1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/*
* MSI hooks for standard x86 apic
*/
#include <linux/pci.h>
#include <linux/irq.h>
#include <linux/msi.h>
#include <linux/dmar.h>
#include <asm/smp.h>
#include <asm/msidef.h>
static struct irq_chip ia64_msi_chip;
#ifdef CONFIG_SMP
static int ia64_set_msi_irq_affinity(struct irq_data *idata,
const cpumask_t *cpu_mask, bool force)
{
struct msi_msg msg;
u32 addr, data;
int cpu = first_cpu(*cpu_mask);
unsigned int irq = idata->irq;
if (!cpu_online(cpu))
return -1;
if (irq_prepare_move(irq, cpu))
return -1;
get_cached_msi_msg(irq, &msg);
addr = msg.address_lo;
addr &= MSI_ADDR_DEST_ID_MASK;
addr |= MSI_ADDR_DEST_ID_CPU(cpu_physical_id(cpu));
msg.address_lo = addr;
data = msg.data;
data &= MSI_DATA_VECTOR_MASK;
data |= MSI_DATA_VECTOR(irq_to_vector(irq));
msg.data = data;
write_msi_msg(irq, &msg);
cpumask_copy(idata->affinity, cpumask_of(cpu));
return 0;
}
#endif /* CONFIG_SMP */
int ia64_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
{
struct msi_msg msg;
unsigned long dest_phys_id;
int irq, vector;
cpumask_t mask;
irq = create_irq();
if (irq < 0)
return irq;
irq_set_msi_desc(irq, desc);
cpus_and(mask, irq_to_domain(irq), cpu_online_map);
dest_phys_id = cpu_physical_id(first_cpu(mask));
vector = irq_to_vector(irq);
msg.address_hi = 0;
msg.address_lo =
MSI_ADDR_HEADER |
MSI_ADDR_DEST_MODE_PHYS |
MSI_ADDR_REDIRECTION_CPU |
MSI_ADDR_DEST_ID_CPU(dest_phys_id);
msg.data =
MSI_DATA_TRIGGER_EDGE |
MSI_DATA_LEVEL_ASSERT |
MSI_DATA_DELIVERY_FIXED |
MSI_DATA_VECTOR(vector);
write_msi_msg(irq, &msg);
irq_set_chip_and_handler(irq, &ia64_msi_chip, handle_edge_irq);
return 0;
}
void ia64_teardown_msi_irq(unsigned int irq)
{
destroy_irq(irq);
}
static void ia64_ack_msi_irq(struct irq_data *data)
{
irq_complete_move(data->irq);
irq_move_irq(data);
ia64_eoi();
}
static int ia64_msi_retrigger_irq(struct irq_data *data)
{
unsigned int vector = irq_to_vector(data->irq);
ia64_resend_irq(vector);
return 1;
}
/*
* Generic ops used on most IA64 platforms.
*/
static struct irq_chip ia64_msi_chip = {
.name = "PCI-MSI",
.irq_mask = mask_msi_irq,
.irq_unmask = unmask_msi_irq,
.irq_ack = ia64_ack_msi_irq,
#ifdef CONFIG_SMP
.irq_set_affinity = ia64_set_msi_irq_affinity,
#endif
.irq_retrigger = ia64_msi_retrigger_irq,
};
int arch_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *desc)
{
if (platform_setup_msi_irq)
return platform_setup_msi_irq(pdev, desc);
return ia64_setup_msi_irq(pdev, desc);
}
void arch_teardown_msi_irq(unsigned int irq)
{
if (platform_teardown_msi_irq)
return platform_teardown_msi_irq(irq);
return ia64_teardown_msi_irq(irq);
}
#ifdef CONFIG_INTEL_IOMMU
#ifdef CONFIG_SMP
static int dmar_msi_set_affinity(struct irq_data *data,
const struct cpumask *mask, bool force)
{
unsigned int irq = data->irq;
struct irq_cfg *cfg = irq_cfg + irq;
struct msi_msg msg;
int cpu = cpumask_first(mask);
if (!cpu_online(cpu))
return -1;
if (irq_prepare_move(irq, cpu))
return -1;
dmar_msi_read(irq, &msg);
msg.data &= ~MSI_DATA_VECTOR_MASK;
msg.data |= MSI_DATA_VECTOR(cfg->vector);
msg.address_lo &= ~MSI_ADDR_DEST_ID_MASK;
msg.address_lo |= MSI_ADDR_DEST_ID_CPU(cpu_physical_id(cpu));
dmar_msi_write(irq, &msg);
cpumask_copy(data->affinity, mask);
return 0;
}
#endif /* CONFIG_SMP */
static struct irq_chip dmar_msi_type = {
.name = "DMAR_MSI",
.irq_unmask = dmar_msi_unmask,
.irq_mask = dmar_msi_mask,
.irq_ack = ia64_ack_msi_irq,
#ifdef CONFIG_SMP
.irq_set_affinity = dmar_msi_set_affinity,
#endif
.irq_retrigger = ia64_msi_retrigger_irq,
};
static int
msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_msg *msg)
{
struct irq_cfg *cfg = irq_cfg + irq;
unsigned dest;
cpumask_t mask;
cpus_and(mask, irq_to_domain(irq), cpu_online_map);
dest = cpu_physical_id(first_cpu(mask));
msg->address_hi = 0;
msg->address_lo =
MSI_ADDR_HEADER |
MSI_ADDR_DEST_MODE_PHYS |
MSI_ADDR_REDIRECTION_CPU |
MSI_ADDR_DEST_ID_CPU(dest);
msg->data =
MSI_DATA_TRIGGER_EDGE |
MSI_DATA_LEVEL_ASSERT |
MSI_DATA_DELIVERY_FIXED |
MSI_DATA_VECTOR(cfg->vector);
return 0;
}
int arch_setup_dmar_msi(unsigned int irq)
{
int ret;
struct msi_msg msg;
ret = msi_compose_msg(NULL, irq, &msg);
if (ret < 0)
return ret;
dmar_msi_write(irq, &msg);
irq_set_chip_and_handler_name(irq, &dmar_msi_type, handle_edge_irq,
"edge");
return 0;
}
#endif /* CONFIG_INTEL_IOMMU */
|
