diff options
author | 2016-04-11 10:41:07 +0300 | |
---|---|---|
committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/arch/powerpc/platforms/powernv/pci.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/arch/powerpc/platforms/powernv/pci.c')
-rw-r--r-- | kernel/arch/powerpc/platforms/powernv/pci.c | 234 |
1 files changed, 147 insertions, 87 deletions
diff --git a/kernel/arch/powerpc/platforms/powernv/pci.c b/kernel/arch/powerpc/platforms/powernv/pci.c index bca2aeb6e..ad8c3f4a5 100644 --- a/kernel/arch/powerpc/platforms/powernv/pci.c +++ b/kernel/arch/powerpc/platforms/powernv/pci.c @@ -45,7 +45,7 @@ //#define cfg_dbg(fmt...) printk(fmt) #ifdef CONFIG_PCI_MSI -static int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type) +int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type) { struct pci_controller *hose = pci_bus_to_host(pdev->bus); struct pnv_phb *phb = hose->private_data; @@ -61,7 +61,7 @@ static int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type) if (pdev->no_64bit_msi && !phb->msi32_support) return -ENODEV; - list_for_each_entry(entry, &pdev->msi_list, list) { + for_each_pci_msi_entry(entry, pdev) { if (!entry->msi_attrib.is_64 && !phb->msi32_support) { pr_warn("%s: Supports only 64-bit MSIs\n", pci_name(pdev)); @@ -94,22 +94,23 @@ static int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type) return 0; } -static void pnv_teardown_msi_irqs(struct pci_dev *pdev) +void pnv_teardown_msi_irqs(struct pci_dev *pdev) { struct pci_controller *hose = pci_bus_to_host(pdev->bus); struct pnv_phb *phb = hose->private_data; struct msi_desc *entry; + irq_hw_number_t hwirq; if (WARN_ON(!phb)) return; - list_for_each_entry(entry, &pdev->msi_list, list) { + for_each_pci_msi_entry(entry, pdev) { if (entry->irq == NO_IRQ) continue; + hwirq = virq_to_hw(entry->irq); irq_set_msi_desc(entry->irq, NULL); - msi_bitmap_free_hwirqs(&phb->msi_bmp, - virq_to_hw(entry->irq) - phb->msi_base, 1); irq_dispose_mapping(entry->irq); + msi_bitmap_free_hwirqs(&phb->msi_bmp, hwirq - phb->msi_base, 1); } } #endif /* CONFIG_PCI_MSI */ @@ -572,80 +573,158 @@ struct pci_ops pnv_pci_ops = { .write = pnv_pci_write_config, }; -static int pnv_tce_build(struct iommu_table *tbl, long index, long npages, - unsigned long uaddr, enum dma_data_direction direction, - struct dma_attrs *attrs, bool rm) +static __be64 *pnv_tce(struct iommu_table *tbl, long idx) { - u64 proto_tce; - __be64 *tcep, *tces; - u64 rpn; + __be64 *tmp = ((__be64 *)tbl->it_base); + int level = tbl->it_indirect_levels; + const long shift = ilog2(tbl->it_level_size); + unsigned long mask = (tbl->it_level_size - 1) << (level * shift); + + while (level) { + int n = (idx & mask) >> (level * shift); + unsigned long tce = be64_to_cpu(tmp[n]); + + tmp = __va(tce & ~(TCE_PCI_READ | TCE_PCI_WRITE)); + idx &= ~mask; + mask >>= shift; + --level; + } - proto_tce = TCE_PCI_READ; // Read allowed + return tmp + idx; +} - if (direction != DMA_TO_DEVICE) - proto_tce |= TCE_PCI_WRITE; +int pnv_tce_build(struct iommu_table *tbl, long index, long npages, + unsigned long uaddr, enum dma_data_direction direction, + struct dma_attrs *attrs) +{ + u64 proto_tce = iommu_direction_to_tce_perm(direction); + u64 rpn = __pa(uaddr) >> tbl->it_page_shift; + long i; - tces = tcep = ((__be64 *)tbl->it_base) + index - tbl->it_offset; - rpn = __pa(uaddr) >> tbl->it_page_shift; + if (proto_tce & TCE_PCI_WRITE) + proto_tce |= TCE_PCI_READ; - while (npages--) - *(tcep++) = cpu_to_be64(proto_tce | - (rpn++ << tbl->it_page_shift)); + for (i = 0; i < npages; i++) { + unsigned long newtce = proto_tce | + ((rpn + i) << tbl->it_page_shift); + unsigned long idx = index - tbl->it_offset + i; - /* Some implementations won't cache invalid TCEs and thus may not - * need that flush. We'll probably turn it_type into a bit mask - * of flags if that becomes the case - */ - if (tbl->it_type & TCE_PCI_SWINV_CREATE) - pnv_pci_ioda_tce_invalidate(tbl, tces, tcep - 1, rm); + *(pnv_tce(tbl, idx)) = cpu_to_be64(newtce); + } return 0; } -static int pnv_tce_build_vm(struct iommu_table *tbl, long index, long npages, - unsigned long uaddr, - enum dma_data_direction direction, - struct dma_attrs *attrs) +#ifdef CONFIG_IOMMU_API +int pnv_tce_xchg(struct iommu_table *tbl, long index, + unsigned long *hpa, enum dma_data_direction *direction) { - return pnv_tce_build(tbl, index, npages, uaddr, direction, attrs, - false); + u64 proto_tce = iommu_direction_to_tce_perm(*direction); + unsigned long newtce = *hpa | proto_tce, oldtce; + unsigned long idx = index - tbl->it_offset; + + BUG_ON(*hpa & ~IOMMU_PAGE_MASK(tbl)); + + if (newtce & TCE_PCI_WRITE) + newtce |= TCE_PCI_READ; + + oldtce = xchg(pnv_tce(tbl, idx), cpu_to_be64(newtce)); + *hpa = be64_to_cpu(oldtce) & ~(TCE_PCI_READ | TCE_PCI_WRITE); + *direction = iommu_tce_direction(oldtce); + + return 0; } +#endif -static void pnv_tce_free(struct iommu_table *tbl, long index, long npages, - bool rm) +void pnv_tce_free(struct iommu_table *tbl, long index, long npages) { - __be64 *tcep, *tces; + long i; - tces = tcep = ((__be64 *)tbl->it_base) + index - tbl->it_offset; + for (i = 0; i < npages; i++) { + unsigned long idx = index - tbl->it_offset + i; - while (npages--) - *(tcep++) = cpu_to_be64(0); + *(pnv_tce(tbl, idx)) = cpu_to_be64(0); + } +} - if (tbl->it_type & TCE_PCI_SWINV_FREE) - pnv_pci_ioda_tce_invalidate(tbl, tces, tcep - 1, rm); +unsigned long pnv_tce_get(struct iommu_table *tbl, long index) +{ + return *(pnv_tce(tbl, index - tbl->it_offset)); } -static void pnv_tce_free_vm(struct iommu_table *tbl, long index, long npages) +struct iommu_table *pnv_pci_table_alloc(int nid) { - pnv_tce_free(tbl, index, npages, false); + struct iommu_table *tbl; + + tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, nid); + INIT_LIST_HEAD_RCU(&tbl->it_group_list); + + return tbl; } -static unsigned long pnv_tce_get(struct iommu_table *tbl, long index) +long pnv_pci_link_table_and_group(int node, int num, + struct iommu_table *tbl, + struct iommu_table_group *table_group) { - return ((u64 *)tbl->it_base)[index - tbl->it_offset]; + struct iommu_table_group_link *tgl = NULL; + + if (WARN_ON(!tbl || !table_group)) + return -EINVAL; + + tgl = kzalloc_node(sizeof(struct iommu_table_group_link), GFP_KERNEL, + node); + if (!tgl) + return -ENOMEM; + + tgl->table_group = table_group; + list_add_rcu(&tgl->next, &tbl->it_group_list); + + table_group->tables[num] = tbl; + + return 0; } -static int pnv_tce_build_rm(struct iommu_table *tbl, long index, long npages, - unsigned long uaddr, - enum dma_data_direction direction, - struct dma_attrs *attrs) +static void pnv_iommu_table_group_link_free(struct rcu_head *head) { - return pnv_tce_build(tbl, index, npages, uaddr, direction, attrs, true); + struct iommu_table_group_link *tgl = container_of(head, + struct iommu_table_group_link, rcu); + + kfree(tgl); } -static void pnv_tce_free_rm(struct iommu_table *tbl, long index, long npages) +void pnv_pci_unlink_table_and_group(struct iommu_table *tbl, + struct iommu_table_group *table_group) { - pnv_tce_free(tbl, index, npages, true); + long i; + bool found; + struct iommu_table_group_link *tgl; + + if (!tbl || !table_group) + return; + + /* Remove link to a group from table's list of attached groups */ + found = false; + list_for_each_entry_rcu(tgl, &tbl->it_group_list, next) { + if (tgl->table_group == table_group) { + list_del_rcu(&tgl->next); + call_rcu(&tgl->rcu, pnv_iommu_table_group_link_free); + found = true; + break; + } + } + if (WARN_ON(!found)) + return; + + /* Clean a pointer to iommu_table in iommu_table_group::tables[] */ + found = false; + for (i = 0; i < IOMMU_TABLE_GROUP_MAX_TABLES; ++i) { + if (table_group->tables[i] == tbl) { + table_group->tables[i] = NULL; + found = true; + break; + } + } + WARN_ON(!found); } void pnv_pci_setup_iommu_table(struct iommu_table *tbl, @@ -662,7 +741,7 @@ void pnv_pci_setup_iommu_table(struct iommu_table *tbl, tbl->it_type = TCE_PCI; } -static void pnv_pci_dma_dev_setup(struct pci_dev *pdev) +void pnv_pci_dma_dev_setup(struct pci_dev *pdev) { struct pci_controller *hose = pci_bus_to_host(pdev->bus); struct pnv_phb *phb = hose->private_data; @@ -689,37 +768,33 @@ static void pnv_pci_dma_dev_setup(struct pci_dev *pdev) phb->dma_dev_setup(phb, pdev); } -int pnv_pci_dma_set_mask(struct pci_dev *pdev, u64 dma_mask) +void pnv_pci_dma_bus_setup(struct pci_bus *bus) { - struct pci_controller *hose = pci_bus_to_host(pdev->bus); + struct pci_controller *hose = bus->sysdata; struct pnv_phb *phb = hose->private_data; + struct pnv_ioda_pe *pe; - if (phb && phb->dma_set_mask) - return phb->dma_set_mask(phb, pdev, dma_mask); - return __dma_set_mask(&pdev->dev, dma_mask); -} - -u64 pnv_pci_dma_get_required_mask(struct pci_dev *pdev) -{ - struct pci_controller *hose = pci_bus_to_host(pdev->bus); - struct pnv_phb *phb = hose->private_data; + list_for_each_entry(pe, &phb->ioda.pe_list, list) { + if (!(pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL))) + continue; - if (phb && phb->dma_get_required_mask) - return phb->dma_get_required_mask(phb, pdev); + if (!pe->pbus) + continue; - return __dma_get_required_mask(&pdev->dev); + if (bus->number == ((pe->rid >> 8) & 0xFF)) { + pe->pbus = bus; + break; + } + } } void pnv_pci_shutdown(void) { struct pci_controller *hose; - list_for_each_entry(hose, &hose_list, list_node) { - struct pnv_phb *phb = hose->private_data; - - if (phb && phb->shutdown) - phb->shutdown(phb); - } + list_for_each_entry(hose, &hose_list, list_node) + if (hose->controller_ops.shutdown) + hose->controller_ops.shutdown(hose); } /* Fixup wrong class code in p7ioc and p8 root complex */ @@ -762,22 +837,7 @@ void __init pnv_pci_init(void) pci_devs_phb_init(); /* Configure IOMMU DMA hooks */ - ppc_md.tce_build = pnv_tce_build_vm; - ppc_md.tce_free = pnv_tce_free_vm; - ppc_md.tce_build_rm = pnv_tce_build_rm; - ppc_md.tce_free_rm = pnv_tce_free_rm; - ppc_md.tce_get = pnv_tce_get; set_pci_dma_ops(&dma_iommu_ops); - - /* Configure MSIs */ -#ifdef CONFIG_PCI_MSI - ppc_md.setup_msi_irqs = pnv_setup_msi_irqs; - ppc_md.teardown_msi_irqs = pnv_teardown_msi_irqs; -#endif } machine_subsys_initcall_sync(powernv, tce_iommu_bus_notifier_init); - -struct pci_controller_ops pnv_pci_controller_ops = { - .dma_dev_setup = pnv_pci_dma_dev_setup, -}; |