1 // SPDX-License-Identifier: GPL-2.0
3 * MSI hooks for standard x86 apic
9 #include <linux/dmar.h>
11 #include <asm/msidef.h>
13 static struct irq_chip ia64_msi_chip;
16 static int ia64_set_msi_irq_affinity(struct irq_data *idata,
17 const cpumask_t *cpu_mask, bool force)
21 int cpu = cpumask_first_and(cpu_mask, cpu_online_mask);
22 unsigned int irq = idata->irq;
24 if (irq_prepare_move(irq, cpu))
27 __get_cached_msi_msg(irq_data_get_msi_desc(idata), &msg);
29 addr = msg.address_lo;
30 addr &= MSI_ADDR_DEST_ID_MASK;
31 addr |= MSI_ADDR_DEST_ID_CPU(cpu_physical_id(cpu));
32 msg.address_lo = addr;
35 data &= MSI_DATA_VECTOR_MASK;
36 data |= MSI_DATA_VECTOR(irq_to_vector(irq));
39 pci_write_msi_msg(irq, &msg);
40 cpumask_copy(irq_data_get_affinity_mask(idata), cpumask_of(cpu));
44 #endif /* CONFIG_SMP */
46 int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
49 unsigned long dest_phys_id;
56 irq_set_msi_desc(irq, desc);
57 dest_phys_id = cpu_physical_id(cpumask_any_and(&(irq_to_domain(irq)),
59 vector = irq_to_vector(irq);
64 MSI_ADDR_DEST_MODE_PHYS |
65 MSI_ADDR_REDIRECTION_CPU |
66 MSI_ADDR_DEST_ID_CPU(dest_phys_id);
69 MSI_DATA_TRIGGER_EDGE |
70 MSI_DATA_LEVEL_ASSERT |
71 MSI_DATA_DELIVERY_FIXED |
72 MSI_DATA_VECTOR(vector);
74 pci_write_msi_msg(irq, &msg);
75 irq_set_chip_and_handler(irq, &ia64_msi_chip, handle_edge_irq);
80 void arch_teardown_msi_irq(unsigned int irq)
85 static void ia64_ack_msi_irq(struct irq_data *data)
87 irq_complete_move(data->irq);
92 static int ia64_msi_retrigger_irq(struct irq_data *data)
94 unsigned int vector = irq_to_vector(data->irq);
95 ia64_resend_irq(vector);
101 * Generic ops used on most IA64 platforms.
103 static struct irq_chip ia64_msi_chip = {
105 .irq_mask = pci_msi_mask_irq,
106 .irq_unmask = pci_msi_unmask_irq,
107 .irq_ack = ia64_ack_msi_irq,
109 .irq_set_affinity = ia64_set_msi_irq_affinity,
111 .irq_retrigger = ia64_msi_retrigger_irq,
114 #ifdef CONFIG_INTEL_IOMMU
116 static int dmar_msi_set_affinity(struct irq_data *data,
117 const struct cpumask *mask, bool force)
119 unsigned int irq = data->irq;
120 struct irq_cfg *cfg = irq_cfg + irq;
122 int cpu = cpumask_first_and(mask, cpu_online_mask);
124 if (irq_prepare_move(irq, cpu))
127 dmar_msi_read(irq, &msg);
129 msg.data &= ~MSI_DATA_VECTOR_MASK;
130 msg.data |= MSI_DATA_VECTOR(cfg->vector);
131 msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK;
132 msg.address_lo |= MSI_ADDR_DEST_ID_CPU(cpu_physical_id(cpu));
134 dmar_msi_write(irq, &msg);
135 cpumask_copy(irq_data_get_affinity_mask(data), mask);
139 #endif /* CONFIG_SMP */
141 static struct irq_chip dmar_msi_type = {
143 .irq_unmask = dmar_msi_unmask,
144 .irq_mask = dmar_msi_mask,
145 .irq_ack = ia64_ack_msi_irq,
147 .irq_set_affinity = dmar_msi_set_affinity,
149 .irq_retrigger = ia64_msi_retrigger_irq,
153 msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg)
155 struct irq_cfg *cfg = irq_cfg + irq;
158 dest = cpu_physical_id(cpumask_first_and(&(irq_to_domain(irq)),
164 MSI_ADDR_DEST_MODE_PHYS |
165 MSI_ADDR_REDIRECTION_CPU |
166 MSI_ADDR_DEST_ID_CPU(dest);
169 MSI_DATA_TRIGGER_EDGE |
170 MSI_DATA_LEVEL_ASSERT |
171 MSI_DATA_DELIVERY_FIXED |
172 MSI_DATA_VECTOR(cfg->vector);
175 int dmar_alloc_hwirq(int id, int node, void *arg)
182 irq_set_handler_data(irq, arg);
183 irq_set_chip_and_handler_name(irq, &dmar_msi_type,
184 handle_edge_irq, "edge");
185 msi_compose_msg(NULL, irq, &msg);
186 dmar_msi_write(irq, &msg);
192 void dmar_free_hwirq(int irq)
194 irq_set_handler_data(irq, NULL);
197 #endif /* CONFIG_INTEL_IOMMU */