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10#include <linux/module.h>
11#include <linux/slab.h>
12#include <linux/fmc.h>
13#include <linux/sdb.h>
14#include <linux/err.h>
15#include <linux/fmc-sdb.h>
16#include <asm/byteorder.h>
17
18static uint32_t __sdb_rd(struct fmc_device *fmc, unsigned long address,
19 int convert)
20{
21 uint32_t res = fmc_readl(fmc, address);
22 if (convert)
23 return __be32_to_cpu(res);
24 return res;
25}
26
27static struct sdb_array *__fmc_scan_sdb_tree(struct fmc_device *fmc,
28 unsigned long sdb_addr,
29 unsigned long reg_base, int level)
30{
31 uint32_t onew;
32 int i, j, n, convert = 0;
33 struct sdb_array *arr, *sub;
34
35 onew = fmc_readl(fmc, sdb_addr);
36 if (onew == SDB_MAGIC) {
37
38 if (SDB_MAGIC != __be32_to_cpu(SDB_MAGIC))
39 convert = 1;
40 } else if (onew == __be32_to_cpu(SDB_MAGIC)) {
41
42 } else {
43 return ERR_PTR(-ENOENT);
44 }
45
46 onew = __sdb_rd(fmc, sdb_addr + 4, convert);
47 n = __be16_to_cpu(*(uint16_t *)&onew);
48 arr = kzalloc(sizeof(*arr), GFP_KERNEL);
49 if (!arr)
50 return ERR_PTR(-ENOMEM);
51 arr->record = kzalloc(sizeof(arr->record[0]) * n, GFP_KERNEL);
52 arr->subtree = kzalloc(sizeof(arr->subtree[0]) * n, GFP_KERNEL);
53 if (!arr->record || !arr->subtree) {
54 kfree(arr->record);
55 kfree(arr->subtree);
56 kfree(arr);
57 return ERR_PTR(-ENOMEM);
58 }
59
60 arr->len = n;
61 arr->level = level;
62 arr->fmc = fmc;
63 for (i = 0; i < n; i++) {
64 union sdb_record *r;
65
66 for (j = 0; j < sizeof(arr->record[0]); j += 4) {
67 *(uint32_t *)((void *)(arr->record + i) + j) =
68 __sdb_rd(fmc, sdb_addr + (i * 64) + j, convert);
69 }
70 r = &arr->record[i];
71 arr->subtree[i] = ERR_PTR(-ENODEV);
72 if (r->empty.record_type == sdb_type_bridge) {
73 struct sdb_component *c = &r->bridge.sdb_component;
74 uint64_t subaddr = __be64_to_cpu(r->bridge.sdb_child);
75 uint64_t newbase = __be64_to_cpu(c->addr_first);
76
77 subaddr += reg_base;
78 newbase += reg_base;
79 sub = __fmc_scan_sdb_tree(fmc, subaddr, newbase,
80 level + 1);
81 arr->subtree[i] = sub;
82 if (IS_ERR(sub))
83 continue;
84 sub->parent = arr;
85 sub->baseaddr = newbase;
86 }
87 }
88 return arr;
89}
90
91int fmc_scan_sdb_tree(struct fmc_device *fmc, unsigned long address)
92{
93 struct sdb_array *ret;
94 if (fmc->sdb)
95 return -EBUSY;
96 ret = __fmc_scan_sdb_tree(fmc, address, 0 , 0);
97 if (IS_ERR(ret))
98 return PTR_ERR(ret);
99 fmc->sdb = ret;
100 return 0;
101}
102EXPORT_SYMBOL(fmc_scan_sdb_tree);
103
104static void __fmc_sdb_free(struct sdb_array *arr)
105{
106 int i, n;
107
108 if (!arr)
109 return;
110 n = arr->len;
111 for (i = 0; i < n; i++) {
112 if (IS_ERR(arr->subtree[i]))
113 continue;
114 __fmc_sdb_free(arr->subtree[i]);
115 }
116 kfree(arr->record);
117 kfree(arr->subtree);
118 kfree(arr);
119}
120
121int fmc_free_sdb_tree(struct fmc_device *fmc)
122{
123 __fmc_sdb_free(fmc->sdb);
124 fmc->sdb = NULL;
125 return 0;
126}
127EXPORT_SYMBOL(fmc_free_sdb_tree);
128
129
130int fmc_reprogram(struct fmc_device *fmc, struct fmc_driver *d, char *gw,
131 int sdb_entry)
132{
133 int ret;
134
135 ret = fmc->op->reprogram(fmc, d, gw);
136 if (ret < 0)
137 return ret;
138 if (sdb_entry < 0)
139 return ret;
140
141
142 ret = fmc_scan_sdb_tree(fmc, sdb_entry);
143 if (ret < 0) {
144 dev_err(&fmc->dev, "Can't find SDB at address 0x%x\n",
145 sdb_entry);
146 return -ENODEV;
147 }
148 fmc_dump_sdb(fmc);
149 return 0;
150}
151EXPORT_SYMBOL(fmc_reprogram);
152
153static void __fmc_show_sdb_tree(const struct fmc_device *fmc,
154 const struct sdb_array *arr)
155{
156 int i, j, n = arr->len, level = arr->level;
157 const struct sdb_array *ap;
158
159 for (i = 0; i < n; i++) {
160 unsigned long base;
161 union sdb_record *r;
162 struct sdb_product *p;
163 struct sdb_component *c;
164 r = &arr->record[i];
165 c = &r->dev.sdb_component;
166 p = &c->product;
167 base = 0;
168 for (ap = arr; ap; ap = ap->parent)
169 base += ap->baseaddr;
170 dev_info(&fmc->dev, "SDB: ");
171
172 for (j = 0; j < level; j++)
173 printk(KERN_CONT " ");
174 switch (r->empty.record_type) {
175 case sdb_type_interconnect:
176 printk(KERN_CONT "%08llx:%08x %.19s\n",
177 __be64_to_cpu(p->vendor_id),
178 __be32_to_cpu(p->device_id),
179 p->name);
180 break;
181 case sdb_type_device:
182 printk(KERN_CONT "%08llx:%08x %.19s (%08llx-%08llx)\n",
183 __be64_to_cpu(p->vendor_id),
184 __be32_to_cpu(p->device_id),
185 p->name,
186 __be64_to_cpu(c->addr_first) + base,
187 __be64_to_cpu(c->addr_last) + base);
188 break;
189 case sdb_type_bridge:
190 printk(KERN_CONT "%08llx:%08x %.19s (bridge: %08llx)\n",
191 __be64_to_cpu(p->vendor_id),
192 __be32_to_cpu(p->device_id),
193 p->name,
194 __be64_to_cpu(c->addr_first) + base);
195 if (IS_ERR(arr->subtree[i])) {
196 printk(KERN_CONT "(bridge error %li)\n",
197 PTR_ERR(arr->subtree[i]));
198 break;
199 }
200 __fmc_show_sdb_tree(fmc, arr->subtree[i]);
201 break;
202 case sdb_type_integration:
203 printk(KERN_CONT "integration\n");
204 break;
205 case sdb_type_repo_url:
206 printk(KERN_CONT "repo-url\n");
207 break;
208 case sdb_type_synthesis:
209 printk(KERN_CONT "synthesis-info\n");
210 break;
211 case sdb_type_empty:
212 printk(KERN_CONT "empty\n");
213 break;
214 default:
215 printk(KERN_CONT "UNKNOWN TYPE 0x%02x\n",
216 r->empty.record_type);
217 break;
218 }
219 }
220}
221
222void fmc_show_sdb_tree(const struct fmc_device *fmc)
223{
224 if (!fmc->sdb)
225 return;
226 __fmc_show_sdb_tree(fmc, fmc->sdb);
227}
228EXPORT_SYMBOL(fmc_show_sdb_tree);
229
230signed long fmc_find_sdb_device(struct sdb_array *tree,
231 uint64_t vid, uint32_t did, unsigned long *sz)
232{
233 signed long res = -ENODEV;
234 union sdb_record *r;
235 struct sdb_product *p;
236 struct sdb_component *c;
237 int i, n = tree->len;
238 uint64_t last, first;
239
240
241 for (i = 0; i < n; i++) {
242 r = &tree->record[i];
243 c = &r->dev.sdb_component;
244 p = &c->product;
245
246 if (!IS_ERR(tree->subtree[i]))
247 res = fmc_find_sdb_device(tree->subtree[i],
248 vid, did, sz);
249 if (res >= 0)
250 return res + tree->baseaddr;
251 if (r->empty.record_type != sdb_type_device)
252 continue;
253 if (__be64_to_cpu(p->vendor_id) != vid)
254 continue;
255 if (__be32_to_cpu(p->device_id) != did)
256 continue;
257
258 last = __be64_to_cpu(c->addr_last);
259 first = __be64_to_cpu(c->addr_first);
260 if (sz)
261 *sz = (typeof(*sz))(last + 1 - first);
262 return first + tree->baseaddr;
263 }
264 return res;
265}
266EXPORT_SYMBOL(fmc_find_sdb_device);
267
