This source file includes following definitions.
- get_next_dtype
- chameleon_parse_bdd
- chameleon_parse_gdd
- chameleon_parse_bar
- chameleon_get_bar
- chameleon_parse_cells
1
2 #include <linux/types.h>
3 #include <linux/ioport.h>
4 #include <linux/slab.h>
5 #include <linux/export.h>
6 #include <linux/io.h>
7 #include <linux/mcb.h>
8
9 #include "mcb-internal.h"
10
11 struct mcb_parse_priv {
12 phys_addr_t mapbase;
13 void __iomem *base;
14 };
15
16 #define for_each_chameleon_cell(dtype, p) \
17 for ((dtype) = get_next_dtype((p)); \
18 (dtype) != CHAMELEON_DTYPE_END; \
19 (dtype) = get_next_dtype((p)))
20
21 static inline uint32_t get_next_dtype(void __iomem *p)
22 {
23 uint32_t dtype;
24
25 dtype = readl(p);
26 return dtype >> 28;
27 }
28
29 static int chameleon_parse_bdd(struct mcb_bus *bus,
30 struct chameleon_bar *cb,
31 void __iomem *base)
32 {
33 return 0;
34 }
35
36 static int chameleon_parse_gdd(struct mcb_bus *bus,
37 struct chameleon_bar *cb,
38 void __iomem *base, int bar_count)
39 {
40 struct chameleon_gdd __iomem *gdd =
41 (struct chameleon_gdd __iomem *) base;
42 struct mcb_device *mdev;
43 u32 dev_mapbase;
44 u32 offset;
45 u32 size;
46 int ret;
47 __le32 reg1;
48 __le32 reg2;
49
50 mdev = mcb_alloc_dev(bus);
51 if (!mdev)
52 return -ENOMEM;
53
54 reg1 = readl(&gdd->reg1);
55 reg2 = readl(&gdd->reg2);
56 offset = readl(&gdd->offset);
57 size = readl(&gdd->size);
58
59 mdev->id = GDD_DEV(reg1);
60 mdev->rev = GDD_REV(reg1);
61 mdev->var = GDD_VAR(reg1);
62 mdev->bar = GDD_BAR(reg2);
63 mdev->group = GDD_GRP(reg2);
64 mdev->inst = GDD_INS(reg2);
65
66
67
68
69
70
71 if (mdev->bar > bar_count - 1) {
72 pr_info("No BAR for 16z%03d\n", mdev->id);
73 ret = 0;
74 goto err;
75 }
76
77 dev_mapbase = cb[mdev->bar].addr;
78 if (!dev_mapbase) {
79 pr_info("BAR not assigned for 16z%03d\n", mdev->id);
80 ret = 0;
81 goto err;
82 }
83
84 if (dev_mapbase & 0x01) {
85 pr_info("IO mapped Device (16z%03d) not yet supported\n",
86 mdev->id);
87 ret = 0;
88 goto err;
89 }
90
91 pr_debug("Found a 16z%03d\n", mdev->id);
92
93 mdev->irq.start = GDD_IRQ(reg1);
94 mdev->irq.end = GDD_IRQ(reg1);
95 mdev->irq.flags = IORESOURCE_IRQ;
96
97 mdev->mem.start = dev_mapbase + offset;
98
99 mdev->mem.end = mdev->mem.start + size - 1;
100 mdev->mem.flags = IORESOURCE_MEM;
101
102 mdev->is_added = false;
103
104 ret = mcb_device_register(bus, mdev);
105 if (ret < 0)
106 goto err;
107
108 return 0;
109
110 err:
111 mcb_free_dev(mdev);
112
113 return ret;
114 }
115
116 static void chameleon_parse_bar(void __iomem *base,
117 struct chameleon_bar *cb, int bar_count)
118 {
119 char __iomem *p = base;
120 int i;
121
122
123 p += sizeof(__le32);
124
125 for (i = 0; i < bar_count; i++) {
126 cb[i].addr = readl(p);
127 cb[i].size = readl(p + 4);
128
129 p += sizeof(struct chameleon_bar);
130 }
131 }
132
133 static int chameleon_get_bar(char __iomem **base, phys_addr_t mapbase,
134 struct chameleon_bar **cb)
135 {
136 struct chameleon_bar *c;
137 int bar_count;
138 __le32 reg;
139 u32 dtype;
140
141
142
143
144
145
146
147
148 dtype = get_next_dtype(*base);
149 if (dtype == CHAMELEON_DTYPE_BAR) {
150 reg = readl(*base);
151
152 bar_count = BAR_CNT(reg);
153 if (bar_count <= 0 || bar_count > CHAMELEON_BAR_MAX)
154 return -ENODEV;
155
156 c = kcalloc(bar_count, sizeof(struct chameleon_bar),
157 GFP_KERNEL);
158 if (!c)
159 return -ENOMEM;
160
161 chameleon_parse_bar(*base, c, bar_count);
162 *base += BAR_DESC_SIZE(bar_count);
163 } else {
164 c = kzalloc(sizeof(struct chameleon_bar), GFP_KERNEL);
165 if (!c)
166 return -ENOMEM;
167
168 bar_count = 1;
169 c->addr = mapbase;
170 }
171
172 *cb = c;
173
174 return bar_count;
175 }
176
177 int chameleon_parse_cells(struct mcb_bus *bus, phys_addr_t mapbase,
178 void __iomem *base)
179 {
180 struct chameleon_fpga_header *header;
181 struct chameleon_bar *cb;
182 char __iomem *p = base;
183 int num_cells = 0;
184 uint32_t dtype;
185 int bar_count;
186 int ret;
187 u32 hsize;
188
189 hsize = sizeof(struct chameleon_fpga_header);
190
191 header = kzalloc(hsize, GFP_KERNEL);
192 if (!header)
193 return -ENOMEM;
194
195
196 memcpy_fromio(header, p, hsize);
197
198 header->magic = le16_to_cpu(header->magic);
199 if (header->magic != CHAMELEONV2_MAGIC) {
200 pr_err("Unsupported chameleon version 0x%x\n",
201 header->magic);
202 ret = -ENODEV;
203 goto free_header;
204 }
205 p += hsize;
206
207 bus->revision = header->revision;
208 bus->model = header->model;
209 bus->minor = header->minor;
210 snprintf(bus->name, CHAMELEON_FILENAME_LEN + 1, "%s",
211 header->filename);
212
213 bar_count = chameleon_get_bar(&p, mapbase, &cb);
214 if (bar_count < 0) {
215 ret = bar_count;
216 goto free_header;
217 }
218
219 for_each_chameleon_cell(dtype, p) {
220 switch (dtype) {
221 case CHAMELEON_DTYPE_GENERAL:
222 ret = chameleon_parse_gdd(bus, cb, p, bar_count);
223 if (ret < 0)
224 goto free_bar;
225 p += sizeof(struct chameleon_gdd);
226 break;
227 case CHAMELEON_DTYPE_BRIDGE:
228 chameleon_parse_bdd(bus, cb, p);
229 p += sizeof(struct chameleon_bdd);
230 break;
231 case CHAMELEON_DTYPE_END:
232 break;
233 default:
234 pr_err("Invalid chameleon descriptor type 0x%x\n",
235 dtype);
236 ret = -EINVAL;
237 goto free_bar;
238 }
239 num_cells++;
240 }
241
242 if (num_cells == 0)
243 num_cells = -EINVAL;
244
245 kfree(cb);
246 kfree(header);
247 return num_cells;
248
249 free_bar:
250 kfree(cb);
251 free_header:
252 kfree(header);
253
254 return ret;
255 }
256 EXPORT_SYMBOL_GPL(chameleon_parse_cells);