diff options
Diffstat (limited to 'drivers/pci/msi-altix.c')
-rw-r--r-- | drivers/pci/msi-altix.c | 200 |
1 files changed, 196 insertions, 4 deletions
diff --git a/drivers/pci/msi-altix.c b/drivers/pci/msi-altix.c index 9bd240602c1e..bed4183a5e39 100644 --- a/drivers/pci/msi-altix.c +++ b/drivers/pci/msi-altix.c | |||
@@ -6,13 +6,205 @@ | |||
6 | * Copyright (C) 2006 Silicon Graphics, Inc. All Rights Reserved. | 6 | * Copyright (C) 2006 Silicon Graphics, Inc. All Rights Reserved. |
7 | */ | 7 | */ |
8 | 8 | ||
9 | #include <asm/errno.h> | 9 | #include <linux/types.h> |
10 | #include <linux/pci.h> | ||
11 | #include <linux/cpumask.h> | ||
12 | |||
13 | #include <asm/sn/addrs.h> | ||
14 | #include <asm/sn/intr.h> | ||
15 | #include <asm/sn/pcibus_provider_defs.h> | ||
16 | #include <asm/sn/pcidev.h> | ||
17 | #include <asm/sn/nodepda.h> | ||
18 | |||
19 | #include "msi.h" | ||
20 | |||
21 | struct sn_msi_info { | ||
22 | u64 pci_addr; | ||
23 | struct sn_irq_info *sn_irq_info; | ||
24 | }; | ||
25 | |||
26 | static struct sn_msi_info *sn_msi_info; | ||
27 | |||
28 | static void | ||
29 | sn_msi_teardown(unsigned int vector) | ||
30 | { | ||
31 | nasid_t nasid; | ||
32 | int widget; | ||
33 | struct pci_dev *pdev; | ||
34 | struct pcidev_info *sn_pdev; | ||
35 | struct sn_irq_info *sn_irq_info; | ||
36 | struct pcibus_bussoft *bussoft; | ||
37 | struct sn_pcibus_provider *provider; | ||
38 | |||
39 | sn_irq_info = sn_msi_info[vector].sn_irq_info; | ||
40 | if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0) | ||
41 | return; | ||
42 | |||
43 | sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; | ||
44 | pdev = sn_pdev->pdi_linux_pcidev; | ||
45 | provider = SN_PCIDEV_BUSPROVIDER(pdev); | ||
46 | |||
47 | (*provider->dma_unmap)(pdev, | ||
48 | sn_msi_info[vector].pci_addr, | ||
49 | PCI_DMA_FROMDEVICE); | ||
50 | sn_msi_info[vector].pci_addr = 0; | ||
51 | |||
52 | bussoft = SN_PCIDEV_BUSSOFT(pdev); | ||
53 | nasid = NASID_GET(bussoft->bs_base); | ||
54 | widget = (nasid & 1) ? | ||
55 | TIO_SWIN_WIDGETNUM(bussoft->bs_base) : | ||
56 | SWIN_WIDGETNUM(bussoft->bs_base); | ||
57 | |||
58 | sn_intr_free(nasid, widget, sn_irq_info); | ||
59 | sn_msi_info[vector].sn_irq_info = NULL; | ||
60 | |||
61 | return; | ||
62 | } | ||
10 | 63 | ||
11 | int | 64 | int |
12 | sn_msi_init(void) | 65 | sn_msi_setup(struct pci_dev *pdev, unsigned int vector, |
66 | u32 *addr_hi, u32 *addr_lo, u32 *data) | ||
13 | { | 67 | { |
68 | int widget; | ||
69 | int status; | ||
70 | nasid_t nasid; | ||
71 | u64 bus_addr; | ||
72 | struct sn_irq_info *sn_irq_info; | ||
73 | struct pcibus_bussoft *bussoft = SN_PCIDEV_BUSSOFT(pdev); | ||
74 | struct sn_pcibus_provider *provider = SN_PCIDEV_BUSPROVIDER(pdev); | ||
75 | |||
76 | if (bussoft == NULL) | ||
77 | return -EINVAL; | ||
78 | |||
79 | if (provider == NULL || provider->dma_map_consistent == NULL) | ||
80 | return -EINVAL; | ||
81 | |||
82 | /* | ||
83 | * Set up the vector plumbing. Let the prom (via sn_intr_alloc) | ||
84 | * decide which cpu to direct this msi at by default. | ||
85 | */ | ||
86 | |||
87 | nasid = NASID_GET(bussoft->bs_base); | ||
88 | widget = (nasid & 1) ? | ||
89 | TIO_SWIN_WIDGETNUM(bussoft->bs_base) : | ||
90 | SWIN_WIDGETNUM(bussoft->bs_base); | ||
91 | |||
92 | sn_irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL); | ||
93 | if (! sn_irq_info) | ||
94 | return -ENOMEM; | ||
95 | |||
96 | status = sn_intr_alloc(nasid, widget, sn_irq_info, vector, -1, -1); | ||
97 | if (status) { | ||
98 | kfree(sn_irq_info); | ||
99 | return -ENOMEM; | ||
100 | } | ||
101 | |||
102 | sn_irq_info->irq_int_bit = -1; /* mark this as an MSI irq */ | ||
103 | sn_irq_fixup(pdev, sn_irq_info); | ||
104 | |||
105 | /* Prom probably should fill these in, but doesn't ... */ | ||
106 | sn_irq_info->irq_bridge_type = bussoft->bs_asic_type; | ||
107 | sn_irq_info->irq_bridge = (void *)bussoft->bs_base; | ||
108 | |||
14 | /* | 109 | /* |
15 | * return error until MSI is supported on altix platforms | 110 | * Map the xio address into bus space |
16 | */ | 111 | */ |
17 | return -EINVAL; | 112 | bus_addr = (*provider->dma_map_consistent)(pdev, |
113 | sn_irq_info->irq_xtalkaddr, | ||
114 | sizeof(sn_irq_info->irq_xtalkaddr), | ||
115 | SN_DMA_MSI|SN_DMA_ADDR_XIO); | ||
116 | if (! bus_addr) { | ||
117 | sn_intr_free(nasid, widget, sn_irq_info); | ||
118 | kfree(sn_irq_info); | ||
119 | return -ENOMEM; | ||
120 | } | ||
121 | |||
122 | sn_msi_info[vector].sn_irq_info = sn_irq_info; | ||
123 | sn_msi_info[vector].pci_addr = bus_addr; | ||
124 | |||
125 | *addr_hi = (u32)(bus_addr >> 32); | ||
126 | *addr_lo = (u32)(bus_addr & 0x00000000ffffffff); | ||
127 | |||
128 | /* | ||
129 | * In the SN platform, bit 16 is a "send vector" bit which | ||
130 | * must be present in order to move the vector through the system. | ||
131 | */ | ||
132 | *data = 0x100 + (unsigned int)vector; | ||
133 | |||
134 | #ifdef CONFIG_SMP | ||
135 | set_irq_affinity_info((vector & 0xff), sn_irq_info->irq_cpuid, 0); | ||
136 | #endif | ||
137 | |||
138 | return 0; | ||
139 | } | ||
140 | |||
141 | static void | ||
142 | sn_msi_target(unsigned int vector, unsigned int cpu, | ||
143 | u32 *addr_hi, u32 *addr_lo) | ||
144 | { | ||
145 | int slice; | ||
146 | nasid_t nasid; | ||
147 | u64 bus_addr; | ||
148 | struct pci_dev *pdev; | ||
149 | struct pcidev_info *sn_pdev; | ||
150 | struct sn_irq_info *sn_irq_info; | ||
151 | struct sn_irq_info *new_irq_info; | ||
152 | struct sn_pcibus_provider *provider; | ||
153 | |||
154 | sn_irq_info = sn_msi_info[vector].sn_irq_info; | ||
155 | if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0) | ||
156 | return; | ||
157 | |||
158 | /* | ||
159 | * Release XIO resources for the old MSI PCI address | ||
160 | */ | ||
161 | |||
162 | sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; | ||
163 | pdev = sn_pdev->pdi_linux_pcidev; | ||
164 | provider = SN_PCIDEV_BUSPROVIDER(pdev); | ||
165 | |||
166 | bus_addr = (u64)(*addr_hi) << 32 | (u64)(*addr_lo); | ||
167 | (*provider->dma_unmap)(pdev, bus_addr, PCI_DMA_FROMDEVICE); | ||
168 | sn_msi_info[vector].pci_addr = 0; | ||
169 | |||
170 | nasid = cpuid_to_nasid(cpu); | ||
171 | slice = cpuid_to_slice(cpu); | ||
172 | |||
173 | new_irq_info = sn_retarget_vector(sn_irq_info, nasid, slice); | ||
174 | sn_msi_info[vector].sn_irq_info = new_irq_info; | ||
175 | if (new_irq_info == NULL) | ||
176 | return; | ||
177 | |||
178 | /* | ||
179 | * Map the xio address into bus space | ||
180 | */ | ||
181 | |||
182 | bus_addr = (*provider->dma_map_consistent)(pdev, | ||
183 | new_irq_info->irq_xtalkaddr, | ||
184 | sizeof(new_irq_info->irq_xtalkaddr), | ||
185 | SN_DMA_MSI|SN_DMA_ADDR_XIO); | ||
186 | |||
187 | sn_msi_info[vector].pci_addr = bus_addr; | ||
188 | *addr_hi = (u32)(bus_addr >> 32); | ||
189 | *addr_lo = (u32)(bus_addr & 0x00000000ffffffff); | ||
190 | } | ||
191 | |||
192 | struct msi_ops sn_msi_ops = { | ||
193 | .setup = sn_msi_setup, | ||
194 | .teardown = sn_msi_teardown, | ||
195 | #ifdef CONFIG_SMP | ||
196 | .target = sn_msi_target, | ||
197 | #endif | ||
198 | }; | ||
199 | |||
200 | int | ||
201 | sn_msi_init(void) | ||
202 | { | ||
203 | sn_msi_info = | ||
204 | kzalloc(sizeof(struct sn_msi_info) * NR_VECTORS, GFP_KERNEL); | ||
205 | if (! sn_msi_info) | ||
206 | return -ENOMEM; | ||
207 | |||
208 | msi_register(&sn_msi_ops); | ||
209 | return 0; | ||
18 | } | 210 | } |