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6
7#include <linux/pci.h>
8#include <linux/init.h>
9#include <linux/bootmem.h>
10#include <linux/gfp.h>
11#include <linux/capability.h>
12#include <linux/mm.h>
13#include <linux/errno.h>
14#include <linux/sched.h>
15#include <linux/dma-mapping.h>
16#include <linux/scatterlist.h>
17
18#include "proto.h"
19
20
21
22
23
24
25struct pci_controller *hose_head, **hose_tail = &hose_head;
26struct pci_controller *pci_isa_hose;
27
28
29struct pci_controller * __init
30alloc_pci_controller(void)
31{
32 struct pci_controller *hose;
33
34 hose = alloc_bootmem(sizeof(*hose));
35
36 *hose_tail = hose;
37 hose_tail = &hose->next;
38
39 return hose;
40}
41
42struct resource * __init
43alloc_resource(void)
44{
45 struct resource *res;
46
47 res = alloc_bootmem(sizeof(*res));
48
49 return res;
50}
51
52asmlinkage long
53sys_pciconfig_iobase(long which, unsigned long bus, unsigned long dfn)
54{
55 struct pci_controller *hose;
56
57
58 if (which & IOBASE_FROM_HOSE) {
59 for (hose = hose_head; hose; hose = hose->next)
60 if (hose->index == bus)
61 break;
62 if (!hose)
63 return -ENODEV;
64 } else {
65
66 if (bus == 0 && dfn == 0)
67 hose = pci_isa_hose;
68 else
69 return -ENODEV;
70 }
71
72 switch (which & ~IOBASE_FROM_HOSE) {
73 case IOBASE_HOSE:
74 return hose->index;
75 case IOBASE_SPARSE_MEM:
76 return hose->sparse_mem_base;
77 case IOBASE_DENSE_MEM:
78 return hose->dense_mem_base;
79 case IOBASE_SPARSE_IO:
80 return hose->sparse_io_base;
81 case IOBASE_DENSE_IO:
82 return hose->dense_io_base;
83 case IOBASE_ROOT_BUS:
84 return hose->bus->number;
85 }
86
87 return -EOPNOTSUPP;
88}
89
90asmlinkage long
91sys_pciconfig_read(unsigned long bus, unsigned long dfn,
92 unsigned long off, unsigned long len, void *buf)
93{
94 if (!capable(CAP_SYS_ADMIN))
95 return -EPERM;
96 else
97 return -ENODEV;
98}
99
100asmlinkage long
101sys_pciconfig_write(unsigned long bus, unsigned long dfn,
102 unsigned long off, unsigned long len, void *buf)
103{
104 if (!capable(CAP_SYS_ADMIN))
105 return -EPERM;
106 else
107 return -ENODEV;
108}
109
110static void *alpha_noop_alloc_coherent(struct device *dev, size_t size,
111 dma_addr_t *dma_handle, gfp_t gfp)
112{
113 void *ret;
114
115 if (!dev || *dev->dma_mask >= 0xffffffffUL)
116 gfp &= ~GFP_DMA;
117 ret = (void *)__get_free_pages(gfp, get_order(size));
118 if (ret) {
119 memset(ret, 0, size);
120 *dma_handle = virt_to_phys(ret);
121 }
122 return ret;
123}
124
125static void alpha_noop_free_coherent(struct device *dev, size_t size,
126 void *cpu_addr, dma_addr_t dma_addr)
127{
128 free_pages((unsigned long)cpu_addr, get_order(size));
129}
130
131static dma_addr_t alpha_noop_map_page(struct device *dev, struct page *page,
132 unsigned long offset, size_t size,
133 enum dma_data_direction dir,
134 struct dma_attrs *attrs)
135{
136 return page_to_pa(page) + offset;
137}
138
139static int alpha_noop_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
140 enum dma_data_direction dir, struct dma_attrs *attrs)
141{
142 int i;
143 struct scatterlist *sg;
144
145 for_each_sg(sgl, sg, nents, i) {
146 void *va;
147
148 BUG_ON(!sg_page(sg));
149 va = sg_virt(sg);
150 sg_dma_address(sg) = (dma_addr_t)virt_to_phys(va);
151 sg_dma_len(sg) = sg->length;
152 }
153
154 return nents;
155}
156
157static int alpha_noop_mapping_error(struct device *dev, dma_addr_t dma_addr)
158{
159 return 0;
160}
161
162static int alpha_noop_supported(struct device *dev, u64 mask)
163{
164 return mask < 0x00ffffffUL ? 0 : 1;
165}
166
167static int alpha_noop_set_mask(struct device *dev, u64 mask)
168{
169 if (!dev->dma_mask || !dma_supported(dev, mask))
170 return -EIO;
171
172 *dev->dma_mask = mask;
173 return 0;
174}
175
176struct dma_map_ops alpha_noop_ops = {
177 .alloc_coherent = alpha_noop_alloc_coherent,
178 .free_coherent = alpha_noop_free_coherent,
179 .map_page = alpha_noop_map_page,
180 .map_sg = alpha_noop_map_sg,
181 .mapping_error = alpha_noop_mapping_error,
182 .dma_supported = alpha_noop_supported,
183 .set_dma_mask = alpha_noop_set_mask,
184};
185
186struct dma_map_ops *dma_ops = &alpha_noop_ops;
187EXPORT_SYMBOL(dma_ops);
188
189void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
190{
191 return NULL;
192}
193
194void pci_iounmap(struct pci_dev *dev, void __iomem * addr)
195{
196}
197
198EXPORT_SYMBOL(pci_iomap);
199EXPORT_SYMBOL(pci_iounmap);
200
