2 * MSI hooks for standard x86 apic
11 * Shifts for APIC-based data
14 #define MSI_DATA_VECTOR_SHIFT 0
15 #define MSI_DATA_VECTOR(v) (((u8)v) << MSI_DATA_VECTOR_SHIFT)
16 #define MSI_DATA_VECTOR_MASK 0xffffff00
18 #define MSI_DATA_DELIVERY_SHIFT 8
19 #define MSI_DATA_DELIVERY_FIXED (0 << MSI_DATA_DELIVERY_SHIFT)
20 #define MSI_DATA_DELIVERY_LOWPRI (1 << MSI_DATA_DELIVERY_SHIFT)
22 #define MSI_DATA_LEVEL_SHIFT 14
23 #define MSI_DATA_LEVEL_DEASSERT (0 << MSI_DATA_LEVEL_SHIFT)
24 #define MSI_DATA_LEVEL_ASSERT (1 << MSI_DATA_LEVEL_SHIFT)
26 #define MSI_DATA_TRIGGER_SHIFT 15
27 #define MSI_DATA_TRIGGER_EDGE (0 << MSI_DATA_TRIGGER_SHIFT)
28 #define MSI_DATA_TRIGGER_LEVEL (1 << MSI_DATA_TRIGGER_SHIFT)
31 * Shift/mask fields for APIC-based bus address
34 #define MSI_TARGET_CPU_SHIFT 4
35 #define MSI_ADDR_HEADER 0xfee00000
37 #define MSI_ADDR_DESTID_MASK 0xfff0000f
38 #define MSI_ADDR_DESTID_CPU(cpu) ((cpu) << MSI_TARGET_CPU_SHIFT)
40 #define MSI_ADDR_DESTMODE_SHIFT 2
41 #define MSI_ADDR_DESTMODE_PHYS (0 << MSI_ADDR_DESTMODE_SHIFT)
42 #define MSI_ADDR_DESTMODE_LOGIC (1 << MSI_ADDR_DESTMODE_SHIFT)
44 #define MSI_ADDR_REDIRECTION_SHIFT 3
45 #define MSI_ADDR_REDIRECTION_CPU (0 << MSI_ADDR_REDIRECTION_SHIFT)
46 #define MSI_ADDR_REDIRECTION_LOWPRI (1 << MSI_ADDR_REDIRECTION_SHIFT)
48 static struct irq_chip ia64_msi_chip;
51 static void ia64_set_msi_irq_affinity(unsigned int irq, cpumask_t cpu_mask)
55 int cpu = first_cpu(cpu_mask);
60 if (irq_prepare_move(irq, cpu))
63 read_msi_msg(irq, &msg);
65 addr = msg.address_lo;
66 addr &= MSI_ADDR_DESTID_MASK;
67 addr |= MSI_ADDR_DESTID_CPU(cpu_physical_id(cpu));
68 msg.address_lo = addr;
71 data &= MSI_DATA_VECTOR_MASK;
72 data |= MSI_DATA_VECTOR(irq_to_vector(irq));
75 write_msi_msg(irq, &msg);
76 irq_desc[irq].affinity = cpumask_of_cpu(cpu);
78 #endif /* CONFIG_SMP */
80 int ia64_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
83 unsigned long dest_phys_id;
91 set_irq_msi(irq, desc);
92 cpus_and(mask, irq_to_domain(irq), cpu_online_map);
93 dest_phys_id = cpu_physical_id(first_cpu(mask));
94 vector = irq_to_vector(irq);
99 MSI_ADDR_DESTMODE_PHYS |
100 MSI_ADDR_REDIRECTION_CPU |
101 MSI_ADDR_DESTID_CPU(dest_phys_id);
104 MSI_DATA_TRIGGER_EDGE |
105 MSI_DATA_LEVEL_ASSERT |
106 MSI_DATA_DELIVERY_FIXED |
107 MSI_DATA_VECTOR(vector);
109 write_msi_msg(irq, &msg);
110 set_irq_chip_and_handler(irq, &ia64_msi_chip, handle_edge_irq);
115 void ia64_teardown_msi_irq(unsigned int irq)
120 static void ia64_ack_msi_irq(unsigned int irq)
122 irq_complete_move(irq);
123 move_native_irq(irq);
127 static int ia64_msi_retrigger_irq(unsigned int irq)
129 unsigned int vector = irq_to_vector(irq);
130 ia64_resend_irq(vector);
136 * Generic ops used on most IA64 platforms.
138 static struct irq_chip ia64_msi_chip = {
140 .mask = mask_msi_irq,
141 .unmask = unmask_msi_irq,
142 .ack = ia64_ack_msi_irq,
144 .set_affinity = ia64_set_msi_irq_affinity,
146 .retrigger = ia64_msi_retrigger_irq,
150 int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
152 if (platform_setup_msi_irq)
153 return platform_setup_msi_irq(pdev, desc);
155 return ia64_setup_msi_irq(pdev, desc);
158 void arch_teardown_msi_irq(unsigned int irq)
160 if (platform_teardown_msi_irq)
161 return platform_teardown_msi_irq(irq);
163 return ia64_teardown_msi_irq(irq);