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
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2006 Silicon Graphics, Inc. All Rights Reserved.
*/
#include <linux/types.h>
#include <linux/irq.h>
#include <linux/pci.h>
#include <linux/cpumask.h>
#include <linux/msi.h>
#include <linux/slab.h>
#include <asm/sn/addrs.h>
#include <asm/sn/intr.h>
#include <asm/sn/pcibus_provider_defs.h>
#include <asm/sn/pcidev.h>
#include <asm/sn/nodepda.h>
struct sn_msi_info {
u64 pci_addr;
struct sn_irq_info *sn_irq_info;
};
static struct sn_msi_info sn_msi_info[NR_IRQS];
static struct irq_chip sn_msi_chip;
void sn_teardown_msi_irq(unsigned int irq)
{
nasid_t nasid;
int widget;
struct pci_dev *pdev;
struct pcidev_info *sn_pdev;
struct sn_irq_info *sn_irq_info;
struct pcibus_bussoft *bussoft;
struct sn_pcibus_provider *provider;
sn_irq_info = sn_msi_info[irq].sn_irq_info;
if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0)
return;
sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
pdev = sn_pdev->pdi_linux_pcidev;
provider = SN_PCIDEV_BUSPROVIDER(pdev);
(*provider->dma_unmap)(pdev,
sn_msi_info[irq].pci_addr,
PCI_DMA_FROMDEVICE);
sn_msi_info[irq].pci_addr = 0;
bussoft = SN_PCIDEV_BUSSOFT(pdev);
nasid = NASID_GET(bussoft->bs_base);
widget = (nasid & 1) ?
TIO_SWIN_WIDGETNUM(bussoft->bs_base) :
SWIN_WIDGETNUM(bussoft->bs_base);
sn_intr_free(nasid, widget, sn_irq_info);
sn_msi_info[irq].sn_irq_info = NULL;
destroy_irq(irq);
}
int sn_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *entry)
{
struct msi_msg msg;
int widget;
int status;
nasid_t nasid;
u64 bus_addr;
struct sn_irq_info *sn_irq_info;
struct pcibus_bussoft *bussoft = SN_PCIDEV_BUSSOFT(pdev);
struct sn_pcibus_provider *provider = SN_PCIDEV_BUSPROVIDER(pdev);
int irq;
if (!entry->msi_attrib.is_64)
return -EINVAL;
if (bussoft == NULL)
return -EINVAL;
if (provider == NULL || provider->dma_map_consistent == NULL)
return -EINVAL;
irq = create_irq();
if (irq < 0)
return irq;
/*
* Set up the vector plumbing. Let the prom (via sn_intr_alloc)
* decide which cpu to direct this msi at by default.
*/
nasid = NASID_GET(bussoft->bs_base);
widget = (nasid & 1) ?
TIO_SWIN_WIDGETNUM(bussoft->bs_base) :
SWIN_WIDGETNUM(bussoft->bs_base);
sn_irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL);
if (! sn_irq_info) {
destroy_irq(irq);
return -ENOMEM;
}
status = sn_intr_alloc(nasid, widget, sn_irq_info, irq, -1, -1);
if (status) {
kfree(sn_irq_info);
destroy_irq(irq);
return -ENOMEM;
}
sn_irq_info->irq_int_bit = -1; /* mark this as an MSI irq */
sn_irq_fixup(pdev, sn_irq_info);
/* Prom probably should fill these in, but doesn't ... */
sn_irq_info->irq_bridge_type = bussoft->bs_asic_type;
sn_irq_info->irq_bridge = (void *)bussoft->bs_base;
/*
* Map the xio address into bus space
*/
bus_addr = (*provider->dma_map_consistent)(pdev,
sn_irq_info->irq_xtalkaddr,
sizeof(sn_irq_info->irq_xtalkaddr),
SN_DMA_MSI|SN_DMA_ADDR_XIO);
if (! bus_addr) {
sn_intr_free(nasid, widget, sn_irq_info);
kfree(sn_irq_info);
destroy_irq(irq);
return -ENOMEM;
}
sn_msi_info[irq].sn_irq_info = sn_irq_info;
sn_msi_info[irq].pci_addr = bus_addr;
msg.address_hi = (u32)(bus_addr >> 32);
msg.address_lo = (u32)(bus_addr & 0x00000000ffffffff);
/*
* In the SN platform, bit 16 is a "send vector" bit which
* must be present in order to move the vector through the system.
*/
msg.data = 0x100 + irq;
irq_set_msi_desc(irq, entry);
write_msi_msg(irq, &msg);
irq_set_chip_and_handler(irq, &sn_msi_chip, handle_edge_irq);
return 0;
}
#ifdef CONFIG_SMP
static int sn_set_msi_irq_affinity(struct irq_data *data,
const struct cpumask *cpu_mask, bool force)
{
struct msi_msg msg;
int slice;
nasid_t nasid;
u64 bus_addr;
struct pci_dev *pdev;
struct pcidev_info *sn_pdev;
struct sn_irq_info *sn_irq_info;
struct sn_irq_info *new_irq_info;
struct sn_pcibus_provider *provider;
unsigned int cpu, irq = data->irq;
cpu = cpumask_first_and(cpu_mask, cpu_online_mask);
sn_irq_info = sn_msi_info[irq].sn_irq_info;
if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0)
return -1;
/*
* Release XIO resources for the old MSI PCI address
*/
get_cached_msi_msg(irq, &msg);
sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo;
pdev = sn_pdev->pdi_linux_pcidev;
provider = SN_PCIDEV_BUSPROVIDER(pdev);
bus_addr = (u64)(msg.address_hi) << 32 | (u64)(msg.address_lo);
(*provider->dma_unmap)(pdev, bus_addr, PCI_DMA_FROMDEVICE);
sn_msi_info[irq].pci_addr = 0;
nasid = cpuid_to_nasid(cpu);
slice = cpuid_to_slice(cpu);
new_irq_info = sn_retarget_vector(sn_irq_info, nasid, slice);
sn_msi_info[irq].sn_irq_info = new_irq_info;
if (new_irq_info == NULL)
return -1;
/*
* Map the xio address into bus space
*/
bus_addr = (*provider->dma_map_consistent)(pdev,
new_irq_info->irq_xtalkaddr,
sizeof(new_irq_info->irq_xtalkaddr),
SN_DMA_MSI|SN_DMA_ADDR_XIO);
sn_msi_info[irq].pci_addr = bus_addr;
msg.address_hi = (u32)(bus_addr >> 32);
msg.address_lo = (u32)(bus_addr & 0x00000000ffffffff);
write_msi_msg(irq, &msg);
cpumask_copy(data->affinity, cpu_mask);
return 0;
}
#endif /* CONFIG_SMP */
static void sn_ack_msi_irq(struct irq_data *data)
{
irq_move_irq(data);
ia64_eoi();
}
static int sn_msi_retrigger_irq(struct irq_data *data)
{
unsigned int vector = data->irq;
ia64_resend_irq(vector);
return 1;
}
static struct irq_chip sn_msi_chip = {
.name = "PCI-MSI",
.irq_mask = mask_msi_irq,
.irq_unmask = unmask_msi_irq,
.irq_ack = sn_ack_msi_irq,
#ifdef CONFIG_SMP
.irq_set_affinity = sn_set_msi_irq_affinity,
#endif
.irq_retrigger = sn_msi_retrigger_irq,
};
|
