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fd58e55f MM |
1 | /* |
2 | * This file is subject to the terms and conditions of the GNU General Public | |
3 | * License. See the file "COPYING" in the main directory of this archive | |
4 | * for more details. | |
5 | * | |
6 | * Copyright (C) 2006 Silicon Graphics, Inc. All Rights Reserved. | |
7 | */ | |
8 | ||
83821d3f | 9 | #include <linux/types.h> |
3b7d1921 | 10 | #include <linux/irq.h> |
83821d3f MM |
11 | #include <linux/pci.h> |
12 | #include <linux/cpumask.h> | |
3b7d1921 | 13 | #include <linux/msi.h> |
83821d3f MM |
14 | |
15 | #include <asm/sn/addrs.h> | |
16 | #include <asm/sn/intr.h> | |
17 | #include <asm/sn/pcibus_provider_defs.h> | |
18 | #include <asm/sn/pcidev.h> | |
19 | #include <asm/sn/nodepda.h> | |
20 | ||
83821d3f MM |
21 | struct sn_msi_info { |
22 | u64 pci_addr; | |
23 | struct sn_irq_info *sn_irq_info; | |
24 | }; | |
25 | ||
3b7d1921 EB |
26 | static struct sn_msi_info sn_msi_info[NR_IRQS]; |
27 | ||
28 | static struct irq_chip sn_msi_chip; | |
83821d3f | 29 | |
3b7d1921 | 30 | void sn_teardown_msi_irq(unsigned int irq) |
83821d3f MM |
31 | { |
32 | nasid_t nasid; | |
33 | int widget; | |
34 | struct pci_dev *pdev; | |
35 | struct pcidev_info *sn_pdev; | |
36 | struct sn_irq_info *sn_irq_info; | |
37 | struct pcibus_bussoft *bussoft; | |
38 | struct sn_pcibus_provider *provider; | |
39 | ||
38bc0361 | 40 | sn_irq_info = sn_msi_info[irq].sn_irq_info; |
83821d3f MM |
41 | if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0) |
42 | return; | |
43 | ||
44 | sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; | |
45 | pdev = sn_pdev->pdi_linux_pcidev; | |
46 | provider = SN_PCIDEV_BUSPROVIDER(pdev); | |
47 | ||
48 | (*provider->dma_unmap)(pdev, | |
38bc0361 | 49 | sn_msi_info[irq].pci_addr, |
83821d3f | 50 | PCI_DMA_FROMDEVICE); |
38bc0361 | 51 | sn_msi_info[irq].pci_addr = 0; |
83821d3f MM |
52 | |
53 | bussoft = SN_PCIDEV_BUSSOFT(pdev); | |
54 | nasid = NASID_GET(bussoft->bs_base); | |
55 | widget = (nasid & 1) ? | |
56 | TIO_SWIN_WIDGETNUM(bussoft->bs_base) : | |
57 | SWIN_WIDGETNUM(bussoft->bs_base); | |
58 | ||
59 | sn_intr_free(nasid, widget, sn_irq_info); | |
38bc0361 | 60 | sn_msi_info[irq].sn_irq_info = NULL; |
83821d3f MM |
61 | |
62 | return; | |
63 | } | |
fd58e55f | 64 | |
3b7d1921 | 65 | int sn_setup_msi_irq(unsigned int irq, struct pci_dev *pdev) |
fd58e55f | 66 | { |
3b7d1921 EB |
67 | struct msi_msg msg; |
68 | struct msi_desc *entry; | |
83821d3f MM |
69 | int widget; |
70 | int status; | |
71 | nasid_t nasid; | |
72 | u64 bus_addr; | |
73 | struct sn_irq_info *sn_irq_info; | |
74 | struct pcibus_bussoft *bussoft = SN_PCIDEV_BUSSOFT(pdev); | |
75 | struct sn_pcibus_provider *provider = SN_PCIDEV_BUSPROVIDER(pdev); | |
76 | ||
5b912c10 | 77 | entry = get_irq_msi(irq); |
3b7d1921 EB |
78 | if (!entry->msi_attrib.is_64) |
79 | return -EINVAL; | |
80 | ||
83821d3f MM |
81 | if (bussoft == NULL) |
82 | return -EINVAL; | |
83 | ||
84 | if (provider == NULL || provider->dma_map_consistent == NULL) | |
85 | return -EINVAL; | |
86 | ||
87 | /* | |
88 | * Set up the vector plumbing. Let the prom (via sn_intr_alloc) | |
89 | * decide which cpu to direct this msi at by default. | |
90 | */ | |
91 | ||
92 | nasid = NASID_GET(bussoft->bs_base); | |
93 | widget = (nasid & 1) ? | |
94 | TIO_SWIN_WIDGETNUM(bussoft->bs_base) : | |
95 | SWIN_WIDGETNUM(bussoft->bs_base); | |
96 | ||
97 | sn_irq_info = kzalloc(sizeof(struct sn_irq_info), GFP_KERNEL); | |
98 | if (! sn_irq_info) | |
99 | return -ENOMEM; | |
100 | ||
38bc0361 | 101 | status = sn_intr_alloc(nasid, widget, sn_irq_info, irq, -1, -1); |
83821d3f MM |
102 | if (status) { |
103 | kfree(sn_irq_info); | |
104 | return -ENOMEM; | |
105 | } | |
106 | ||
107 | sn_irq_info->irq_int_bit = -1; /* mark this as an MSI irq */ | |
108 | sn_irq_fixup(pdev, sn_irq_info); | |
109 | ||
110 | /* Prom probably should fill these in, but doesn't ... */ | |
111 | sn_irq_info->irq_bridge_type = bussoft->bs_asic_type; | |
112 | sn_irq_info->irq_bridge = (void *)bussoft->bs_base; | |
113 | ||
fd58e55f | 114 | /* |
83821d3f | 115 | * Map the xio address into bus space |
fd58e55f | 116 | */ |
83821d3f MM |
117 | bus_addr = (*provider->dma_map_consistent)(pdev, |
118 | sn_irq_info->irq_xtalkaddr, | |
119 | sizeof(sn_irq_info->irq_xtalkaddr), | |
120 | SN_DMA_MSI|SN_DMA_ADDR_XIO); | |
121 | if (! bus_addr) { | |
122 | sn_intr_free(nasid, widget, sn_irq_info); | |
123 | kfree(sn_irq_info); | |
124 | return -ENOMEM; | |
125 | } | |
126 | ||
38bc0361 EB |
127 | sn_msi_info[irq].sn_irq_info = sn_irq_info; |
128 | sn_msi_info[irq].pci_addr = bus_addr; | |
83821d3f | 129 | |
3b7d1921 EB |
130 | msg.address_hi = (u32)(bus_addr >> 32); |
131 | msg.address_lo = (u32)(bus_addr & 0x00000000ffffffff); | |
83821d3f MM |
132 | |
133 | /* | |
134 | * In the SN platform, bit 16 is a "send vector" bit which | |
135 | * must be present in order to move the vector through the system. | |
136 | */ | |
3b7d1921 | 137 | msg.data = 0x100 + irq; |
83821d3f | 138 | |
3b7d1921 EB |
139 | write_msi_msg(irq, &msg); |
140 | set_irq_chip_and_handler(irq, &sn_msi_chip, handle_edge_irq); | |
141 | ||
83821d3f MM |
142 | return 0; |
143 | } | |
144 | ||
3b7d1921 EB |
145 | #ifdef CONFIG_SMP |
146 | static void sn_set_msi_irq_affinity(unsigned int irq, cpumask_t cpu_mask) | |
83821d3f | 147 | { |
3b7d1921 | 148 | struct msi_msg msg; |
83821d3f MM |
149 | int slice; |
150 | nasid_t nasid; | |
151 | u64 bus_addr; | |
152 | struct pci_dev *pdev; | |
153 | struct pcidev_info *sn_pdev; | |
154 | struct sn_irq_info *sn_irq_info; | |
155 | struct sn_irq_info *new_irq_info; | |
156 | struct sn_pcibus_provider *provider; | |
38bc0361 | 157 | unsigned int cpu; |
83821d3f | 158 | |
38bc0361 EB |
159 | cpu = first_cpu(cpu_mask); |
160 | sn_irq_info = sn_msi_info[irq].sn_irq_info; | |
83821d3f MM |
161 | if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0) |
162 | return; | |
163 | ||
164 | /* | |
165 | * Release XIO resources for the old MSI PCI address | |
166 | */ | |
167 | ||
3b7d1921 | 168 | read_msi_msg(irq, &msg); |
83821d3f MM |
169 | sn_pdev = (struct pcidev_info *)sn_irq_info->irq_pciioinfo; |
170 | pdev = sn_pdev->pdi_linux_pcidev; | |
171 | provider = SN_PCIDEV_BUSPROVIDER(pdev); | |
172 | ||
3b7d1921 | 173 | bus_addr = (u64)(msg.address_hi) << 32 | (u64)(msg.address_lo); |
83821d3f | 174 | (*provider->dma_unmap)(pdev, bus_addr, PCI_DMA_FROMDEVICE); |
38bc0361 | 175 | sn_msi_info[irq].pci_addr = 0; |
83821d3f MM |
176 | |
177 | nasid = cpuid_to_nasid(cpu); | |
178 | slice = cpuid_to_slice(cpu); | |
179 | ||
180 | new_irq_info = sn_retarget_vector(sn_irq_info, nasid, slice); | |
38bc0361 | 181 | sn_msi_info[irq].sn_irq_info = new_irq_info; |
83821d3f MM |
182 | if (new_irq_info == NULL) |
183 | return; | |
184 | ||
185 | /* | |
186 | * Map the xio address into bus space | |
187 | */ | |
188 | ||
189 | bus_addr = (*provider->dma_map_consistent)(pdev, | |
190 | new_irq_info->irq_xtalkaddr, | |
191 | sizeof(new_irq_info->irq_xtalkaddr), | |
192 | SN_DMA_MSI|SN_DMA_ADDR_XIO); | |
193 | ||
38bc0361 | 194 | sn_msi_info[irq].pci_addr = bus_addr; |
3b7d1921 EB |
195 | msg.address_hi = (u32)(bus_addr >> 32); |
196 | msg.address_lo = (u32)(bus_addr & 0x00000000ffffffff); | |
197 | ||
198 | write_msi_msg(irq, &msg); | |
199 | set_native_irq_info(irq, cpu_mask); | |
83821d3f | 200 | } |
3b7d1921 | 201 | #endif /* CONFIG_SMP */ |
83821d3f | 202 | |
3b7d1921 EB |
203 | static void sn_ack_msi_irq(unsigned int irq) |
204 | { | |
205 | move_native_irq(irq); | |
206 | ia64_eoi(); | |
207 | } | |
83821d3f | 208 | |
3b7d1921 | 209 | static int sn_msi_retrigger_irq(unsigned int irq) |
83821d3f | 210 | { |
3b7d1921 EB |
211 | unsigned int vector = irq; |
212 | ia64_resend_irq(vector); | |
83821d3f | 213 | |
3b7d1921 | 214 | return 1; |
fd58e55f | 215 | } |
3b7d1921 EB |
216 | |
217 | static struct irq_chip sn_msi_chip = { | |
218 | .name = "PCI-MSI", | |
219 | .mask = mask_msi_irq, | |
220 | .unmask = unmask_msi_irq, | |
221 | .ack = sn_ack_msi_irq, | |
222 | #ifdef CONFIG_SMP | |
223 | .set_affinity = sn_set_msi_irq_affinity, | |
224 | #endif | |
225 | .retrigger = sn_msi_retrigger_irq, | |
226 | }; |