| /* |
| * 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/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 <asm/sections.h> |
| #include <asm/io.h> |
| #include <asm/prom.h> |
| #include <asm/pci-bridge.h> |
| #include <asm/machdep.h> |
| #include <asm/ppc-pci.h> |
| #include <asm/opal.h> |
| #include <asm/iommu.h> |
| #include <asm/tce.h> |
| |
| #include "powernv.h" |
| #include "pci.h" |
| |
| #define define_pe_printk_level(func, kern_level) \ |
| static int func(const struct pnv_ioda_pe *pe, const char *fmt, ...) \ |
| { \ |
| struct va_format vaf; \ |
| va_list args; \ |
| char pfix[32]; \ |
| int r; \ |
| \ |
| 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); \ |
| r = printk(kern_level "pci %s: [PE# %.3d] %pV", \ |
| pfix, pe->pe_number, &vaf); \ |
| \ |
| va_end(args); \ |
| \ |
| return r; \ |
| } \ |
| |
| define_pe_printk_level(pe_err, KERN_ERR); |
| define_pe_printk_level(pe_warn, KERN_WARNING); |
| define_pe_printk_level(pe_info, KERN_INFO); |
| |
| static struct pci_dn *pnv_ioda_get_pdn(struct pci_dev *dev) |
| { |
| struct device_node *np; |
| |
| np = pci_device_to_OF_node(dev); |
| if (!np) |
| return NULL; |
| return PCI_DN(np); |
| } |
| |
| 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].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); |
| } |
| |
| /* 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 = pnv_ioda_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_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 */ |
| 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; |
| } |
| opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number, |
| OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); |
| |
| /* Add to all parents PELT-V */ |
| while (parent) { |
| struct pci_dn *pdn = pnv_ioda_get_pdn(parent); |
| if (pdn && pdn->pe_number != IODA_INVALID_PE) { |
| rc = opal_pci_set_peltv(phb->opal_id, pdn->pe_number, |
| pe->pe_number, OPAL_ADD_PE_TO_DOMAIN); |
| /* XXX What to do in case of error ? */ |
| } |
| parent = parent->bus->self; |
| } |
| /* 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 = pe->pe_number; |
| rc = opal_pci_set_mve(phb->opal_id, pe->mve_number, |
| pe->pe_number); |
| if (rc) { |
| 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; |
| } |
| } |
| } else if (phb->type == PNV_PHB_IODA2) |
| pe->mve_number = 0; |
| |
| 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 = pnv_ioda_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 = pnv_ioda_get_pdn(dev); |
| |
| if (pdn == NULL) { |
| pr_warn("%s: No device node associated with device !\n", |
| pci_name(dev)); |
| continue; |
| } |
| pci_dev_get(dev); |
| 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; |
| |
| 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; |
| |
| list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { |
| pnv_ioda_setup_PEs(hose->bus); |
| } |
| } |
| |
| static void pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, struct pci_dev *dev) |
| { |
| /* We delay DMA setup after we have assigned all PE# */ |
| } |
| |
| static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, struct pci_bus *bus) |
| { |
| struct pci_dev *dev; |
| |
| list_for_each_entry(dev, &bus->devices, bus_list) { |
| set_iommu_table_base(&dev->dev, &pe->tce32_table); |
| if (dev->subordinate) |
| pnv_ioda_setup_bus_dma(pe, dev->subordinate); |
| } |
| } |
| |
| 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); |
| |
| /* 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. |
| */ |
| tbl->it_busno = 0; |
| tbl->it_index = (unsigned long)ioremap(be64_to_cpup(swinvp), 8); |
| tbl->it_type = TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE |
| | TCE_PCI_SWINV_PAIR; |
| } |
| iommu_init_table(tbl, phb->hose->node); |
| |
| if (pe->pdev) |
| set_iommu_table_base(&pe->pdev->dev, tbl); |
| else |
| pnv_ioda_setup_bus_dma(pe, pe->pbus); |
| |
| 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_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; |
| } |
| 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); |
| remaining -= segs; |
| base += segs; |
| } |
| } |
| |
| #ifdef CONFIG_PCI_MSI |
| static int pnv_pci_ioda_msi_setup(struct pnv_phb *phb, struct pci_dev *dev, |
| unsigned int hwirq, 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; |
| uint64_t addr64; |
| uint32_t addr32, 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; |
| |
| /* 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) { |
| 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 = addr64 >> 32; |
| msg->address_lo = addr64 & 0xfffffffful; |
| } else { |
| 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 = addr32; |
| } |
| msg->data = data; |
| |
| 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 bmap_size; |
| 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); |
| phb->msi_count = be32_to_cpup(prop + 1); |
| bmap_size = BITS_TO_LONGS(phb->msi_count) * sizeof(unsigned long); |
| phb->msi_map = zalloc_maybe_bootmem(bmap_size, GFP_KERNEL); |
| if (!phb->msi_map) { |
| 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", |
| phb->msi_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) { |
| region.start = res->start - |
| hose->pci_mem_offset - |
| phb->ioda.m32_pci_base; |
| region.end = res->end - |
| hose->pci_mem_offset - |
| 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_fixup(void) |
| { |
| pnv_pci_ioda_setup_PEs(); |
| pnv_pci_ioda_setup_seg(); |
| pnv_pci_ioda_setup_DMA(); |
| } |
| |
| /* |
| * 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 need support prefetchable memory window later */ |
| 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 = pnv_ioda_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]; |
| } |
| |
| void __init pnv_pci_init_ioda1_phb(struct device_node *np) |
| { |
| struct pci_controller *hose; |
| static int primary = 1; |
| struct pnv_phb *phb; |
| unsigned long size, m32map_off, iomap_off, pemap_off; |
| const u64 *prop64; |
| u64 phb_id; |
| void *aux; |
| long rc; |
| |
| pr_info(" Initializing IODA OPAL PHB %s\n", 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 = alloc_bootmem(sizeof(struct pnv_phb)); |
| if (phb) { |
| memset(phb, 0, sizeof(struct pnv_phb)); |
| phb->hose = hose = pcibios_alloc_controller(np); |
| } |
| if (!phb || !phb->hose) { |
| pr_err("PCI: Failed to allocate PCI controller for %s\n", |
| np->full_name); |
| return; |
| } |
| |
| spin_lock_init(&phb->lock); |
| /* XXX Use device-tree */ |
| hose->first_busno = 0; |
| hose->last_busno = 0xff; |
| hose->private_data = phb; |
| phb->opal_id = phb_id; |
| phb->type = PNV_PHB_IODA1; |
| |
| /* Detect specific models for error handling */ |
| if (of_device_is_compatible(np, "ibm,p7ioc-pciex")) |
| phb->model = PNV_PHB_MODEL_P7IOC; |
| else |
| phb->model = PNV_PHB_MODEL_UNKNOWN; |
| |
| /* We parse "ranges" now since we need to deduce the register base |
| * from the IO base |
| */ |
| pci_process_bridge_OF_ranges(phb->hose, np, primary); |
| primary = 0; |
| |
| /* Magic formula from Milton */ |
| phb->regs = of_iomap(np, 0); |
| if (phb->regs == NULL) |
| pr_err(" Failed to map registers !\n"); |
| |
| |
| /* XXX This is hack-a-thon. This needs to be changed so that: |
| * - we obtain stuff like PE# etc... from device-tree |
| * - we properly re-allocate M32 ourselves |
| * (the OFW one isn't very good) |
| */ |
| |
| /* Initialize more IODA stuff */ |
| phb->ioda.total_pe = 128; |
| |
| phb->ioda.m32_size = resource_size(&hose->mem_resources[0]); |
| /* OFW 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->pci_mem_offset; |
| 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 */ |
| 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]); |
| 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 = alloc_bootmem(size); |
| memset(aux, 0, size); |
| phb->ioda.pe_alloc = aux; |
| phb->ioda.m32_segmap = aux + m32map_off; |
| phb->ioda.io_segmap = aux + iomap_off; |
| phb->ioda.pe_array = aux + pemap_off; |
| set_bit(0, 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; |
| |
| /* Clear unusable m64 */ |
| hose->mem_resources[1].flags = 0; |
| hose->mem_resources[1].start = 0; |
| hose->mem_resources[1].end = 0; |
| hose->mem_resources[2].flags = 0; |
| hose->mem_resources[2].start = 0; |
| hose->mem_resources[2].end = 0; |
| |
| #if 0 |
| 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(" %d PE's M32: 0x%x [segment=0x%x] IO: 0x%x [segment=0x%x]\n", |
| phb->ioda.total_pe, |
| phb->ioda.m32_size, phb->ioda.m32_segsize, |
| phb->ioda.io_size, phb->ioda.io_segsize); |
| |
| if (phb->regs) { |
| pr_devel(" BUID = 0x%016llx\n", in_be64(phb->regs + 0x100)); |
| pr_devel(" PHB2_CR = 0x%016llx\n", in_be64(phb->regs + 0x160)); |
| pr_devel(" IO_BAR = 0x%016llx\n", in_be64(phb->regs + 0x170)); |
| pr_devel(" IO_BAMR = 0x%016llx\n", in_be64(phb->regs + 0x178)); |
| pr_devel(" IO_SAR = 0x%016llx\n", in_be64(phb->regs + 0x180)); |
| pr_devel(" M32_BAR = 0x%016llx\n", in_be64(phb->regs + 0x190)); |
| pr_devel(" M32_BAMR = 0x%016llx\n", in_be64(phb->regs + 0x198)); |
| pr_devel(" M32_SAR = 0x%016llx\n", in_be64(phb->regs + 0x1a0)); |
| } |
| phb->hose->ops = &pnv_pci_ops; |
| |
| /* 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; |
| |
| /* 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; |
| pci_add_flags(PCI_REASSIGN_ALL_RSRC); |
| |
| /* Reset IODA tables to a clean state */ |
| rc = opal_pci_reset(phb_id, OPAL_PCI_IODA_TABLE_RESET, OPAL_ASSERT_RESET); |
| if (rc) |
| pr_warning(" OPAL Error %ld performing IODA table reset !\n", rc); |
| opal_pci_set_pe(phb_id, 0, 0, 7, 1, 1 , OPAL_MAP_PE); |
| } |
| |
| void __init pnv_pci_init_ioda_hub(struct device_node *np) |
| { |
| struct device_node *phbn; |
| const u64 *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_ioda1_phb(phbn); |
| } |
| } |