_PE; |
| } while(test_and_set_bit(pe, phb->ioda.pe_alloc)); |
| |
| phb->ioda.pe_array[pe].phb = phb; |
| phb->ioda.pe_array[pe].pe_number = pe; |
| return pe; |
| } |
| |
| static void pnv_ioda_free_pe(struct pnv_phb *phb, int pe) |
| { |
| WARN_ON(phb->ioda.pe_array[pe].pdev); |
| |
| memset(&phb->ioda.pe_array[pe], 0, sizeof(struct pnv_ioda_pe)); |
| clear_bit(pe, phb->ioda.pe_alloc); |
| } |
| |
| /* The default M64 BAR is shared by all PEs */ |
| static int pnv_ioda2_init_m64(struct pnv_phb *phb) |
| { |
| const char *desc; |
| struct resource *r; |
| s64 rc; |
| |
| /* Configure the default M64 BAR */ |
| rc = opal_pci_set_phb_mem_window(phb->opal_id, |
| OPAL_M64_WINDOW_TYPE, |
| phb->ioda.m64_bar_idx, |
| phb->ioda.m64_base, |
| 0, /* unused */ |
| phb->ioda.m64_size); |
| if (rc != OPAL_SUCCESS) { |
| desc = "configuring"; |
| goto fail; |
| } |
| |
| /* Enable the default M64 BAR */ |
| rc = opal_pci_phb_mmio_enable(phb->opal_id, |
| OPAL_M64_WINDOW_TYPE, |
| phb->ioda.m64_bar_idx, |
| OPAL_ENABLE_M64_SPLIT); |
| if (rc != OPAL_SUCCESS) { |
| desc = "enabling"; |
| goto fail; |
| } |
| |
| /* Mark the M64 BAR assigned */ |
| set_bit(phb->ioda.m64_bar_idx, &phb->ioda.m64_bar_alloc); |
| |
| /* |
| * Strip off the segment used by the reserved PE, which is |
| * expected to be 0 or last one of PE capabicity. |
| */ |
| r = &phb->hose->mem_resources[1]; |
| if (phb->ioda.reserved_pe == 0) |
| r->start += phb->ioda.m64_segsize; |
| else if (phb->ioda.reserved_pe == (phb->ioda.total_pe - 1)) |
| r->end -= phb->ioda.m64_segsize; |
| else |
| pr_warn(" Cannot strip M64 segment for reserved PE#%d\n", |
| phb->ioda.reserved_pe); |
| |
| return 0; |
| |
| fail: |
| pr_warn(" Failure %lld %s M64 BAR#%d\n", |
| rc, desc, phb->ioda.m64_bar_idx); |
| opal_pci_phb_mmio_enable(phb->opal_id, |
| OPAL_M64_WINDOW_TYPE, |
| phb->ioda.m64_bar_idx, |
| OPAL_DISABLE_M64); |
| return -EIO; |
| } |
| |
| static void pnv_ioda2_reserve_m64_pe(struct pnv_phb *phb) |
| { |
| resource_size_t sgsz = phb->ioda.m64_segsize; |
| struct pci_dev *pdev; |
| struct resource *r; |
| int base, step, i; |
| |
| /* |
| * Root bus always has full M64 range and root port has |
| * M64 range used in reality. So we're checking root port |
| * instead of root bus. |
| */ |
| list_for_each_entry(pdev, &phb->hose->bus->devices, bus_list) { |
| for (i = 0; i < PCI_BRIDGE_RESOURCE_NUM; i++) { |
| r = &pdev->resource[PCI_BRIDGE_RESOURCES + i]; |
| if (!r->parent || |
| !pnv_pci_is_mem_pref_64(r->flags)) |
| continue; |
| |
| base = (r->start - phb->ioda.m64_base) / sgsz; |
| for (step = 0; step < resource_size(r) / sgsz; step++) |
| pnv_ioda_reserve_pe(phb, base + step); |
| } |
| } |
| } |
| |
| static int pnv_ioda2_pick_m64_pe(struct pnv_phb *phb, |
| struct pci_bus *bus, int all) |
| { |
| resource_size_t segsz = phb->ioda.m64_segsize; |
| struct pci_dev *pdev; |
| struct resource *r; |
| struct pnv_ioda_pe *master_pe, *pe; |
| unsigned long size, *pe_alloc; |
| bool found; |
| int start, i, j; |
| |
| /* Root bus shouldn't use M64 */ |
| if (pci_is_root_bus(bus)) |
| return IODA_INVALID_PE; |
| |
| /* We support only one M64 window on each bus */ |
| found = false; |
| pci_bus_for_each_resource(bus, r, i) { |
| if (r && r->parent && |
| pnv_pci_is_mem_pref_64(r->flags)) { |
| found = true; |
| break; |
| } |
| } |
| |
| /* No M64 window found ? */ |
| if (!found) |
| return IODA_INVALID_PE; |
| |
| /* Allocate bitmap */ |
| size = _ALIGN_UP(phb->ioda.total_pe / 8, sizeof(unsigned long)); |
| pe_alloc = kzalloc(size, GFP_KERNEL); |
| if (!pe_alloc) { |
| pr_warn("%s: Out of memory !\n", |
| __func__); |
| return IODA_INVALID_PE; |
| } |
| |
| /* |
| * Figure out reserved PE numbers by the PE |
| * the its child PEs. |
| */ |
| start = (r->start - phb->ioda.m64_base) / segsz; |
| for (i = 0; i < resource_size(r) / segsz; i++) |
| set_bit(start + i, pe_alloc); |
| |
| if (all) |
| goto done; |
| |
| /* |
| * If the PE doesn't cover all subordinate buses, |
| * we need subtract from reserved PEs for children. |
| */ |
| list_for_each_entry(pdev, &bus->devices, bus_list) { |
| if (!pdev->subordinate) |
| continue; |
| |
| pci_bus_for_each_resource(pdev->subordinate, r, i) { |
| if (!r || !r->parent || |
| !pnv_pci_is_mem_pref_64(r->flags)) |
| continue; |
| |
| start = (r->start - phb->ioda.m64_base) / segsz; |
| for (j = 0; j < resource_size(r) / segsz ; j++) |
| clear_bit(start + j, pe_alloc); |
| } |
| } |
| |
| /* |
| * the current bus might not own M64 window and that's all |
| * contributed by its child buses. For the case, we needn't |
| * pick M64 dependent PE#. |
| */ |
| if (bitmap_empty(pe_alloc, phb->ioda.total_pe)) { |
| kfree(pe_alloc); |
| return IODA_INVALID_PE; |
| } |
| |
| /* |
| * Figure out the master PE and put all slave PEs to master |
| * PE's list to form compound PE. |
| */ |
| done: |
| master_pe = NULL; |
| i = -1; |
| while ((i = find_next_bit(pe_alloc, phb->ioda.total_pe, i + 1)) < |
| phb->ioda.total_pe) { |
| pe = &phb->ioda.pe_array[i]; |
| |
| if (!master_pe) { |
| pe->flags |= PNV_IODA_PE_MASTER; |
| INIT_LIST_HEAD(&pe->slaves); |
| master_pe = pe; |
| } else { |
| pe->flags |= PNV_IODA_PE_SLAVE; |
| pe->master = master_pe; |
| list_add_tail(&pe->list, &master_pe->slaves); |
| } |
| } |
| |
| kfree(pe_alloc); |
| return master_pe->pe_number; |
| } |
| |
| static void __init pnv_ioda_parse_m64_window(struct pnv_phb *phb) |
| { |
| struct pci_controller *hose = phb->hose; |
| struct device_node *dn = hose->dn; |
| struct resource *res; |
| const u32 *r; |
| u64 pci_addr; |
| |
| /* FIXME: Support M64 for P7IOC */ |
| if (phb->type != PNV_PHB_IODA2) { |
| pr_info(" Not support M64 window\n"); |
| return; |
| } |
| |
| if (!firmware_has_feature(FW_FEATURE_OPALv3)) { |
| pr_info(" Firmware too old to support M64 window\n"); |
| return; |
| } |
| |
| r = of_get_property(dn, "ibm,opal-m64-window", NULL); |
| if (!r) { |
| pr_info(" No <ibm,opal-m64-window> on %s\n", |
| dn->full_name); |
| return; |
| } |
| |
| res = &hose->mem_resources[1]; |
| res->start = of_translate_address(dn, r + 2); |
| res->end = res->start + of_read_number(r + 4, 2) - 1; |
| res->flags = (IORESOURCE_MEM | IORESOURCE_MEM_64 | IORESOURCE_PREFETCH); |
| pci_addr = of_read_number(r, 2); |
| hose->mem_offset[1] = res->start - pci_addr; |
| |
| phb->ioda.m64_size = resource_size(res); |
| phb->ioda.m64_segsize = phb->ioda.m64_size / phb->ioda.total_pe; |
| phb->ioda.m64_base = pci_addr; |
| |
| pr_info(" MEM64 0x%016llx..0x%016llx -> 0x%016llx\n", |
| res->start, res->end, pci_addr); |
| |
| /* Use last M64 BAR to cover M64 window */ |
| phb->ioda.m64_bar_idx = 15; |
| phb->init_m64 = pnv_ioda2_init_m64; |
| phb->reserve_m64_pe = pnv_ioda2_reserve_m64_pe; |
| phb->pick_m64_pe = pnv_ioda2_pick_m64_pe; |
| } |
| |
| static void pnv_ioda_freeze_pe(struct pnv_phb *phb, int pe_no) |
| { |
| struct pnv_ioda_pe *pe = &phb->ioda.pe_array[pe_no]; |
| struct pnv_ioda_pe *slave; |
| s64 rc; |
| |
| /* Fetch master PE */ |
| if (pe->flags & PNV_IODA_PE_SLAVE) { |
| pe = pe->master; |
| if (WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER))) |
| return; |
| |
| pe_no = pe->pe_number; |
| } |
| |
| /* Freeze master PE */ |
| rc = opal_pci_eeh_freeze_set(phb->opal_id, |
| pe_no, |
| OPAL_EEH_ACTION_SET_FREEZE_ALL); |
| if (rc != OPAL_SUCCESS) { |
| pr_warn("%s: Failure %lld freezing PHB#%x-PE#%x\n", |
| __func__, rc, phb->hose->global_number, pe_no); |
| return; |
| } |
| |
| /* Freeze slave PEs */ |
| if (!(pe->flags & PNV_IODA_PE_MASTER)) |
| return; |
| |
| list_for_each_entry(slave, &pe->slaves, list) { |
| rc = opal_pci_eeh_freeze_set(phb->opal_id, |
| slave->pe_number, |
| OPAL_EEH_ACTION_SET_FREEZE_ALL); |
| if (rc != OPAL_SUCCESS) |
| pr_warn("%s: Failure %lld freezing PHB#%x-PE#%x\n", |
| __func__, rc, phb->hose->global_number, |
| slave->pe_number); |
| } |
| } |
| |
| static int pnv_ioda_unfreeze_pe(struct pnv_phb *phb, int pe_no, int opt) |
| { |
| struct pnv_ioda_pe *pe, *slave; |
| s64 rc; |
| |
| /* Find master PE */ |
| pe = &phb->ioda.pe_array[pe_no]; |
| if (pe->flags & PNV_IODA_PE_SLAVE) { |
| pe = pe->master; |
| WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER)); |
| pe_no = pe->pe_number; |
| } |
| |
| /* Clear frozen state for master PE */ |
| rc = opal_pci_eeh_freeze_clear(phb->opal_id, pe_no, opt); |
| if (rc != OPAL_SUCCESS) { |
| pr_warn("%s: Failure %lld clear %d on PHB#%x-PE#%x\n", |
| __func__, rc, opt, phb->hose->global_number, pe_no); |
| return -EIO; |
| } |
| |
| if (!(pe->flags & PNV_IODA_PE_MASTER)) |
| return 0; |
| |
| /* Clear frozen state for slave PEs */ |
| list_for_each_entry(slave, &pe->slaves, list) { |
| rc = opal_pci_eeh_freeze_clear(phb->opal_id, |
| slave->pe_number, |
| opt); |
| if (rc != OPAL_SUCCESS) { |
| pr_warn("%s: Failure %lld clear %d on PHB#%x-PE#%x\n", |
| __func__, rc, opt, phb->hose->global_number, |
| slave->pe_number); |
| return -EIO; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int pnv_ioda_get_pe_state(struct pnv_phb *phb, int pe_no) |
| { |
| struct pnv_ioda_pe *slave, *pe; |
| u8 fstate, state; |
| __be16 pcierr; |
| s64 rc; |
| |
| /* Sanity check on PE number */ |
| if (pe_no < 0 || pe_no >= phb->ioda.total_pe) |
| return OPAL_EEH_STOPPED_PERM_UNAVAIL; |
| |
| /* |
| * Fetch the master PE and the PE instance might be |
| * not initialized yet. |
| */ |
| pe = &phb->ioda.pe_array[pe_no]; |
| if (pe->flags & PNV_IODA_PE_SLAVE) { |
| pe = pe->master; |
| WARN_ON(!pe || !(pe->flags & PNV_IODA_PE_MASTER)); |
| pe_no = pe->pe_number; |
| } |
| |
| /* Check the master PE */ |
| rc = opal_pci_eeh_freeze_status(phb->opal_id, pe_no, |
| &state, &pcierr, NULL); |
| if (rc != OPAL_SUCCESS) { |
| pr_warn("%s: Failure %lld getting " |
| "PHB#%x-PE#%x state\n", |
| __func__, rc, |
| phb->hose->global_number, pe_no); |
| return OPAL_EEH_STOPPED_TEMP_UNAVAIL; |
| } |
| |
| /* Check the slave PE */ |
| if (!(pe->flags & PNV_IODA_PE_MASTER)) |
| return state; |
| |
| list_for_each_entry(slave, &pe->slaves, list) { |
| rc = opal_pci_eeh_freeze_status(phb->opal_id, |
| slave->pe_number, |
| &fstate, |
| &pcierr, |
| NULL); |
| if (rc != OPAL_SUCCESS) { |
| pr_warn("%s: Failure %lld getting " |
| "PHB#%x-PE#%x state\n", |
| __func__, rc, |
| phb->hose->global_number, slave->pe_number); |
| return OPAL_EEH_STOPPED_TEMP_UNAVAIL; |
| } |
| |
| /* |
| * Override the result based on the ascending |
| * priority. |
| */ |
| if (fstate > state) |
| state = fstate; |
| } |
| |
| return state; |
| } |
| |
| /* Currently those 2 are only used when MSIs are enabled, this will change |
| * but in the meantime, we need to protect them to avoid warnings |
| */ |
| #ifdef CONFIG_PCI_MSI |
| static struct pnv_ioda_pe *pnv_ioda_get_pe(struct pci_dev *dev) |
| { |
| struct pci_controller *hose = pci_bus_to_host(dev->bus); |
| struct pnv_phb *phb = hose->private_data; |
| struct pci_dn *pdn = pci_get_pdn(dev); |
| |
| if (!pdn) |
| return NULL; |
| if (pdn->pe_number == IODA_INVALID_PE) |
| return NULL; |
| return &phb->ioda.pe_array[pdn->pe_number]; |
| } |
| #endif /* CONFIG_PCI_MSI */ |
| |
| static int pnv_ioda_set_one_peltv(struct pnv_phb *phb, |
| struct pnv_ioda_pe *parent, |
| struct pnv_ioda_pe *child, |
| bool is_add) |
| { |
| const char *desc = is_add ? "adding" : "removing"; |
| uint8_t op = is_add ? OPAL_ADD_PE_TO_DOMAIN : |
| OPAL_REMOVE_PE_FROM_DOMAIN; |
| struct pnv_ioda_pe *slave; |
| long rc; |
| |
| /* Parent PE affects child PE */ |
| rc = opal_pci_set_peltv(phb->opal_id, parent->pe_number, |
| child->pe_number, op); |
| if (rc != OPAL_SUCCESS) { |
| pe_warn(child, "OPAL error %ld %s to parent PELTV\n", |
| rc, desc); |
| return -ENXIO; |
| } |
| |
| if (!(child->flags & PNV_IODA_PE_MASTER)) |
| return 0; |
| |
| /* Compound case: parent PE affects slave PEs */ |
| list_for_each_entry(slave, &child->slaves, list) { |
| rc = opal_pci_set_peltv(phb->opal_id, parent->pe_number, |
| slave->pe_number, op); |
| if (rc != OPAL_SUCCESS) { |
| pe_warn(slave, "OPAL error %ld %s to parent PELTV\n", |
| rc, desc); |
| return -ENXIO; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int pnv_ioda_set_peltv(struct pnv_phb *phb, |
| struct pnv_ioda_pe *pe, |
| bool is_add) |
| { |
| struct pnv_ioda_pe *slave; |
| struct pci_dev *pdev; |
| int ret; |
| |
| /* |
| * Clear PE frozen state. If it's master PE, we need |
| * clear slave PE frozen state as well. |
| */ |
| if (is_add) { |
| opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number, |
| OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); |
| if (pe->flags & PNV_IODA_PE_MASTER) { |
| list_for_each_entry(slave, &pe->slaves, list) |
| opal_pci_eeh_freeze_clear(phb->opal_id, |
| slave->pe_number, |
| OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); |
| } |
| } |
| |
| /* |
| * Associate PE in PELT. We need add the PE into the |
| * corresponding PELT-V as well. Otherwise, the error |
| * originated from the PE might contribute to other |
| * PEs. |
| */ |
| ret = pnv_ioda_set_one_peltv(phb, pe, pe, is_add); |
| if (ret) |
| return ret; |
| |
| /* For compound PEs, any one affects all of them */ |
| if (pe->flags & PNV_IODA_PE_MASTER) { |
| list_for_each_entry(slave, &pe->slaves, list) { |
| ret = pnv_ioda_set_one_peltv(phb, slave, pe, is_add); |
| if (ret) |
| return ret; |
| } |
| } |
| |
| if (pe->flags & (PNV_IODA_PE_BUS_ALL | PNV_IODA_PE_BUS)) |
| pdev = pe->pbus->self; |
| else |
| pdev = pe->pdev->bus->self; |
| while (pdev) { |
| struct pci_dn *pdn = pci_get_pdn(pdev); |
| struct pnv_ioda_pe *parent; |
| |
| if (pdn && pdn->pe_number != IODA_INVALID_PE) { |
| parent = &phb->ioda.pe_array[pdn->pe_number]; |
| ret = pnv_ioda_set_one_peltv(phb, parent, pe, is_add); |
| if (ret) |
| return ret; |
| } |
| |
| pdev = pdev->bus->self; |
| } |
| |
| return 0; |
| } |
| |
| static int pnv_ioda_configure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe) |
| { |
| struct pci_dev *parent; |
| uint8_t bcomp, dcomp, fcomp; |
| long rc, rid_end, rid; |
| |
| /* Bus validation ? */ |
| if (pe->pbus) { |
| int count; |
| |
| dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER; |
| fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER; |
| parent = pe->pbus->self; |
| if (pe->flags & PNV_IODA_PE_BUS_ALL) |
| count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1; |
| else |
| count = 1; |
| |
| switch(count) { |
| case 1: bcomp = OpalPciBusAll; break; |
| case 2: bcomp = OpalPciBus7Bits; break; |
| case 4: bcomp = OpalPciBus6Bits; break; |
| case 8: bcomp = OpalPciBus5Bits; break; |
| case 16: bcomp = OpalPciBus4Bits; break; |
| case 32: bcomp = OpalPciBus3Bits; break; |
| default: |
| pr_err("%s: Number of subordinate busses %d" |
| " unsupported\n", |
| pci_name(pe->pbus->self), count); |
| /* Do an exact match only */ |
| bcomp = OpalPciBusAll; |
| } |
| rid_end = pe->rid + (count << 8); |
| } else { |
| parent = pe->pdev->bus->self; |
| bcomp = OpalPciBusAll; |
| dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER; |
| fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER; |
| rid_end = pe->rid + 1; |
| } |
| |
| /* |
| * Associate PE in PELT. We need add the PE into the |
| * corresponding PELT-V as well. Otherwise, the error |
| * originated from the PE might contribute to other |
| * PEs. |
| */ |
| rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid, |
| bcomp, dcomp, fcomp, OPAL_MAP_PE); |
| if (rc) { |
| pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc); |
| return -ENXIO; |
| } |
| |
| /* Configure PELTV */ |
| pnv_ioda_set_peltv(phb, pe, true); |
| |
| /* Setup reverse map */ |
| for (rid = pe->rid; rid < rid_end; rid++) |
| phb->ioda.pe_rmap[rid] = pe->pe_number; |
| |
| /* Setup one MVTs on IODA1 */ |
| if (phb->type != PNV_PHB_IODA1) { |
| pe->mve_number = 0; |
| goto out; |
| } |
| |
| pe->mve_number = pe->pe_number; |
| rc = opal_pci_set_mve(phb->opal_id, pe->mve_number, pe->pe_number); |
| if (rc != OPAL_SUCCESS) { |
| pe_err(pe, "OPAL error %ld setting up MVE %d\n", |
| rc, pe->mve_number); |
| pe->mve_number = -1; |
| } else { |
| rc = opal_pci_set_mve_enable(phb->opal_id, |
| pe->mve_number, OPAL_ENABLE_MVE); |
| if (rc) { |
| pe_err(pe, "OPAL error %ld enabling MVE %d\n", |
| rc, pe->mve_number); |
| pe->mve_number = -1; |
| } |
| } |
| |
| out: |
| return 0; |
| } |
| |
| static void pnv_ioda_link_pe_by_weight(struct pnv_phb *phb, |
| struct pnv_ioda_pe *pe) |
| { |
| struct pnv_ioda_pe *lpe; |
| |
| list_for_each_entry(lpe, &phb->ioda.pe_dma_list, dma_link) { |
| if (lpe->dma_weight < pe->dma_weight) { |
| list_add_tail(&pe->dma_link, &lpe->dma_link); |
| return; |
| } |
| } |
| list_add_tail(&pe->dma_link, &phb->ioda.pe_dma_list); |
| } |
| |
| static unsigned int pnv_ioda_dma_weight(struct pci_dev *dev) |
| { |
| /* This is quite simplistic. The "base" weight of a device |
| * is 10. 0 means no DMA is to be accounted for it. |
| */ |
| |
| /* If it's a bridge, no DMA */ |
| if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL) |
| return 0; |
| |
| /* Reduce the weight of slow USB controllers */ |
| if (dev->class == PCI_CLASS_SERIAL_USB_UHCI || |
| dev->class == PCI_CLASS_SERIAL_USB_OHCI || |
| dev->class == PCI_CLASS_SERIAL_USB_EHCI) |
| return 3; |
| |
| /* Increase the weight of RAID (includes Obsidian) */ |
| if ((dev->class >> 8) == PCI_CLASS_STORAGE_RAID) |
| return 15; |
| |
| /* Default */ |
| return 10; |
| } |
| |
| #if 0 |
| static struct pnv_ioda_pe *pnv_ioda_setup_dev_PE(struct pci_dev *dev) |
| { |
| struct pci_controller *hose = pci_bus_to_host(dev->bus); |
| struct pnv_phb *phb = hose->private_data; |
| struct pci_dn *pdn = pci_get_pdn(dev); |
| struct pnv_ioda_pe *pe; |
| int pe_num; |
| |
| if (!pdn) { |
| pr_err("%s: Device tree node not associated properly\n", |
| pci_name(dev)); |
| return NULL; |
| } |
| if (pdn->pe_number != IODA_INVALID_PE) |
| return NULL; |
| |
| /* PE#0 has been pre-set */ |
| if (dev->bus->number == 0) |
| pe_num = 0; |
| else |
| pe_num = pnv_ioda_alloc_pe(phb); |
| if (pe_num == IODA_INVALID_PE) { |
| pr_warning("%s: Not enough PE# available, disabling device\n", |
| pci_name(dev)); |
| return NULL; |
| } |
| |
| /* NOTE: We get only one ref to the pci_dev for the pdn, not for the |
| * pointer in the PE data structure, both should be destroyed at the |
| * same time. However, this needs to be looked at more closely again |
| * once we actually start removing things (Hotplug, SR-IOV, ...) |
| * |
| * At some point we want to remove the PDN completely anyways |
| */ |
| pe = &phb->ioda.pe_array[pe_num]; |
| pci_dev_get(dev); |
| pdn->pcidev = dev; |
| pdn->pe_number = pe_num; |
| pe->pdev = dev; |
| pe->pbus = NULL; |
| pe->tce32_seg = -1; |
| pe->mve_number = -1; |
| pe->rid = dev->bus->number << 8 | pdn->devfn; |
| |
| pe_info(pe, "Associated device to PE\n"); |
| |
| if (pnv_ioda_configure_pe(phb, pe)) { |
| /* XXX What do we do here ? */ |
| if (pe_num) |
| pnv_ioda_free_pe(phb, pe_num); |
| pdn->pe_number = IODA_INVALID_PE; |
| pe->pdev = NULL; |
| pci_dev_put(dev); |
| return NULL; |
| } |
| |
| /* Assign a DMA weight to the device */ |
| pe->dma_weight = pnv_ioda_dma_weight(dev); |
| if (pe->dma_weight != 0) { |
| phb->ioda.dma_weight += pe->dma_weight; |
| phb->ioda.dma_pe_count++; |
| } |
| |
| /* Link the PE */ |
| pnv_ioda_link_pe_by_weight(phb, pe); |
| |
| return pe; |
| } |
| #endif /* Useful for SRIOV case */ |
| |
| static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe) |
| { |
| struct pci_dev *dev; |
| |
| list_for_each_entry(dev, &bus->devices, bus_list) { |
| struct pci_dn *pdn = pci_get_pdn(dev); |
| |
| if (pdn == NULL) { |
| pr_warn("%s: No device node associated with device !\n", |
| pci_name(dev)); |
| continue; |
| } |
| pdn->pcidev = dev; |
| pdn->pe_number = pe->pe_number; |
| pe->dma_weight += pnv_ioda_dma_weight(dev); |
| if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate) |
| pnv_ioda_setup_same_PE(dev->subordinate, pe); |
| } |
| } |
| |
| /* |
| * There're 2 types of PCI bus sensitive PEs: One that is compromised of |
| * single PCI bus. Another one that contains the primary PCI bus and its |
| * subordinate PCI devices and buses. The second type of PE is normally |
| * orgiriated by PCIe-to-PCI bridge or PLX switch downstream ports. |
| */ |
| static void pnv_ioda_setup_bus_PE(struct pci_bus *bus, int all) |
| { |
| struct pci_controller *hose = pci_bus_to_host(bus); |
| struct pnv_phb *phb = hose->private_data; |
| struct pnv_ioda_pe *pe; |
| int pe_num = IODA_INVALID_PE; |
| |
| /* Check if PE is determined by M64 */ |
| if (phb->pick_m64_pe) |
| pe_num = phb->pick_m64_pe(phb, bus, all); |
| |
| /* The PE number isn't pinned by M64 */ |
| if (pe_num == IODA_INVALID_PE) |
| pe_num = pnv_ioda_alloc_pe(phb); |
| |
| if (pe_num == IODA_INVALID_PE) { |
| pr_warning("%s: Not enough PE# available for PCI bus %04x:%02x\n", |
| __func__, pci_domain_nr(bus), bus->number); |
| return; |
| } |
| |
| pe = &phb->ioda.pe_array[pe_num]; |
| pe->flags |= (all ? PNV_IODA_PE_BUS_ALL : PNV_IODA_PE_BUS); |
| pe->pbus = bus; |
| pe->pdev = NULL; |
| pe->tce32_seg = -1; |
| pe->mve_number = -1; |
| pe->rid = bus->busn_res.start << 8; |
| pe->dma_weight = 0; |
| |
| if (all) |
| pe_info(pe, "Secondary bus %d..%d associated with PE#%d\n", |
| bus->busn_res.start, bus->busn_res.end, pe_num); |
| else |
| pe_info(pe, "Secondary bus %d associated with PE#%d\n", |
| bus->busn_res.start, pe_num); |
| |
| if (pnv_ioda_configure_pe(phb, pe)) { |
| /* XXX What do we do here ? */ |
| if (pe_num) |
| pnv_ioda_free_pe(phb, pe_num); |
| pe->pbus = NULL; |
| return; |
| } |
| |
| /* Associate it with all child devices */ |
| pnv_ioda_setup_same_PE(bus, pe); |
| |
| /* Put PE to the list */ |
| list_add_tail(&pe->list, &phb->ioda.pe_list); |
| |
| /* Account for one DMA PE if at least one DMA capable device exist |
| * below the bridge |
| */ |
| if (pe->dma_weight != 0) { |
| phb->ioda.dma_weight += pe->dma_weight; |
| phb->ioda.dma_pe_count++; |
| } |
| |
| /* Link the PE */ |
| pnv_ioda_link_pe_by_weight(phb, pe); |
| } |
| |
| static void pnv_ioda_setup_PEs(struct pci_bus *bus) |
| { |
| struct pci_dev *dev; |
| |
| pnv_ioda_setup_bus_PE(bus, 0); |
| |
| list_for_each_entry(dev, &bus->devices, bus_list) { |
| if (dev->subordinate) { |
| if (pci_pcie_type(dev) == PCI_EXP_TYPE_PCI_BRIDGE) |
| pnv_ioda_setup_bus_PE(dev->subordinate, 1); |
| else |
| pnv_ioda_setup_PEs(dev->subordinate); |
| } |
| } |
| } |
| |
| /* |
| * Configure PEs so that the downstream PCI buses and devices |
| * could have their associated PE#. Unfortunately, we didn't |
| * figure out the way to identify the PLX bridge yet. So we |
| * simply put the PCI bus and the subordinate behind the root |
| * port to PE# here. The game rule here is expected to be changed |
| * as soon as we can detected PLX bridge correctly. |
| */ |
| static void pnv_pci_ioda_setup_PEs(void) |
| { |
| struct pci_controller *hose, *tmp; |
| struct pnv_phb *phb; |
| |
| list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { |
| phb = hose->private_data; |
| |
| /* M64 layout might affect PE allocation */ |
| if (phb->reserve_m64_pe) |
| phb->reserve_m64_pe(phb); |
| |
| pnv_ioda_setup_PEs(hose->bus); |
| } |
| } |
| |
| static void pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, struct pci_dev *pdev) |
| { |
| struct pci_dn *pdn = pci_get_pdn(pdev); |
| struct pnv_ioda_pe *pe; |
| |
| /* |
| * The function can be called while the PE# |
| * hasn't been assigned. Do nothing for the |
| * case. |
| */ |
| if (!pdn || pdn->pe_number == IODA_INVALID_PE) |
| return; |
| |
| pe = &phb->ioda.pe_array[pdn->pe_number]; |
| WARN_ON(get_dma_ops(&pdev->dev) != &dma_iommu_ops); |
| set_iommu_table_base_and_group(&pdev->dev, &pe->tce32_table); |
| } |
| |
| static int pnv_pci_ioda_dma_set_mask(struct pnv_phb *phb, |
| struct pci_dev *pdev, u64 dma_mask) |
| { |
| struct pci_dn *pdn = pci_get_pdn(pdev); |
| struct pnv_ioda_pe *pe; |
| uint64_t top; |
| bool bypass = false; |
| |
| if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) |
| return -ENODEV;; |
| |
| pe = &phb->ioda.pe_array[pdn->pe_number]; |
| if (pe->tce_bypass_enabled) { |
| top = pe->tce_bypass_base + memblock_end_of_DRAM() - 1; |
| bypass = (dma_mask >= top); |
| } |
| |
| if (bypass) { |
| dev_info(&pdev->dev, "Using 64-bit DMA iommu bypass\n"); |
| set_dma_ops(&pdev->dev, &dma_direct_ops); |
| set_dma_offset(&pdev->dev, pe->tce_bypass_base); |
| } else { |
| dev_info(&pdev->dev, "Using 32-bit DMA via iommu\n"); |
| set_dma_ops(&pdev->dev, &dma_iommu_ops); |
| set_iommu_table_base(&pdev->dev, &pe->tce32_table); |
| } |
| *pdev->dev.dma_mask = dma_mask; |
| return 0; |
| } |
| |
| static u64 pnv_pci_ioda_dma_get_required_mask(struct pnv_phb *phb, |
| struct pci_dev *pdev) |
| { |
| struct pci_dn *pdn = pci_get_pdn(pdev); |
| struct pnv_ioda_pe *pe; |
| u64 end, mask; |
| |
| if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) |
| return 0; |
| |
| pe = &phb->ioda.pe_array[pdn->pe_number]; |
| if (!pe->tce_bypass_enabled) |
| return __dma_get_required_mask(&pdev->dev); |
| |
| |
| end = pe->tce_bypass_base + memblock_end_of_DRAM(); |
| mask = 1ULL << (fls64(end) - 1); |
| mask += mask - 1; |
| |
| return mask; |
| } |
| |
| static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, |
| struct pci_bus *bus, |
| bool add_to_iommu_group) |
| { |
| struct pci_dev *dev; |
| |
| list_for_each_entry(dev, &bus->devices, bus_list) { |
| if (add_to_iommu_group) |
| set_iommu_table_base_and_group(&dev->dev, |
| &pe->tce32_table); |
| else |
| set_iommu_table_base(&dev->dev, &pe->tce32_table); |
| |
| if (dev->subordinate) |
| pnv_ioda_setup_bus_dma(pe, dev->subordinate, |
| add_to_iommu_group); |
| } |
| } |
| |
| static void pnv_pci_ioda1_tce_invalidate(struct pnv_ioda_pe *pe, |
| struct iommu_table *tbl, |
| __be64 *startp, __be64 *endp, bool rm) |
| { |
| __be64 __iomem *invalidate = rm ? |
| (__be64 __iomem *)pe->tce_inval_reg_phys : |
| (__be64 __iomem *)tbl->it_index; |
| unsigned long start, end, inc; |
| const unsigned shift = tbl->it_page_shift; |
| |
| start = __pa(startp); |
| end = __pa(endp); |
| |
| /* BML uses this case for p6/p7/galaxy2: Shift addr and put in node */ |
| if (tbl->it_busno) { |
| start <<= shift; |
| end <<= shift; |
| inc = 128ull << shift; |
| start |= tbl->it_busno; |
| end |= tbl->it_busno; |
| } else if (tbl->it_type & TCE_PCI_SWINV_PAIR) { |
| /* p7ioc-style invalidation, 2 TCEs per write */ |
| start |= (1ull << 63); |
| end |= (1ull << 63); |
| inc = 16; |
| } else { |
| /* Default (older HW) */ |
| inc = 128; |
| } |
| |
| end |= inc - 1; /* round up end to be different than start */ |
| |
| mb(); /* Ensure above stores are visible */ |
| while (start <= end) { |
| if (rm) |
| __raw_rm_writeq(cpu_to_be64(start), invalidate); |
| else |
| __raw_writeq(cpu_to_be64(start), invalidate); |
| start += inc; |
| } |
| |
| /* |
| * The iommu layer will do another mb() for us on build() |
| * and we don't care on free() |
| */ |
| } |
| |
| static void pnv_pci_ioda2_tce_invalidate(struct pnv_ioda_pe *pe, |
| struct iommu_table *tbl, |
| __be64 *startp, __be64 *endp, bool rm) |
| { |
| unsigned long start, end, inc; |
| __be64 __iomem *invalidate = rm ? |
| (__be64 __iomem *)pe->tce_inval_reg_phys : |
| (__be64 __iomem *)tbl->it_index; |
| const unsigned shift = tbl->it_page_shift; |
| |
| /* We'll invalidate DMA address in PE scope */ |
| start = 0x2ull << 60; |
| start |= (pe->pe_number & 0xFF); |
| end = start; |
| |
| /* Figure out the start, end and step */ |
| inc = tbl->it_offset + (((u64)startp - tbl->it_base) / sizeof(u64)); |
| start |= (inc << shift); |
| inc = tbl->it_offset + (((u64)endp - tbl->it_base) / sizeof(u64)); |
| end |= (inc << shift); |
| inc = (0x1ull << shift); |
| mb(); |
| |
| while (start <= end) { |
| if (rm) |
| __raw_rm_writeq(cpu_to_be64(start), invalidate); |
| else |
| __raw_writeq(cpu_to_be64(start), invalidate); |
| start += inc; |
| } |
| } |
| |
| void pnv_pci_ioda_tce_invalidate(struct iommu_table *tbl, |
| __be64 *startp, __be64 *endp, bool rm) |
| { |
| struct pnv_ioda_pe *pe = container_of(tbl, struct pnv_ioda_pe, |
| tce32_table); |
| struct pnv_phb *phb = pe->phb; |
| |
| if (phb->type == PNV_PHB_IODA1) |
| pnv_pci_ioda1_tce_invalidate(pe, tbl, startp, endp, rm); |
| else |
| pnv_pci_ioda2_tce_invalidate(pe, tbl, startp, endp, rm); |
| } |
| |
| static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb, |
| struct pnv_ioda_pe *pe, unsigned int base, |
| unsigned int segs) |
| { |
| |
| struct page *tce_mem = NULL; |
| const __be64 *swinvp; |
| struct iommu_table *tbl; |
| unsigned int i; |
| int64_t rc; |
| void *addr; |
| |
| /* 256M DMA window, 4K TCE pages, 8 bytes TCE */ |
| #define TCE32_TABLE_SIZE ((0x10000000 / 0x1000) * 8) |
| |
| /* XXX FIXME: Handle 64-bit only DMA devices */ |
| /* XXX FIXME: Provide 64-bit DMA facilities & non-4K TCE tables etc.. */ |
| /* XXX FIXME: Allocate multi-level tables on PHB3 */ |
| |
| /* We shouldn't already have a 32-bit DMA associated */ |
| if (WARN_ON(pe->tce32_seg >= 0)) |
| return; |
| |
| /* Grab a 32-bit TCE table */ |
| pe->tce32_seg = base; |
| pe_info(pe, " Setting up 32-bit TCE table at %08x..%08x\n", |
| (base << 28), ((base + segs) << 28) - 1); |
| |
| /* XXX Currently, we allocate one big contiguous table for the |
| * TCEs. We only really need one chunk per 256M of TCE space |
| * (ie per segment) but that's an optimization for later, it |
| * requires some added smarts with our get/put_tce implementation |
| */ |
| tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL, |
| get_order(TCE32_TABLE_SIZE * segs)); |
| if (!tce_mem) { |
| pe_err(pe, " Failed to allocate a 32-bit TCE memory\n"); |
| goto fail; |
| } |
| addr = page_address(tce_mem); |
| memset(addr, 0, TCE32_TABLE_SIZE * segs); |
| |
| /* Configure HW */ |
| for (i = 0; i < segs; i++) { |
| rc = opal_pci_map_pe_dma_window(phb->opal_id, |
| pe->pe_number, |
| base + i, 1, |
| __pa(addr) + TCE32_TABLE_SIZE * i, |
| TCE32_TABLE_SIZE, 0x1000); |
| if (rc) { |
| pe_err(pe, " Failed to configure 32-bit TCE table," |
| " err %ld\n", rc); |
| goto fail; |
| } |
| } |
| |
| /* Setup linux iommu table */ |
| tbl = &pe->tce32_table; |
| pnv_pci_setup_iommu_table(tbl, addr, TCE32_TABLE_SIZE * segs, |
| base << 28, IOMMU_PAGE_SHIFT_4K); |
| |
| /* OPAL variant of P7IOC SW invalidated TCEs */ |
| swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL); |
| if (swinvp) { |
| /* We need a couple more fields -- an address and a data |
| * to or. Since the bus is only printed out on table free |
| * errors, and on the first pass the data will be a relative |
| * bus number, print that out instead. |
| */ |
| pe->tce_inval_reg_phys = be64_to_cpup(swinvp); |
| tbl->it_index = (unsigned long)ioremap(pe->tce_inval_reg_phys, |
| 8); |
| tbl->it_type |= (TCE_PCI_SWINV_CREATE | |
| TCE_PCI_SWINV_FREE | |
| TCE_PCI_SWINV_PAIR); |
| } |
| iommu_init_table(tbl, phb->hose->node); |
| iommu_register_group(tbl, phb->hose->global_number, pe->pe_number); |
| |
| if (pe->pdev) |
| set_iommu_table_base_and_group(&pe->pdev->dev, tbl); |
| else |
| pnv_ioda_setup_bus_dma(pe, pe->pbus, true); |
| |
| return; |
| fail: |
| /* XXX Failure: Try to fallback to 64-bit only ? */ |
| if (pe->tce32_seg >= 0) |
| pe->tce32_seg = -1; |
| if (tce_mem) |
| __free_pages(tce_mem, get_order(TCE32_TABLE_SIZE * segs)); |
| } |
| |
| static void pnv_pci_ioda2_set_bypass(struct iommu_table *tbl, bool enable) |
| { |
| struct pnv_ioda_pe *pe = container_of(tbl, struct pnv_ioda_pe, |
| tce32_table); |
| uint16_t window_id = (pe->pe_number << 1 ) + 1; |
| int64_t rc; |
| |
| pe_info(pe, "%sabling 64-bit DMA bypass\n", enable ? "En" : "Dis"); |
| if (enable) { |
| phys_addr_t top = memblock_end_of_DRAM(); |
| |
| top = roundup_pow_of_two(top); |
| rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, |
| pe->pe_number, |
| window_id, |
| pe->tce_bypass_base, |
| top); |
| } else { |
| rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, |
| pe->pe_number, |
| window_id, |
| pe->tce_bypass_base, |
| 0); |
| |
| /* |
| * EEH needs the mapping between IOMMU table and group |
| * of those VFIO/KVM pass-through devices. We can postpone |
| * resetting DMA ops until the DMA mask is configured in |
| * host side. |
| */ |
| if (pe->pdev) |
| set_iommu_table_base(&pe->pdev->dev, tbl); |
| else |
| pnv_ioda_setup_bus_dma(pe, pe->pbus, false); |
| } |
| if (rc) |
| pe_err(pe, "OPAL error %lld configuring bypass window\n", rc); |
| else |
| pe->tce_bypass_enabled = enable; |
| } |
| |
| static void pnv_pci_ioda2_setup_bypass_pe(struct pnv_phb *phb, |
| struct pnv_ioda_pe *pe) |
| { |
| /* TVE #1 is selected by PCI address bit 59 */ |
| pe->tce_bypass_base = 1ull << 59; |
| |
| /* Install set_bypass callback for VFIO */ |
| pe->tce32_table.set_bypass = pnv_pci_ioda2_set_bypass; |
| |
| /* Enable bypass by default */ |
| pnv_pci_ioda2_set_bypass(&pe->tce32_table, true); |
| } |
| |
| static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, |
| struct pnv_ioda_pe *pe) |
| { |
| struct page *tce_mem = NULL; |
| void *addr; |
| const __be64 *swinvp; |
| struct iommu_table *tbl; |
| unsigned int tce_table_size, end; |
| int64_t rc; |
| |
| /* We shouldn't already have a 32-bit DMA associated */ |
| if (WARN_ON(pe->tce32_seg >= 0)) |
| return; |
| |
| /* The PE will reserve all possible 32-bits space */ |
| pe->tce32_seg = 0; |
| end = (1 << ilog2(phb->ioda.m32_pci_base)); |
| tce_table_size = (end / 0x1000) * 8; |
| pe_info(pe, "Setting up 32-bit TCE table at 0..%08x\n", |
| end); |
| |
| /* Allocate TCE table */ |
| tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL, |
| get_order(tce_table_size)); |
| if (!tce_mem) { |
| pe_err(pe, "Failed to allocate a 32-bit TCE memory\n"); |
| goto fail; |
| } |
| addr = page_address(tce_mem); |
| memset(addr, 0, tce_table_size); |
| |
| /* |
| * Map TCE table through TVT. The TVE index is the PE number |
| * shifted by 1 bit for 32-bits DMA space. |
| */ |
| rc = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number, |
| pe->pe_number << 1, 1, __pa(addr), |
| tce_table_size, 0x1000); |
| if (rc) { |
| pe_err(pe, "Failed to configure 32-bit TCE table," |
| " err %ld\n", rc); |
| goto fail; |
| } |
| |
| /* Setup linux iommu table */ |
| tbl = &pe->tce32_table; |
| pnv_pci_setup_iommu_table(tbl, addr, tce_table_size, 0, |
| IOMMU_PAGE_SHIFT_4K); |
| |
| /* OPAL variant of PHB3 invalidated TCEs */ |
| swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL); |
| if (swinvp) { |
| /* We need a couple more fields -- an address and a data |
| * to or. Since the bus is only printed out on table free |
| * errors, and on the first pass the data will be a relative |
| * bus number, print that out instead. |
| */ |
| pe->tce_inval_reg_phys = be64_to_cpup(swinvp); |
| tbl->it_index = (unsigned long)ioremap(pe->tce_inval_reg_phys, |
| 8); |
| tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE); |
| } |
| iommu_init_table(tbl, phb->hose->node); |
| iommu_register_group(tbl, phb->hose->global_number, pe->pe_number); |
| |
| if (pe->pdev) |
| set_iommu_table_base_and_group(&pe->pdev->dev, tbl); |
| else |
| pnv_ioda_setup_bus_dma(pe, pe->pbus, true); |
| |
| /* Also create a bypass window */ |
| if (!pnv_iommu_bypass_disabled) |
| pnv_pci_ioda2_setup_bypass_pe(phb, pe); |
| |
| return; |
| fail: |
| if (pe->tce32_seg >= 0) |
| pe->tce32_seg = -1; |
| if (tce_mem) |
| __free_pages(tce_mem, get_order(tce_table_size)); |
| } |
| |
| static void pnv_ioda_setup_dma(struct pnv_phb *phb) |
| { |
| struct pci_controller *hose = phb->hose; |
| unsigned int residual, remaining, segs, tw, base; |
| struct pnv_ioda_pe *pe; |
| |
| /* If we have more PE# than segments available, hand out one |
| * per PE until we run out and let the rest fail. If not, |
| * then we assign at least one segment per PE, plus more based |
| * on the amount of devices under that PE |
| */ |
| if (phb->ioda.dma_pe_count > phb->ioda.tce32_count) |
| residual = 0; |
| else |
| residual = phb->ioda.tce32_count - |
| phb->ioda.dma_pe_count; |
| |
| pr_info("PCI: Domain %04x has %ld available 32-bit DMA segments\n", |
| hose->global_number, phb->ioda.tce32_count); |
| pr_info("PCI: %d PE# for a total weight of %d\n", |
| phb->ioda.dma_pe_count, phb->ioda.dma_weight); |
| |
| /* Walk our PE list and configure their DMA segments, hand them |
| * out one base segment plus any residual segments based on |
| * weight |
| */ |
| remaining = phb->ioda.tce32_count; |
| tw = phb->ioda.dma_weight; |
| base = 0; |
| list_for_each_entry(pe, &phb->ioda.pe_dma_list, dma_link) { |
| if (!pe->dma_weight) |
| continue; |
| if (!remaining) { |
| pe_warn(pe, "No DMA32 resources available\n"); |
| continue; |
| } |
| segs = 1; |
| if (residual) { |
| segs += ((pe->dma_weight * residual) + (tw / 2)) / tw; |
| if (segs > remaining) |
| segs = remaining; |
| } |
| |
| /* |
| * For IODA2 compliant PHB3, we needn't care about the weight. |
| * The all available 32-bits DMA space will be assigned to |
| * the specific PE. |
| */ |
| if (phb->type == PNV_PHB_IODA1) { |
| pe_info(pe, "DMA weight %d, assigned %d DMA32 segments\n", |
| pe->dma_weight, segs); |
| pnv_pci_ioda_setup_dma_pe(phb, pe, base, segs); |
| } else { |
| pe_info(pe, "Assign DMA32 space\n"); |
| segs = 0; |
| pnv_pci_ioda2_setup_dma_pe(phb, pe); |
| } |
| |
| remaining -= segs; |
| base += segs; |
| } |
| } |
| |
| #ifdef CONFIG_PCI_MSI |
| static void pnv_ioda2_msi_eoi(struct irq_data *d) |
| { |
| unsigned int hw_irq = (unsigned int)irqd_to_hwirq(d); |
| struct irq_chip *chip = irq_data_get_irq_chip(d); |
| struct pnv_phb *phb = container_of(chip, struct pnv_phb, |
| ioda.irq_chip); |
| int64_t rc; |
| |
| rc = opal_pci_msi_eoi(phb->opal_id, hw_irq); |
| WARN_ON_ONCE(rc); |
| |
| icp_native_eoi(d); |
| } |
| |
| |
| static void set_msi_irq_chip(struct pnv_phb *phb, unsigned int virq) |
| { |
| struct irq_data *idata; |
| struct irq_chip *ichip; |
| |
| if (phb->type != PNV_PHB_IODA2) |
| return; |
| |
| if (!phb->ioda.irq_chip_init) { |
| /* |
| * First time we setup an MSI IRQ, we need to setup the |
| * corresponding IRQ chip to route correctly. |
| */ |
| idata = irq_get_irq_data(virq); |
| ichip = irq_data_get_irq_chip(idata); |
| phb->ioda.irq_chip_init = 1; |
| phb->ioda.irq_chip = *ichip; |
| phb->ioda.irq_chip.irq_eoi = pnv_ioda2_msi_eoi; |
| } |
| irq_set_chip(virq, &phb->ioda.irq_chip); |
| } |
| |
| #ifdef CONFIG_CXL_BASE |
| |
| struct device_node *pnv_pci_get_phb_node(struct pci_dev *dev) |
| { |
| struct pci_controller *hose = pci_bus_to_host(dev->bus); |
| |
| return of_node_get(hose->dn); |
| } |
| EXPORT_SYMBOL(pnv_pci_get_phb_node); |
| |
| int pnv_phb_to_cxl_mode(struct pci_dev *dev, uint64_t mode) |
| { |
| struct pci_controller *hose = pci_bus_to_host(dev->bus); |
| struct pnv_phb *phb = hose->private_data; |
| struct pnv_ioda_pe *pe; |
| int rc; |
| |
| pe = pnv_ioda_get_pe(dev); |
| if (!pe) |
| return -ENODEV; |
| |
| pe_info(pe, "Switching PHB to CXL\n"); |
| |
| rc = opal_pci_set_phb_cxl_mode(phb->opal_id, mode, pe->pe_number); |
| if (rc) |
| dev_err(&dev->dev, "opal_pci_set_phb_cxl_mode failed: %i\n", rc); |
| |
| return rc; |
| } |
| EXPORT_SYMBOL(pnv_phb_to_cxl_mode); |
| |
| /* Find PHB for cxl dev and allocate MSI hwirqs? |
| * Returns the absolute hardware IRQ number |
| */ |
| int pnv_cxl_alloc_hwirqs(struct pci_dev *dev, int num) |
| { |
| struct pci_controller *hose = pci_bus_to_host(dev->bus); |
| struct pnv_phb *phb = hose->private_data; |
| int hwirq = msi_bitmap_alloc_hwirqs(&phb->msi_bmp, num); |
| |
| if (hwirq < 0) { |
| dev_warn(&dev->dev, "Failed to find a free MSI\n"); |
| return -ENOSPC; |
| } |
| |
| return phb->msi_base + hwirq; |
| } |
| EXPORT_SYMBOL(pnv_cxl_alloc_hwirqs); |
| |
| void pnv_cxl_release_hwirqs(struct pci_dev *dev, int hwirq, int num) |
| { |
| struct pci_controller *hose = pci_bus_to_host(dev->bus); |
| struct pnv_phb *phb = hose->private_data; |
| |
| msi_bitmap_free_hwirqs(&phb->msi_bmp, hwirq - phb->msi_base, num); |
| } |
| EXPORT_SYMBOL(pnv_cxl_release_hwirqs); |
| |
| void pnv_cxl_release_hwirq_ranges(struct cxl_irq_ranges *irqs, |
| struct pci_dev *dev) |
| { |
| struct pci_controller *hose = pci_bus_to_host(dev->bus); |
| struct pnv_phb *phb = hose->private_data; |
| int i, hwirq; |
| |
| for (i = 1; i < CXL_IRQ_RANGES; i++) { |
| if (!irqs->range[i]) |
| continue; |
| pr_devel("cxl release irq range 0x%x: offset: 0x%lx limit: %ld\n", |
| i, irqs->offset[i], |
| irqs->range[i]); |
| hwirq = irqs->offset[i] - phb->msi_base; |
| msi_bitmap_free_hwirqs(&phb->msi_bmp, hwirq, |
| irqs->range[i]); |
| } |
| } |
| EXPORT_SYMBOL(pnv_cxl_release_hwirq_ranges); |
| |
| int pnv_cxl_alloc_hwirq_ranges(struct cxl_irq_ranges *irqs, |
| struct pci_dev *dev, int num) |
| { |
| struct pci_controller *hose = pci_bus_to_host(dev->bus); |
| struct pnv_phb *phb = hose->private_data; |
| int i, hwirq, try; |
| |
| memset(irqs, 0, sizeof(struct cxl_irq_ranges)); |
| |
| /* 0 is reserved for the multiplexed PSL DSI interrupt */ |
| for (i = 1; i < CXL_IRQ_RANGES && num; i++) { |
| try = num; |
| while (try) { |
| hwirq = msi_bitmap_alloc_hwirqs(&phb->msi_bmp, try); |
| if (hwirq >= 0) |
| break; |
| try /= 2; |
| } |
| if (!try) |
| goto fail; |
| |
| irqs->offset[i] = phb->msi_base + hwirq; |
| irqs->range[i] = try; |
| pr_devel("cxl alloc irq range 0x%x: offset: 0x%lx limit: %li\n", |
| i, irqs->offset[i], irqs->range[i]); |
| num -= try; |
| } |
| if (num) |
| goto fail; |
| |
| return 0; |
| fail: |
| pnv_cxl_release_hwirq_ranges(irqs, dev); |
| return -ENOSPC; |
| } |
| EXPORT_SYMBOL(pnv_cxl_alloc_hwirq_ranges); |
| |
| int pnv_cxl_get_irq_count(struct pci_dev *dev) |
| { |
| struct pci_controller *hose = pci_bus_to_host(dev->bus); |
| struct pnv_phb *phb = hose->private_data; |
| |
| return phb->msi_bmp.irq_count; |
| } |
| EXPORT_SYMBOL(pnv_cxl_get_irq_count); |
| |
| int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq, |
| unsigned int virq) |
| { |
| struct pci_controller *hose = pci_bus_to_host(dev->bus); |
| struct pnv_phb *phb = hose->private_data; |
| unsigned int xive_num = hwirq - phb->msi_base; |
| struct pnv_ioda_pe *pe; |
| int rc; |
| |
| if (!(pe = pnv_ioda_get_pe(dev))) |
| return -ENODEV; |
| |
| /* Assign XIVE to PE */ |
| rc = opal_pci_set_xive_pe(phb->opal_id, pe->pe_number, xive_num); |
| if (rc) { |
| pe_warn(pe, "%s: OPAL error %d setting msi_base 0x%x " |
| "hwirq 0x%x XIVE 0x%x PE\n", |
| pci_name(dev), rc, phb->msi_base, hwirq, xive_num); |
| return -EIO; |
| } |
| set_msi_irq_chip(phb, virq); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL(pnv_cxl_ioda_msi_setup); |
| #endif |
| |
| static int pnv_pci_ioda_msi_setup(struct pnv_phb *phb, struct pci_dev *dev, |
| unsigned int hwirq, unsigned int virq, |
| unsigned int is_64, struct msi_msg *msg) |
| { |
| struct pnv_ioda_pe *pe = pnv_ioda_get_pe(dev); |
| unsigned int xive_num = hwirq - phb->msi_base; |
| __be32 data; |
| int rc; |
| |
| /* No PE assigned ? bail out ... no MSI for you ! */ |
| if (pe == NULL) |
| return -ENXIO; |
| |
| /* Check if we have an MVE */ |
| if (pe->mve_number < 0) |
| return -ENXIO; |
| |
| /* Force 32-bit MSI on some broken devices */ |
| if (dev->no_64bit_msi) |
| is_64 = 0; |
| |
| /* Assign XIVE to PE */ |
| rc = opal_pci_set_xive_pe(phb->opal_id, pe->pe_number, xive_num); |
| if (rc) { |
| pr_warn("%s: OPAL error %d setting XIVE %d PE\n", |
| pci_name(dev), rc, xive_num); |
| return -EIO; |
| } |
| |
| if (is_64) { |
| __be64 addr64; |
| |
| rc = opal_get_msi_64(phb->opal_id, pe->mve_number, xive_num, 1, |
| &addr64, &data); |
| if (rc) { |
| pr_warn("%s: OPAL error %d getting 64-bit MSI data\n", |
| pci_name(dev), rc); |
| return -EIO; |
| } |
| msg->address_hi = be64_to_cpu(addr64) >> 32; |
| msg->address_lo = be64_to_cpu(addr64) & 0xfffffffful; |
| } else { |
| __be32 addr32; |
| |
| rc = opal_get_msi_32(phb->opal_id, pe->mve_number, xive_num, 1, |
| &addr32, &data); |
| if (rc) { |
| pr_warn("%s: OPAL error %d getting 32-bit MSI data\n", |
| pci_name(dev), rc); |
| return -EIO; |
| } |
| msg->address_hi = 0; |
| msg->address_lo = be32_to_cpu(addr32); |
| } |
| msg->data = be32_to_cpu(data); |
| |
| set_msi_irq_chip(phb, virq); |
| |
| pr_devel("%s: %s-bit MSI on hwirq %x (xive #%d)," |
| " address=%x_%08x data=%x PE# %d\n", |
| pci_name(dev), is_64 ? "64" : "32", hwirq, xive_num, |
| msg->address_hi, msg->address_lo, data, pe->pe_number); |
| |
| return 0; |
| } |
| |
| static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) |
| { |
| unsigned int count; |
| const __be32 *prop = of_get_property(phb->hose->dn, |
| "ibm,opal-msi-ranges", NULL); |
| if (!prop) { |
| /* BML Fallback */ |
| prop = of_get_property(phb->hose->dn, "msi-ranges", NULL); |
| } |
| if (!prop) |
| return; |
| |
| phb->msi_base = be32_to_cpup(prop); |
| count = be32_to_cpup(prop + 1); |
| if (msi_bitmap_alloc(&phb->msi_bmp, count, phb->hose->dn)) { |
| pr_err("PCI %d: Failed to allocate MSI bitmap !\n", |
| phb->hose->global_number); |
| return; |
| } |
| |
| phb->msi_setup = pnv_pci_ioda_msi_setup; |
| phb->msi32_support = 1; |
| pr_info(" Allocated bitmap for %d MSIs (base IRQ 0x%x)\n", |
| count, phb->msi_base); |
| } |
| #else |
| static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) { } |
| #endif /* CONFIG_PCI_MSI */ |
| |
| /* |
| * This function is supposed to be called on basis of PE from top |
| * to bottom style. So the the I/O or MMIO segment assigned to |
| * parent PE could be overrided by its child PEs if necessary. |
| */ |
| static void pnv_ioda_setup_pe_seg(struct pci_controller *hose, |
| struct pnv_ioda_pe *pe) |
| { |
| struct pnv_phb *phb = hose->private_data; |
| struct pci_bus_region region; |
| struct resource *res; |
| int i, index; |
| int rc; |
| |
| /* |
| * NOTE: We only care PCI bus based PE for now. For PCI |
| * device based PE, for example SRIOV sensitive VF should |
| * be figured out later. |
| */ |
| BUG_ON(!(pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL))); |
| |
| pci_bus_for_each_resource(pe->pbus, res, i) { |
| if (!res || !res->flags || |
| res->start > res->end) |
| continue; |
| |
| if (res->flags & IORESOURCE_IO) { |
| region.start = res->start - phb->ioda.io_pci_base; |
| region.end = res->end - phb->ioda.io_pci_base; |
| index = region.start / phb->ioda.io_segsize; |
| |
| while (index < phb->ioda.total_pe && |
| region.start <= region.end) { |
| phb->ioda.io_segmap[index] = pe->pe_number; |
| rc = opal_pci_map_pe_mmio_window(phb->opal_id, |
| pe->pe_number, OPAL_IO_WINDOW_TYPE, 0, index); |
| if (rc != OPAL_SUCCESS) { |
| pr_err("%s: OPAL error %d when mapping IO " |
| "segment #%d to PE#%d\n", |
| __func__, rc, index, pe->pe_number); |
| break; |
| } |
| |
| region.start += phb->ioda.io_segsize; |
| index++; |
| } |
| } else if ((res->flags & IORESOURCE_MEM) && |
| !pnv_pci_is_mem_pref_64(res->flags)) { |
| region.start = res->start - |
| hose->mem_offset[0] - |
| phb->ioda.m32_pci_base; |
| region.end = res->end - |
| hose->mem_offset[0] - |
| phb->ioda.m32_pci_base; |
| index = region.start / phb->ioda.m32_segsize; |
| |
| while (index < phb->ioda.total_pe && |
| region.start <= region.end) { |
| phb->ioda.m32_segmap[index] = pe->pe_number; |
| rc = opal_pci_map_pe_mmio_window(phb->opal_id, |
| pe->pe_number, OPAL_M32_WINDOW_TYPE, 0, index); |
| if (rc != OPAL_SUCCESS) { |
| pr_err("%s: OPAL error %d when mapping M32 " |
| "segment#%d to PE#%d", |
| __func__, rc, index, pe->pe_number); |
| break; |
| } |
| |
| region.start += phb->ioda.m32_segsize; |
| index++; |
| } |
| } |
| } |
| } |
| |
| static void pnv_pci_ioda_setup_seg(void) |
| { |
| struct pci_controller *tmp, *hose; |
| struct pnv_phb *phb; |
| struct pnv_ioda_pe *pe; |
| |
| list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { |
| phb = hose->private_data; |
| list_for_each_entry(pe, &phb->ioda.pe_list, list) { |
| pnv_ioda_setup_pe_seg(hose, pe); |
| } |
| } |
| } |
| |
| static void pnv_pci_ioda_setup_DMA(void) |
| { |
| struct pci_controller *hose, *tmp; |
| struct pnv_phb *phb; |
| |
| list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { |
| pnv_ioda_setup_dma(hose->private_data); |
| |
| /* Mark the PHB initialization done */ |
| phb = hose->private_data; |
| phb->initialized = 1; |
| } |
| } |
| |
| static void pnv_pci_ioda_create_dbgfs(void) |
| { |
| #ifdef CONFIG_DEBUG_FS |
| struct pci_controller *hose, *tmp; |
| struct pnv_phb *phb; |
| char name[16]; |
| |
| list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { |
| phb = hose->private_data; |
| |
| sprintf(name, "PCI%04x", hose->global_number); |
| phb->dbgfs = debugfs_create_dir(name, powerpc_debugfs_root); |
| if (!phb->dbgfs) |
| pr_warning("%s: Error on creating debugfs on PHB#%x\n", |
| __func__, hose->global_number); |
| } |
| #endif /* CONFIG_DEBUG_FS */ |
| } |
| |
| static void pnv_pci_ioda_fixup(void) |
| { |
| pnv_pci_ioda_setup_PEs(); |
| pnv_pci_ioda_setup_seg(); |
| pnv_pci_ioda_setup_DMA(); |
| |
| pnv_pci_ioda_create_dbgfs(); |
| |
| #ifdef CONFIG_EEH |
| eeh_init(); |
| eeh_addr_cache_build(); |
| #endif |
| } |
| |
| /* |
| * Returns the alignment for I/O or memory windows for P2P |
| * bridges. That actually depends on how PEs are segmented. |
| * For now, we return I/O or M32 segment size for PE sensitive |
| * P2P bridges. Otherwise, the default values (4KiB for I/O, |
| * 1MiB for memory) will be returned. |
| * |
| * The current PCI bus might be put into one PE, which was |
| * create against the parent PCI bridge. For that case, we |
| * needn't enlarge the alignment so that we can save some |
| * resources. |
| */ |
| static resource_size_t pnv_pci_window_alignment(struct pci_bus *bus, |
| unsigned long type) |
| { |
| struct pci_dev *bridge; |
| struct pci_controller *hose = pci_bus_to_host(bus); |
| struct pnv_phb *phb = hose->private_data; |
| int num_pci_bridges = 0; |
| |
| bridge = bus->self; |
| while (bridge) { |
| if (pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE) { |
| num_pci_bridges++; |
| if (num_pci_bridges >= 2) |
| return 1; |
| } |
| |
| bridge = bridge->bus->self; |
| } |
| |
| /* We fail back to M32 if M64 isn't supported */ |
| if (phb->ioda.m64_segsize && |
| pnv_pci_is_mem_pref_64(type)) |
| return phb->ioda.m64_segsize; |
| if (type & IORESOURCE_MEM) |
| return phb->ioda.m32_segsize; |
| |
| return phb->ioda.io_segsize; |
| } |
| |
| /* Prevent enabling devices for which we couldn't properly |
| * assign a PE |
| */ |
| static int pnv_pci_enable_device_hook(struct pci_dev *dev) |
| { |
| struct pci_controller *hose = pci_bus_to_host(dev->bus); |
| struct pnv_phb *phb = hose->private_data; |
| struct pci_dn *pdn; |
| |
| /* The function is probably called while the PEs have |
| * not be created yet. For example, resource reassignment |
| * during PCI probe period. We just skip the check if |
| * PEs isn't ready. |
| */ |
| if (!phb->initialized) |
| return 0; |
| |
| pdn = pci_get_pdn(dev); |
| if (!pdn || pdn->pe_number == IODA_INVALID_PE) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static u32 pnv_ioda_bdfn_to_pe(struct pnv_phb *phb, struct pci_bus *bus, |
| u32 devfn) |
| { |
| return phb->ioda.pe_rmap[(bus->number << 8) | devfn]; |
| } |
| |
| static void pnv_pci_ioda_shutdown(struct pnv_phb *phb) |
| { |
| opal_pci_reset(phb->opal_id, OPAL_RESET_PCI_IODA_TABLE, |
| OPAL_ASSERT_RESET); |
| } |
| |
| static void __init pnv_pci_init_ioda_phb(struct device_node *np, |
| u64 hub_id, int ioda_type) |
| { |
| struct pci_controller *hose; |
| struct pnv_phb *phb; |
| unsigned long size, m32map_off, pemap_off, iomap_off = 0; |
| const __be64 *prop64; |
| const __be32 *prop32; |
| int len; |
| u64 phb_id; |
| void *aux; |
| long rc; |
| |
| pr_info("Initializing IODA%d OPAL PHB %s\n", ioda_type, np->full_name); |
| |
| prop64 = of_get_property(np, "ibm,opal-phbid", NULL); |
| if (!prop64) { |
| pr_err(" Missing \"ibm,opal-phbid\" property !\n"); |
| return; |
| } |
| phb_id = be64_to_cpup(prop64); |
| pr_debug(" PHB-ID : 0x%016llx\n", phb_id); |
| |
| phb = memblock_virt_alloc(sizeof(struct pnv_phb), 0); |
| |
| /* Allocate PCI controller */ |
| phb->hose = hose = pcibios_alloc_controller(np); |
| if (!phb->hose) { |
| pr_err(" Can't allocate PCI controller for %s\n", |
| np->full_name); |
| memblock_free(__pa(phb), sizeof(struct pnv_phb)); |
| return; |
| } |
| |
| spin_lock_init(&phb->lock); |
| prop32 = of_get_property(np, "bus-range", &len); |
| if (prop32 && len == 8) { |
| hose->first_busno = be32_to_cpu(prop32[0]); |
| hose->last_busno = be32_to_cpu(prop32[1]); |
| } else { |
| pr_warn(" Broken <bus-range> on %s\n", np->full_name); |
| hose->first_busno = 0; |
| hose->last_busno = 0xff; |
| } |
| hose->private_data = phb; |
| phb->hub_id = hub_id; |
| phb->opal_id = phb_id; |
| phb->type = ioda_type; |
| |
| /* Detect specific models for error handling */ |
| if (of_device_is_compatible(np, "ibm,p7ioc-pciex")) |
| phb->model = PNV_PHB_MODEL_P7IOC; |
| else if (of_device_is_compatible(np, "ibm,power8-pciex")) |
| phb->model = PNV_PHB_MODEL_PHB3; |
| else |
| phb->model = PNV_PHB_MODEL_UNKNOWN; |
| |
| /* Parse 32-bit and IO ranges (if any) */ |
| pci_process_bridge_OF_ranges(hose, np, !hose->global_number); |
| |
| /* Get registers */ |
| phb->regs = of_iomap(np, 0); |
| if (phb->regs == NULL) |
| pr_err(" Failed to map registers !\n"); |
| |
| /* Initialize more IODA stuff */ |
| phb->ioda.total_pe = 1; |
| prop32 = of_get_property(np, "ibm,opal-num-pes", NULL); |
| if (prop32) |
| phb->ioda.total_pe = be32_to_cpup(prop32); |
| prop32 = of_get_property(np, "ibm,opal-reserved-pe", NULL); |
| if (prop32) |
| phb->ioda.reserved_pe = be32_to_cpup(prop32); |
| |
| /* Parse 64-bit MMIO range */ |
| pnv_ioda_parse_m64_window(phb); |
| |
| phb->ioda.m32_size = resource_size(&hose->mem_resources[0]); |
| /* FW Has already off top 64k of M32 space (MSI space) */ |
| phb->ioda.m32_size += 0x10000; |
| |
| phb->ioda.m32_segsize = phb->ioda.m32_size / phb->ioda.total_pe; |
| phb->ioda.m32_pci_base = hose->mem_resources[0].start - hose->mem_offset[0]; |
| phb->ioda.io_size = hose->pci_io_size; |
| phb->ioda.io_segsize = phb->ioda.io_size / phb->ioda.total_pe; |
| phb->ioda.io_pci_base = 0; /* XXX calculate this ? */ |
| |
| /* Allocate aux data & arrays. We don't have IO ports on PHB3 */ |
| size = _ALIGN_UP(phb->ioda.total_pe / 8, sizeof(unsigned long)); |
| m32map_off = size; |
| size += phb->ioda.total_pe * sizeof(phb->ioda.m32_segmap[0]); |
| if (phb->type == PNV_PHB_IODA1) { |
| iomap_off = size; |
| size += phb->ioda.total_pe * sizeof(phb->ioda.io_segmap[0]); |
| } |
| pemap_off = size; |
| size += phb->ioda.total_pe * sizeof(struct pnv_ioda_pe); |
| aux = memblock_virt_alloc(size, 0); |
| phb->ioda.pe_alloc = aux; |
| phb->ioda.m32_segmap = aux + m32map_off; |
| if (phb->type == PNV_PHB_IODA1) |
| phb->ioda.io_segmap = aux + iomap_off; |
| phb->ioda.pe_array = aux + pemap_off; |
| set_bit(phb->ioda.reserved_pe, phb->ioda.pe_alloc); |
| |
| INIT_LIST_HEAD(&phb->ioda.pe_dma_list); |
| INIT_LIST_HEAD(&phb->ioda.pe_list); |
| |
| /* Calculate how many 32-bit TCE segments we have */ |
| phb->ioda.tce32_count = phb->ioda.m32_pci_base >> 28; |
| |
| #if 0 /* We should really do that ... */ |
| rc = opal_pci_set_phb_mem_window(opal->phb_id, |
| window_type, |
| window_num, |
| starting_real_address, |
| starting_pci_address, |
| segment_size); |
| #endif |
| |
| pr_info(" %03d (%03d) PE's M32: 0x%x [segment=0x%x]\n", |
| phb->ioda.total_pe, phb->ioda.reserved_pe, |
| phb->ioda.m32_size, phb->ioda.m32_segsize); |
| if (phb->ioda.m64_size) |
| pr_info(" M64: 0x%lx [segment=0x%lx]\n", |
| phb->ioda.m64_size, phb->ioda.m64_segsize); |
| if (phb->ioda.io_size) |
| pr_info(" IO: 0x%x [segment=0x%x]\n", |
| phb->ioda.io_size, phb->ioda.io_segsize); |
| |
| |
| phb->hose->ops = &pnv_pci_ops; |
| phb->get_pe_state = pnv_ioda_get_pe_state; |
| phb->freeze_pe = pnv_ioda_freeze_pe; |
| phb->unfreeze_pe = pnv_ioda_unfreeze_pe; |
| |
| /* Setup RID -> PE mapping function */ |
| phb->bdfn_to_pe = pnv_ioda_bdfn_to_pe; |
| |
| /* Setup TCEs */ |
| phb->dma_dev_setup = pnv_pci_ioda_dma_dev_setup; |
| phb->dma_set_mask = pnv_pci_ioda_dma_set_mask; |
| phb->dma_get_required_mask = pnv_pci_ioda_dma_get_required_mask; |
| |
| /* Setup shutdown function for kexec */ |
| phb->shutdown = pnv_pci_ioda_shutdown; |
| |
| /* Setup MSI support */ |
| pnv_pci_init_ioda_msis(phb); |
| |
| /* |
| * We pass the PCI probe flag PCI_REASSIGN_ALL_RSRC here |
| * to let the PCI core do resource assignment. It's supposed |
| * that the PCI core will do correct I/O and MMIO alignment |
| * for the P2P bridge bars so that each PCI bus (excluding |
| * the child P2P bridges) can form individual PE. |
| */ |
| ppc_md.pcibios_fixup = pnv_pci_ioda_fixup; |
| ppc_md.pcibios_enable_device_hook = pnv_pci_enable_device_hook; |
| ppc_md.pcibios_window_alignment = pnv_pci_window_alignment; |
| ppc_md.pcibios_reset_secondary_bus = pnv_pci_reset_secondary_bus; |
| pci_add_flags(PCI_REASSIGN_ALL_RSRC); |
| |
| /* Reset IODA tables to a clean state */ |
| rc = opal_pci_reset(phb_id, OPAL_RESET_PCI_IODA_TABLE, OPAL_ASSERT_RESET); |
| if (rc) |
| pr_warning(" OPAL Error %ld performing IODA table reset !\n", rc); |
| |
| /* If we're running in kdump kerenl, the previous kerenl never |
| * shutdown PCI devices correctly. We already got IODA table |
| * cleaned out. So we have to issue PHB reset to stop all PCI |
| * transactions from previous kerenl. |
| */ |
| if (is_kdump_kernel()) { |
| pr_info(" Issue PHB reset ...\n"); |
| pnv_eeh_phb_reset(hose, EEH_RESET_FUNDAMENTAL); |
| pnv_eeh_phb_reset(hose, EEH_RESET_DEACTIVATE); |
| } |
| |
| /* Remove M64 resource if we can't configure it successfully */ |
| if (!phb->init_m64 || phb->init_m64(phb)) |
| hose->mem_resources[1].flags = 0; |
| } |
| |
| void __init pnv_pci_init_ioda2_phb(struct device_node *np) |
| { |
| pnv_pci_init_ioda_phb(np, 0, PNV_PHB_IODA2); |
| } |
| |
| void __init pnv_pci_init_ioda_hub(struct device_node *np) |
| { |
| struct device_node *phbn; |
| const __be64 *prop64; |
| u64 hub_id; |
| |
| pr_info("Probing IODA IO-Hub %s\n", np->full_name); |
| |
| prop64 = of_get_property(np, "ibm,opal-hubid", NULL); |
| if (!prop64) { |
| pr_err(" Missing \"ibm,opal-hubid\" property !\n"); |
| return; |
| } |
| hub_id = be64_to_cpup(prop64); |
| pr_devel(" HUB-ID : 0x%016llx\n", hub_id); |
| |
| /* Count child PHBs */ |
| for_each_child_of_node(np, phbn) { |
| /* Look for IODA1 PHBs */ |
| if (of_device_is_compatible(phbn, "ibm,ioda-phb")) |
| pnv_pci_init_ioda_phb(phbn, hub_id, PNV_PHB_IODA1); |
| } |
| } |