Lines Matching +full:child +full:- +full:interrupt +full:- +full:base
1 // SPDX-License-Identifier: GPL-2.0
8 #include <linux/interrupt.h>
10 #include <linux/irqchip/irq-msi-lib.h>
15 #include <linux/pci-acpi.h>
16 #include <linux/pci-ecam.h>
56 * vendor-specific capability space
61 * Device may use MSI-X vector 0 for software triggering and will not
67 * Device can bypass remapping MSI-X transactions into its MSI-X table,
68 * avoiding the requirement of a VMD MSI domain for child device
69 * interrupt handling.
97 * struct vmd_irq - private data to map driver IRQ to the VMD shared vector
103 * Every MSI/MSI-X IRQ requested for a device in a VMD domain will be mapped to
114 * struct vmd_irq_list - list of driver requested IRQs mapping to a VMD vector
117 * @count: number of child IRQs assigned to this vector; used to track
119 * @virq: The underlying VMD Linux interrupt number
149 return container_of(bus->sysdata, struct vmd_dev, sysdata); in vmd_from_bus()
155 return irqs - vmd->irqs; in index_from_irqs()
161 * destination ID for the VMD MSI-X table. The VMD muxes interrupts in its
162 * domain into one of its own, and the VMD driver de-muxes these for the
168 struct vmd_irq *vmdirq = data->chip_data; in vmd_compose_msi_msg()
169 struct vmd_irq_list *irq = vmdirq->irq; in vmd_compose_msi_msg()
173 msg->address_hi = X86_MSI_BASE_ADDRESS_HIGH; in vmd_compose_msi_msg()
174 msg->arch_addr_lo.base_address = X86_MSI_BASE_ADDRESS_LOW; in vmd_compose_msi_msg()
175 msg->arch_addr_lo.destid_0_7 = index_from_irqs(vmd, irq); in vmd_compose_msi_msg()
180 struct vmd_irq *vmdirq = data->chip_data; in vmd_irq_enable()
183 WARN_ON(vmdirq->enabled); in vmd_irq_enable()
184 list_add_tail_rcu(&vmdirq->node, &vmdirq->irq->irq_list); in vmd_irq_enable()
185 vmdirq->enabled = true; in vmd_irq_enable()
191 vmd_irq_enable(data->parent_data); in vmd_pci_msi_enable()
192 data->chip->irq_unmask(data); in vmd_pci_msi_enable()
203 struct vmd_irq *vmdirq = data->chip_data; in vmd_irq_disable()
206 if (vmdirq->enabled) { in vmd_irq_disable()
207 list_del_rcu(&vmdirq->node); in vmd_irq_disable()
208 vmdirq->enabled = false; in vmd_irq_disable()
215 data->chip->irq_mask(data); in vmd_pci_msi_disable()
216 vmd_irq_disable(data->parent_data); in vmd_pci_msi_disable()
225 .name = "VMD-MSI",
237 if (vmd->msix_count == 1 + vmd->first_vec) in vmd_next_irq()
238 return &vmd->irqs[vmd->first_vec]; in vmd_next_irq()
241 * White list for fast-interrupt handlers. All others will share the in vmd_next_irq()
242 * "slow" interrupt vector. in vmd_next_irq()
244 switch (msi_desc_to_pci_dev(desc)->class) { in vmd_next_irq()
248 return &vmd->irqs[vmd->first_vec]; in vmd_next_irq()
252 best = vmd->first_vec + 1; in vmd_next_irq()
253 for (i = best; i < vmd->msix_count; i++) in vmd_next_irq()
254 if (vmd->irqs[i].count < vmd->irqs[best].count) in vmd_next_irq()
256 vmd->irqs[best].count++; in vmd_next_irq()
259 return &vmd->irqs[best]; in vmd_next_irq()
268 struct msi_desc *desc = ((msi_alloc_info_t *)arg)->desc; in vmd_msi_alloc()
269 struct vmd_dev *vmd = domain->host_data; in vmd_msi_alloc()
276 return -ENOMEM; in vmd_msi_alloc()
279 INIT_LIST_HEAD(&vmdirq->node); in vmd_msi_alloc()
280 vmdirq->irq = vmd_next_irq(vmd, desc); in vmd_msi_alloc()
281 vmdirq->virq = virq + i; in vmd_msi_alloc()
283 irq_domain_set_info(domain, virq + i, vmdirq->irq->virq, in vmd_msi_alloc()
299 vmdirq = irq_data->chip_data; in vmd_msi_free()
301 synchronize_srcu(&vmdirq->irq->srcu); in vmd_msi_free()
305 vmdirq->irq->count--; in vmd_msi_free()
323 info->chip->irq_startup = vmd_pci_msi_startup; in vmd_init_dev_msi_info()
324 info->chip->irq_shutdown = vmd_pci_msi_shutdown; in vmd_init_dev_msi_info()
325 info->chip->irq_enable = vmd_pci_msi_enable; in vmd_init_dev_msi_info()
326 info->chip->irq_disable = vmd_pci_msi_disable; in vmd_init_dev_msi_info()
338 .prefix = "VMD-",
345 .size = vmd->msix_count, in vmd_create_irq_domain()
350 info.fwnode = irq_domain_alloc_named_id_fwnode("VMD-MSI", in vmd_create_irq_domain()
351 vmd->sysdata.domain); in vmd_create_irq_domain()
353 return -ENODEV; in vmd_create_irq_domain()
355 vmd->irq_domain = msi_create_parent_irq_domain(&info, in vmd_create_irq_domain()
357 if (!vmd->irq_domain) { in vmd_create_irq_domain()
359 return -ENODEV; in vmd_create_irq_domain()
369 pci_read_config_word(vmd->dev, PCI_REG_VMCONFIG, ®); in vmd_set_msi_remapping()
372 pci_write_config_word(vmd->dev, PCI_REG_VMCONFIG, reg); in vmd_set_msi_remapping()
381 if (!vmd->msix_count) in vmd_remove_irq_domain()
384 if (vmd->irq_domain) { in vmd_remove_irq_domain()
385 struct fwnode_handle *fn = vmd->irq_domain->fwnode; in vmd_remove_irq_domain()
387 irq_domain_remove(vmd->irq_domain); in vmd_remove_irq_domain()
395 unsigned int busnr_ecam = bus->number - vmd->busn_start; in vmd_cfg_addr()
398 if (offset + len >= resource_size(&vmd->dev->resource[VMD_CFGBAR])) in vmd_cfg_addr()
401 return vmd->cfgbar + offset; in vmd_cfg_addr()
415 return -EFAULT; in vmd_pci_read()
417 guard(raw_spinlock_irqsave)(&vmd->cfg_lock); in vmd_pci_read()
429 return -EINVAL; in vmd_pci_read()
434 * VMD h/w converts non-posted config writes to posted memory writes. The
435 * read-back in this function forces the completion so it returns only after
445 return -EFAULT; in vmd_pci_write()
447 guard(raw_spinlock_irqsave)(&vmd->cfg_lock); in vmd_pci_write()
462 return -EINVAL; in vmd_pci_write()
477 if (pci_dev->bus->ops != &vmd_ops) in vmd_acpi_find_companion()
480 bridge = pci_find_host_bridge(pci_dev->bus); in vmd_acpi_find_companion()
481 busnr = pci_dev->bus->number - bridge->bus->number; in vmd_acpi_find_companion()
489 addr = (busnr << 24) | ((u32)pci_dev->devfn << 16) | 0x8000FFFFU; in vmd_acpi_find_companion()
491 dev_dbg(&pci_dev->dev, "Looking for ACPI companion (address 0x%x)\n", in vmd_acpi_find_companion()
494 return acpi_find_child_device(ACPI_COMPANION(bridge->dev.parent), addr, in vmd_acpi_find_companion()
523 u16 bus, max_buses = resource_size(&vmd->resources[0]); in vmd_domain_reset()
525 char __iomem *base; in vmd_domain_reset() local
529 base = vmd->cfgbar + PCIE_ECAM_OFFSET(bus, in vmd_domain_reset()
532 hdr_type = readb(base + PCI_HEADER_TYPE); in vmd_domain_reset()
536 base = vmd->cfgbar + PCIE_ECAM_OFFSET(bus, in vmd_domain_reset()
539 hdr_type = readb(base + PCI_HEADER_TYPE) & in vmd_domain_reset()
543 (readw(base + PCI_CLASS_DEVICE) != in vmd_domain_reset()
551 writel(0x0000ffff, base + PCI_IO_BASE_UPPER16); in vmd_domain_reset()
552 /* Update lower 16 bits of I/O base/limit */ in vmd_domain_reset()
553 writew(0x00f0, base + PCI_IO_BASE); in vmd_domain_reset()
554 /* Update upper 16 bits of I/O base/limit */ in vmd_domain_reset()
555 writel(0, base + PCI_IO_BASE_UPPER16); in vmd_domain_reset()
557 /* MMIO Base/Limit */ in vmd_domain_reset()
558 writel(0x0000fff0, base + PCI_MEMORY_BASE); in vmd_domain_reset()
560 /* Prefetchable MMIO Base/Limit */ in vmd_domain_reset()
561 writel(0, base + PCI_PREF_LIMIT_UPPER32); in vmd_domain_reset()
562 writel(0x0000fff0, base + PCI_PREF_MEMORY_BASE); in vmd_domain_reset()
563 writel(0xffffffff, base + PCI_PREF_BASE_UPPER32); in vmd_domain_reset()
571 vmd->dev->resource[VMD_MEMBAR1].child = &vmd->resources[1]; in vmd_attach_resources()
572 vmd->dev->resource[VMD_MEMBAR2].child = &vmd->resources[2]; in vmd_attach_resources()
577 vmd->dev->resource[VMD_MEMBAR1].child = NULL; in vmd_detach_resources()
578 vmd->dev->resource[VMD_MEMBAR2].child = NULL; in vmd_detach_resources()
601 struct pci_dev *dev = vmd->dev; in vmd_get_phys_offsets()
610 return -ENODEV; in vmd_get_phys_offsets()
617 return -ENOMEM; in vmd_get_phys_offsets()
624 /* Hypervisor-Emulated Vendor-Specific Capability */ in vmd_get_phys_offsets()
643 *offset1 = dev->resource[VMD_MEMBAR1].start - in vmd_get_phys_offsets()
645 *offset2 = dev->resource[VMD_MEMBAR2].start - in vmd_get_phys_offsets()
653 struct pci_dev *dev = vmd->dev; in vmd_get_bus_number_start()
662 vmd->busn_start = 0; in vmd_get_bus_number_start()
665 vmd->busn_start = 128; in vmd_get_bus_number_start()
668 vmd->busn_start = 224; in vmd_get_bus_number_start()
673 return -ENODEV; in vmd_get_bus_number_start()
686 idx = srcu_read_lock(&irqs->srcu); in vmd_irq()
687 list_for_each_entry_rcu(vmdirq, &irqs->irq_list, node) in vmd_irq()
688 generic_handle_irq(vmdirq->virq); in vmd_irq()
689 srcu_read_unlock(&irqs->srcu, idx); in vmd_irq()
696 struct pci_dev *dev = vmd->dev; in vmd_alloc_irqs()
699 vmd->msix_count = pci_msix_vec_count(dev); in vmd_alloc_irqs()
700 if (vmd->msix_count < 0) in vmd_alloc_irqs()
701 return -ENODEV; in vmd_alloc_irqs()
703 vmd->msix_count = pci_alloc_irq_vectors(dev, vmd->first_vec + 1, in vmd_alloc_irqs()
704 vmd->msix_count, PCI_IRQ_MSIX); in vmd_alloc_irqs()
705 if (vmd->msix_count < 0) in vmd_alloc_irqs()
706 return vmd->msix_count; in vmd_alloc_irqs()
708 vmd->irqs = devm_kcalloc(&dev->dev, vmd->msix_count, sizeof(*vmd->irqs), in vmd_alloc_irqs()
710 if (!vmd->irqs) in vmd_alloc_irqs()
711 return -ENOMEM; in vmd_alloc_irqs()
713 for (i = 0; i < vmd->msix_count; i++) { in vmd_alloc_irqs()
714 err = init_srcu_struct(&vmd->irqs[i].srcu); in vmd_alloc_irqs()
718 INIT_LIST_HEAD(&vmd->irqs[i].irq_list); in vmd_alloc_irqs()
719 vmd->irqs[i].virq = pci_irq_vector(dev, i); in vmd_alloc_irqs()
720 err = devm_request_irq(&dev->dev, vmd->irqs[i].virq, in vmd_alloc_irqs()
722 vmd->name, &vmd->irqs[i]); in vmd_alloc_irqs()
737 vmd_bridge->native_pcie_hotplug = root_bridge->native_pcie_hotplug; in vmd_copy_host_bridge_flags()
738 vmd_bridge->native_shpc_hotplug = root_bridge->native_shpc_hotplug; in vmd_copy_host_bridge_flags()
739 vmd_bridge->native_aer = root_bridge->native_aer; in vmd_copy_host_bridge_flags()
740 vmd_bridge->native_pme = root_bridge->native_pme; in vmd_copy_host_bridge_flags()
741 vmd_bridge->native_ltr = root_bridge->native_ltr; in vmd_copy_host_bridge_flags()
742 vmd_bridge->native_dpc = root_bridge->native_dpc; in vmd_copy_host_bridge_flags()
763 * Skip if the max snoop LTR is non-zero, indicating BIOS has set it in vmd_pm_enable_quirk()
774 * max non-snoop latency. in vmd_pm_enable_quirk()
782 * Ensure devices are in D0 before enabling PCI-PM L1 PM Substates, per in vmd_pm_enable_quirk()
792 struct pci_sysdata *sd = &vmd->sysdata; in vmd_enable_domain()
799 struct pci_bus *child; in vmd_enable_domain() local
806 * and child devices. These registers will either return the host value in vmd_enable_domain()
822 * limits the bus range to between 0-127, 128-255, or 224-255 in vmd_enable_domain()
830 res = &vmd->dev->resource[VMD_CFGBAR]; in vmd_enable_domain()
831 vmd->resources[0] = (struct resource) { in vmd_enable_domain()
833 .start = vmd->busn_start, in vmd_enable_domain()
834 .end = vmd->busn_start + (resource_size(res) >> 20) - 1, in vmd_enable_domain()
840 * put 32-bit resources in the window. in vmd_enable_domain()
842 * There's no hardware reason why a 64-bit window *couldn't* in vmd_enable_domain()
843 * contain a 32-bit resource, but pbus_size_mem() computes the in vmd_enable_domain()
844 * bridge window size assuming a 64-bit window will contain no in vmd_enable_domain()
845 * 32-bit resources. __pci_assign_resource() enforces that in vmd_enable_domain()
848 * The only way we could use a 64-bit non-prefetchable MEMBAR is in vmd_enable_domain()
849 * if its address is <4GB so that we can convert it to a 32-bit in vmd_enable_domain()
855 res = &vmd->dev->resource[VMD_MEMBAR1]; in vmd_enable_domain()
856 upper_bits = upper_32_bits(res->end); in vmd_enable_domain()
857 flags = res->flags & ~IORESOURCE_SIZEALIGN; in vmd_enable_domain()
860 vmd->resources[1] = (struct resource) { in vmd_enable_domain()
862 .start = res->start, in vmd_enable_domain()
863 .end = res->end, in vmd_enable_domain()
868 res = &vmd->dev->resource[VMD_MEMBAR2]; in vmd_enable_domain()
869 upper_bits = upper_32_bits(res->end); in vmd_enable_domain()
870 flags = res->flags & ~IORESOURCE_SIZEALIGN; in vmd_enable_domain()
873 vmd->resources[2] = (struct resource) { in vmd_enable_domain()
875 .start = res->start + membar2_offset, in vmd_enable_domain()
876 .end = res->end, in vmd_enable_domain()
881 sd->vmd_dev = vmd->dev; in vmd_enable_domain()
882 sd->domain = vmd_find_free_domain(); in vmd_enable_domain()
883 if (sd->domain < 0) in vmd_enable_domain()
884 return sd->domain; in vmd_enable_domain()
886 sd->node = pcibus_to_node(vmd->dev->bus); in vmd_enable_domain()
890 * due to some missing interrupt remapping plumbing. This is probably in vmd_enable_domain()
891 * acceptable because the guest is usually CPU-limited and MSI in vmd_enable_domain()
909 pci_add_resource(&resources, &vmd->resources[0]); in vmd_enable_domain()
910 pci_add_resource_offset(&resources, &vmd->resources[1], offset[0]); in vmd_enable_domain()
911 pci_add_resource_offset(&resources, &vmd->resources[2], offset[1]); in vmd_enable_domain()
913 vmd->bus = pci_create_root_bus(&vmd->dev->dev, vmd->busn_start, in vmd_enable_domain()
915 if (!vmd->bus) { in vmd_enable_domain()
918 return -ENODEV; in vmd_enable_domain()
921 vmd_copy_host_bridge_flags(pci_find_host_bridge(vmd->dev->bus), in vmd_enable_domain()
922 to_pci_host_bridge(vmd->bus->bridge)); in vmd_enable_domain()
925 if (vmd->irq_domain) in vmd_enable_domain()
926 dev_set_msi_domain(&vmd->bus->dev, vmd->irq_domain); in vmd_enable_domain()
928 dev_set_msi_domain(&vmd->bus->dev, in vmd_enable_domain()
929 dev_get_msi_domain(&vmd->dev->dev)); in vmd_enable_domain()
931 WARN(sysfs_create_link(&vmd->dev->dev.kobj, &vmd->bus->dev.kobj, in vmd_enable_domain()
936 pci_scan_child_bus(vmd->bus); in vmd_enable_domain()
942 * is why we pass a child device, so the reset can be triggered at in vmd_enable_domain()
946 list_for_each_entry(child, &vmd->bus->children, node) { in vmd_enable_domain()
947 if (!list_empty(&child->devices)) { in vmd_enable_domain()
948 dev = list_first_entry(&child->devices, in vmd_enable_domain()
958 pci_assign_unassigned_bus_resources(vmd->bus); in vmd_enable_domain()
960 pci_walk_bus(vmd->bus, vmd_pm_enable_quirk, &features); in vmd_enable_domain()
967 list_for_each_entry(child, &vmd->bus->children, node) in vmd_enable_domain()
968 pcie_bus_configure_settings(child); in vmd_enable_domain()
970 pci_bus_add_devices(vmd->bus); in vmd_enable_domain()
978 unsigned long features = (unsigned long) id->driver_data; in vmd_probe()
992 * interrupt controller and must configure interrupts. However in vmd_probe()
1000 if (resource_size(&dev->resource[VMD_CFGBAR]) < (1 << 20)) in vmd_probe()
1001 return -ENOMEM; in vmd_probe()
1003 vmd = devm_kzalloc(&dev->dev, sizeof(*vmd), GFP_KERNEL); in vmd_probe()
1005 return -ENOMEM; in vmd_probe()
1007 vmd->dev = dev; in vmd_probe()
1008 vmd->instance = ida_alloc(&vmd_instance_ida, GFP_KERNEL); in vmd_probe()
1009 if (vmd->instance < 0) in vmd_probe()
1010 return vmd->instance; in vmd_probe()
1012 vmd->name = devm_kasprintf(&dev->dev, GFP_KERNEL, "vmd%d", in vmd_probe()
1013 vmd->instance); in vmd_probe()
1014 if (!vmd->name) { in vmd_probe()
1015 err = -ENOMEM; in vmd_probe()
1023 vmd->cfgbar = pcim_iomap(dev, VMD_CFGBAR, 0); in vmd_probe()
1024 if (!vmd->cfgbar) { in vmd_probe()
1025 err = -ENOMEM; in vmd_probe()
1030 if (dma_set_mask_and_coherent(&dev->dev, DMA_BIT_MASK(64)) && in vmd_probe()
1031 dma_set_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32))) { in vmd_probe()
1032 err = -ENODEV; in vmd_probe()
1037 vmd->first_vec = 1; in vmd_probe()
1039 raw_spin_lock_init(&vmd->cfg_lock); in vmd_probe()
1045 dev_info(&vmd->dev->dev, "Bound to PCI domain %04x\n", in vmd_probe()
1046 vmd->sysdata.domain); in vmd_probe()
1050 ida_free(&vmd_instance_ida, vmd->instance); in vmd_probe()
1058 for (i = 0; i < vmd->msix_count; i++) in vmd_cleanup_srcu()
1059 cleanup_srcu_struct(&vmd->irqs[i].srcu); in vmd_cleanup_srcu()
1066 pci_stop_root_bus(vmd->bus); in vmd_remove()
1067 sysfs_remove_link(&vmd->dev->dev.kobj, "domain"); in vmd_remove()
1068 pci_remove_root_bus(vmd->bus); in vmd_remove()
1072 ida_free(&vmd_instance_ida, vmd->instance); in vmd_remove()
1089 for (i = 0; i < vmd->msix_count; i++) in vmd_suspend()
1090 devm_free_irq(dev, vmd->irqs[i].virq, &vmd->irqs[i]); in vmd_suspend()
1101 vmd_set_msi_remapping(vmd, !!vmd->irq_domain); in vmd_resume()
1103 for (i = 0; i < vmd->msix_count; i++) { in vmd_resume()
1104 err = devm_request_irq(dev, vmd->irqs[i].virq, in vmd_resume()
1106 vmd->name, &vmd->irqs[i]); in vmd_resume()