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1 | /* |
1 | /* |
2 | * The PCI Library -- User Access |
2 | * The PCI Library -- User Access |
3 | * |
3 | * |
4 | * Copyright (c) 1997--2003 Martin Mares <mj@ucw.cz> |
4 | * Copyright (c) 1997--2003 Martin Mares <mj@ucw.cz> |
5 | * |
5 | * |
6 | * Modified and ported to HelenOS by Jakub Jermar. |
6 | * May 8, 2006 - Modified and ported to HelenOS by Jakub Jermar. |
7 | * |
7 | * |
8 | * Can be freely distributed and used under the terms of the GNU GPL. |
8 | * Can be freely distributed and used under the terms of the GNU GPL. |
9 | */ |
9 | */ |
10 | 10 | ||
11 | #include <stdio.h> |
11 | #include <stdio.h> |
12 | #include <stdlib.h> |
12 | #include <stdlib.h> |
13 | #include <stdarg.h> |
13 | #include <stdarg.h> |
14 | #include <string.h> |
14 | #include <string.h> |
15 | 15 | ||
16 | #include "internal.h" |
16 | #include "internal.h" |
17 | 17 | ||
18 | static struct pci_methods *pci_methods[PCI_ACCESS_MAX] = { |
18 | static struct pci_methods *pci_methods[PCI_ACCESS_MAX] = { |
19 | &pm_intel_conf1, |
19 | &pm_intel_conf1, |
20 | &pm_intel_conf2, |
20 | &pm_intel_conf2, |
21 | }; |
21 | }; |
22 | 22 | ||
23 | struct pci_access *pci_alloc(void) |
23 | struct pci_access *pci_alloc(void) |
24 | { |
24 | { |
25 | struct pci_access *a = malloc(sizeof(struct pci_access)); |
25 | struct pci_access *a = malloc(sizeof(struct pci_access)); |
26 | int i; |
26 | int i; |
27 | 27 | ||
28 | if (!a) |
28 | if (!a) |
29 | return NULL; |
29 | return NULL; |
30 | 30 | ||
31 | bzero(a, sizeof(*a)); |
31 | bzero(a, sizeof(*a)); |
32 | for (i = 0; i < PCI_ACCESS_MAX; i++) |
32 | for (i = 0; i < PCI_ACCESS_MAX; i++) |
33 | if (pci_methods[i] && pci_methods[i]->config) |
33 | if (pci_methods[i] && pci_methods[i]->config) |
34 | pci_methods[i]->config(a); |
34 | pci_methods[i]->config(a); |
35 | return a; |
35 | return a; |
36 | } |
36 | } |
37 | 37 | ||
38 | void *pci_malloc(struct pci_access *a, int size) |
38 | void *pci_malloc(struct pci_access *a, int size) |
39 | { |
39 | { |
40 | void *x = malloc(size); |
40 | void *x = malloc(size); |
41 | 41 | ||
42 | if (!x) |
42 | if (!x) |
43 | a->error("Out of memory (allocation of %d bytes failed)", size); |
43 | a->error("Out of memory (allocation of %d bytes failed)", size); |
44 | return x; |
44 | return x; |
45 | } |
45 | } |
46 | 46 | ||
47 | void pci_mfree(void *x) |
47 | void pci_mfree(void *x) |
48 | { |
48 | { |
49 | if (x) |
49 | if (x) |
50 | free(x); |
50 | free(x); |
51 | } |
51 | } |
52 | 52 | ||
53 | static void pci_generic_error(char *msg, ...) |
53 | static void pci_generic_error(char *msg, ...) |
54 | { |
54 | { |
55 | va_list args; |
55 | va_list args; |
56 | 56 | ||
57 | va_start(args, msg); |
57 | va_start(args, msg); |
58 | puts("pcilib: "); |
58 | puts("pcilib: "); |
59 | vprintf(msg, args); |
59 | vprintf(msg, args); |
60 | putchar('\n'); |
60 | putchar('\n'); |
61 | exit(1); |
61 | exit(1); |
62 | } |
62 | } |
63 | 63 | ||
64 | static void pci_generic_warn(char *msg, ...) |
64 | static void pci_generic_warn(char *msg, ...) |
65 | { |
65 | { |
66 | va_list args; |
66 | va_list args; |
67 | 67 | ||
68 | va_start(args, msg); |
68 | va_start(args, msg); |
69 | puts("pcilib: "); |
69 | puts("pcilib: "); |
70 | vprintf(msg, args); |
70 | vprintf(msg, args); |
71 | putchar('\n'); |
71 | putchar('\n'); |
72 | } |
72 | } |
73 | 73 | ||
74 | static void pci_generic_debug(char *msg, ...) |
74 | static void pci_generic_debug(char *msg, ...) |
75 | { |
75 | { |
76 | va_list args; |
76 | va_list args; |
77 | 77 | ||
78 | va_start(args, msg); |
78 | va_start(args, msg); |
79 | vprintf(msg, args); |
79 | vprintf(msg, args); |
80 | va_end(args); |
80 | va_end(args); |
81 | } |
81 | } |
82 | 82 | ||
83 | static void pci_null_debug(char *msg UNUSED, ...) |
83 | static void pci_null_debug(char *msg UNUSED, ...) |
84 | { |
84 | { |
85 | } |
85 | } |
86 | 86 | ||
87 | void pci_init(struct pci_access *a) |
87 | void pci_init(struct pci_access *a) |
88 | { |
88 | { |
89 | if (!a->error) |
89 | if (!a->error) |
90 | a->error = pci_generic_error; |
90 | a->error = pci_generic_error; |
91 | if (!a->warning) |
91 | if (!a->warning) |
92 | a->warning = pci_generic_warn; |
92 | a->warning = pci_generic_warn; |
93 | if (!a->debug) |
93 | if (!a->debug) |
94 | a->debug = pci_generic_debug; |
94 | a->debug = pci_generic_debug; |
95 | if (!a->debugging) |
95 | if (!a->debugging) |
96 | a->debug = pci_null_debug; |
96 | a->debug = pci_null_debug; |
97 | 97 | ||
98 | if (a->method) { |
98 | if (a->method) { |
99 | if (a->method >= PCI_ACCESS_MAX || !pci_methods[a->method]) |
99 | if (a->method >= PCI_ACCESS_MAX || !pci_methods[a->method]) |
100 | a->error("This access method is not supported."); |
100 | a->error("This access method is not supported."); |
101 | a->methods = pci_methods[a->method]; |
101 | a->methods = pci_methods[a->method]; |
102 | } else { |
102 | } else { |
103 | unsigned int i; |
103 | unsigned int i; |
104 | for (i = 0; i < PCI_ACCESS_MAX; i++) |
104 | for (i = 0; i < PCI_ACCESS_MAX; i++) |
105 | if (pci_methods[i]) { |
105 | if (pci_methods[i]) { |
106 | a->debug("Trying method %d...", i); |
106 | a->debug("Trying method %d...", i); |
107 | if (pci_methods[i]->detect(a)) { |
107 | if (pci_methods[i]->detect(a)) { |
108 | a->debug("...OK\n"); |
108 | a->debug("...OK\n"); |
109 | a->methods = pci_methods[i]; |
109 | a->methods = pci_methods[i]; |
110 | a->method = i; |
110 | a->method = i; |
111 | break; |
111 | break; |
112 | } |
112 | } |
113 | a->debug("...No.\n"); |
113 | a->debug("...No.\n"); |
114 | } |
114 | } |
115 | if (!a->methods) |
115 | if (!a->methods) |
116 | a->error("Cannot find any working access method."); |
116 | a->error("Cannot find any working access method."); |
117 | } |
117 | } |
118 | a->debug("Decided to use %s\n", a->methods->name); |
118 | a->debug("Decided to use %s\n", a->methods->name); |
119 | a->methods->init(a); |
119 | a->methods->init(a); |
120 | } |
120 | } |
121 | 121 | ||
122 | void pci_cleanup(struct pci_access *a) |
122 | void pci_cleanup(struct pci_access *a) |
123 | { |
123 | { |
124 | struct pci_dev *d, *e; |
124 | struct pci_dev *d, *e; |
125 | 125 | ||
126 | for (d = a->devices; d; d = e) { |
126 | for (d = a->devices; d; d = e) { |
127 | e = d->next; |
127 | e = d->next; |
128 | pci_free_dev(d); |
128 | pci_free_dev(d); |
129 | } |
129 | } |
130 | if (a->methods) |
130 | if (a->methods) |
131 | a->methods->cleanup(a); |
131 | a->methods->cleanup(a); |
132 | pci_free_name_list(a); |
132 | pci_free_name_list(a); |
133 | pci_mfree(a); |
133 | pci_mfree(a); |
134 | } |
134 | } |
135 | 135 | ||
136 | void pci_scan_bus(struct pci_access *a) |
136 | void pci_scan_bus(struct pci_access *a) |
137 | { |
137 | { |
138 | a->methods->scan(a); |
138 | a->methods->scan(a); |
139 | } |
139 | } |
140 | 140 | ||
141 | struct pci_dev *pci_alloc_dev(struct pci_access *a) |
141 | struct pci_dev *pci_alloc_dev(struct pci_access *a) |
142 | { |
142 | { |
143 | struct pci_dev *d = pci_malloc(a, sizeof(struct pci_dev)); |
143 | struct pci_dev *d = pci_malloc(a, sizeof(struct pci_dev)); |
144 | 144 | ||
145 | bzero(d, sizeof(*d)); |
145 | bzero(d, sizeof(*d)); |
146 | d->access = a; |
146 | d->access = a; |
147 | d->methods = a->methods; |
147 | d->methods = a->methods; |
148 | d->hdrtype = -1; |
148 | d->hdrtype = -1; |
149 | if (d->methods->init_dev) |
149 | if (d->methods->init_dev) |
150 | d->methods->init_dev(d); |
150 | d->methods->init_dev(d); |
151 | return d; |
151 | return d; |
152 | } |
152 | } |
153 | 153 | ||
154 | int pci_link_dev(struct pci_access *a, struct pci_dev *d) |
154 | int pci_link_dev(struct pci_access *a, struct pci_dev *d) |
155 | { |
155 | { |
156 | d->next = a->devices; |
156 | d->next = a->devices; |
157 | a->devices = d; |
157 | a->devices = d; |
158 | 158 | ||
159 | return 1; |
159 | return 1; |
160 | } |
160 | } |
161 | 161 | ||
162 | struct pci_dev *pci_get_dev(struct pci_access *a, int domain, int bus, |
162 | struct pci_dev *pci_get_dev(struct pci_access *a, int domain, int bus, |
163 | int dev, int func) |
163 | int dev, int func) |
164 | { |
164 | { |
165 | struct pci_dev *d = pci_alloc_dev(a); |
165 | struct pci_dev *d = pci_alloc_dev(a); |
166 | 166 | ||
167 | d->domain = domain; |
167 | d->domain = domain; |
168 | d->bus = bus; |
168 | d->bus = bus; |
169 | d->dev = dev; |
169 | d->dev = dev; |
170 | d->func = func; |
170 | d->func = func; |
171 | return d; |
171 | return d; |
172 | } |
172 | } |
173 | 173 | ||
174 | void pci_free_dev(struct pci_dev *d) |
174 | void pci_free_dev(struct pci_dev *d) |
175 | { |
175 | { |
176 | if (d->methods->cleanup_dev) |
176 | if (d->methods->cleanup_dev) |
177 | d->methods->cleanup_dev(d); |
177 | d->methods->cleanup_dev(d); |
178 | pci_mfree(d); |
178 | pci_mfree(d); |
179 | } |
179 | } |
180 | 180 | ||
181 | static inline void |
181 | static inline void |
182 | pci_read_data(struct pci_dev *d, void *buf, int pos, int len) |
182 | pci_read_data(struct pci_dev *d, void *buf, int pos, int len) |
183 | { |
183 | { |
184 | if (pos & (len - 1)) |
184 | if (pos & (len - 1)) |
185 | d->access->error("Unaligned read: pos=%02x, len=%d", pos, |
185 | d->access->error("Unaligned read: pos=%02x, len=%d", pos, |
186 | len); |
186 | len); |
187 | if (pos + len <= d->cache_len) |
187 | if (pos + len <= d->cache_len) |
188 | memcpy(buf, d->cache + pos, len); |
188 | memcpy(buf, d->cache + pos, len); |
189 | else if (!d->methods->read(d, pos, buf, len)) |
189 | else if (!d->methods->read(d, pos, buf, len)) |
190 | memset(buf, 0xff, len); |
190 | memset(buf, 0xff, len); |
191 | } |
191 | } |
192 | 192 | ||
193 | byte pci_read_byte(struct pci_dev *d, int pos) |
193 | byte pci_read_byte(struct pci_dev *d, int pos) |
194 | { |
194 | { |
195 | byte buf; |
195 | byte buf; |
196 | pci_read_data(d, &buf, pos, 1); |
196 | pci_read_data(d, &buf, pos, 1); |
197 | return buf; |
197 | return buf; |
198 | } |
198 | } |
199 | 199 | ||
200 | word pci_read_word(struct pci_dev * d, int pos) |
200 | word pci_read_word(struct pci_dev * d, int pos) |
201 | { |
201 | { |
202 | word buf; |
202 | word buf; |
203 | pci_read_data(d, &buf, pos, 2); |
203 | pci_read_data(d, &buf, pos, 2); |
204 | return le16_to_cpu(buf); |
204 | return le16_to_cpu(buf); |
205 | } |
205 | } |
206 | 206 | ||
207 | u32 pci_read_long(struct pci_dev * d, int pos) |
207 | u32 pci_read_long(struct pci_dev * d, int pos) |
208 | { |
208 | { |
209 | u32 buf; |
209 | u32 buf; |
210 | pci_read_data(d, &buf, pos, 4); |
210 | pci_read_data(d, &buf, pos, 4); |
211 | return le32_to_cpu(buf); |
211 | return le32_to_cpu(buf); |
212 | } |
212 | } |
213 | 213 | ||
214 | int pci_read_block(struct pci_dev *d, int pos, byte * buf, int len) |
214 | int pci_read_block(struct pci_dev *d, int pos, byte * buf, int len) |
215 | { |
215 | { |
216 | return d->methods->read(d, pos, buf, len); |
216 | return d->methods->read(d, pos, buf, len); |
217 | } |
217 | } |
218 | 218 | ||
219 | static inline int |
219 | static inline int |
220 | pci_write_data(struct pci_dev *d, void *buf, int pos, int len) |
220 | pci_write_data(struct pci_dev *d, void *buf, int pos, int len) |
221 | { |
221 | { |
222 | if (pos & (len - 1)) |
222 | if (pos & (len - 1)) |
223 | d->access->error("Unaligned write: pos=%02x,len=%d", pos, len); |
223 | d->access->error("Unaligned write: pos=%02x,len=%d", pos, len); |
224 | if (pos + len <= d->cache_len) |
224 | if (pos + len <= d->cache_len) |
225 | memcpy(d->cache + pos, buf, len); |
225 | memcpy(d->cache + pos, buf, len); |
226 | return d->methods->write(d, pos, buf, len); |
226 | return d->methods->write(d, pos, buf, len); |
227 | } |
227 | } |
228 | 228 | ||
229 | int pci_write_byte(struct pci_dev *d, int pos, byte data) |
229 | int pci_write_byte(struct pci_dev *d, int pos, byte data) |
230 | { |
230 | { |
231 | return pci_write_data(d, &data, pos, 1); |
231 | return pci_write_data(d, &data, pos, 1); |
232 | } |
232 | } |
233 | 233 | ||
234 | int pci_write_word(struct pci_dev *d, int pos, word data) |
234 | int pci_write_word(struct pci_dev *d, int pos, word data) |
235 | { |
235 | { |
236 | word buf = cpu_to_le16(data); |
236 | word buf = cpu_to_le16(data); |
237 | return pci_write_data(d, &buf, pos, 2); |
237 | return pci_write_data(d, &buf, pos, 2); |
238 | } |
238 | } |
239 | 239 | ||
240 | int pci_write_long(struct pci_dev *d, int pos, u32 data) |
240 | int pci_write_long(struct pci_dev *d, int pos, u32 data) |
241 | { |
241 | { |
242 | u32 buf = cpu_to_le32(data); |
242 | u32 buf = cpu_to_le32(data); |
243 | return pci_write_data(d, &buf, pos, 4); |
243 | return pci_write_data(d, &buf, pos, 4); |
244 | } |
244 | } |
245 | 245 | ||
246 | int pci_write_block(struct pci_dev *d, int pos, byte * buf, int len) |
246 | int pci_write_block(struct pci_dev *d, int pos, byte * buf, int len) |
247 | { |
247 | { |
248 | if (pos < d->cache_len) { |
248 | if (pos < d->cache_len) { |
249 | int l = (pos + len >= d->cache_len) ? (d->cache_len - pos) : len; |
249 | int l = (pos + len >= d->cache_len) ? (d->cache_len - pos) : len; |
250 | memcpy(d->cache + pos, buf, l); |
250 | memcpy(d->cache + pos, buf, l); |
251 | } |
251 | } |
252 | return d->methods->write(d, pos, buf, len); |
252 | return d->methods->write(d, pos, buf, len); |
253 | } |
253 | } |
254 | 254 | ||
255 | int pci_fill_info(struct pci_dev *d, int flags) |
255 | int pci_fill_info(struct pci_dev *d, int flags) |
256 | { |
256 | { |
257 | if (flags & PCI_FILL_RESCAN) { |
257 | if (flags & PCI_FILL_RESCAN) { |
258 | flags &= ~PCI_FILL_RESCAN; |
258 | flags &= ~PCI_FILL_RESCAN; |
259 | d->known_fields = 0; |
259 | d->known_fields = 0; |
260 | } |
260 | } |
261 | if (flags & ~d->known_fields) |
261 | if (flags & ~d->known_fields) |
262 | d->known_fields |= d->methods->fill_info(d, flags & ~d->known_fields); |
262 | d->known_fields |= d->methods->fill_info(d, flags & ~d->known_fields); |
263 | return d->known_fields; |
263 | return d->known_fields; |
264 | } |
264 | } |
265 | 265 | ||
266 | void pci_setup_cache(struct pci_dev *d, byte * cache, int len) |
266 | void pci_setup_cache(struct pci_dev *d, byte * cache, int len) |
267 | { |
267 | { |
268 | d->cache = cache; |
268 | d->cache = cache; |
269 | d->cache_len = len; |
269 | d->cache_len = len; |
270 | } |
270 | } |
271 | 271 |