Commit | Line | Data |
---|---|---|
b28422e3 | 1 | /* chmc.c: Driver for UltraSPARC-III memory controller. |
1da177e4 | 2 | * |
b28422e3 | 3 | * Copyright (C) 2001, 2007, 2008 David S. Miller (davem@davemloft.net) |
1da177e4 LT |
4 | */ |
5 | ||
6 | #include <linux/module.h> | |
7 | #include <linux/kernel.h> | |
8 | #include <linux/types.h> | |
9 | #include <linux/slab.h> | |
10 | #include <linux/list.h> | |
11 | #include <linux/string.h> | |
12 | #include <linux/sched.h> | |
13 | #include <linux/smp.h> | |
14 | #include <linux/errno.h> | |
15 | #include <linux/init.h> | |
b28422e3 DM |
16 | #include <linux/of.h> |
17 | #include <linux/of_device.h> | |
1da177e4 LT |
18 | #include <asm/spitfire.h> |
19 | #include <asm/chmctrl.h> | |
b332b8bc | 20 | #include <asm/cpudata.h> |
1da177e4 | 21 | #include <asm/oplib.h> |
44bdef5e | 22 | #include <asm/prom.h> |
b28422e3 | 23 | #include <asm/head.h> |
1da177e4 | 24 | #include <asm/io.h> |
881d021a | 25 | #include <asm/memctrl.h> |
1da177e4 | 26 | |
b28422e3 DM |
27 | #define DRV_MODULE_NAME "chmc" |
28 | #define PFX DRV_MODULE_NAME ": " | |
29 | #define DRV_MODULE_VERSION "0.2" | |
30 | ||
31 | MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); | |
32 | MODULE_DESCRIPTION("UltraSPARC-III memory controller driver"); | |
33 | MODULE_LICENSE("GPL"); | |
34 | MODULE_VERSION(DRV_MODULE_VERSION); | |
35 | ||
85269eb5 DM |
36 | static int mc_type; |
37 | #define MC_TYPE_SAFARI 1 | |
38 | #define MC_TYPE_JBUS 2 | |
39 | ||
40 | static dimm_printer_t us3mc_dimm_printer; | |
41 | ||
1da177e4 LT |
42 | #define CHMCTRL_NDGRPS 2 |
43 | #define CHMCTRL_NDIMMS 4 | |
44 | ||
83ef64b9 | 45 | #define CHMC_DIMMS_PER_MC (CHMCTRL_NDGRPS * CHMCTRL_NDIMMS) |
1da177e4 LT |
46 | |
47 | /* OBP memory-layout property format. */ | |
83ef64b9 | 48 | struct chmc_obp_map { |
1da177e4 LT |
49 | unsigned char dimm_map[144]; |
50 | unsigned char pin_map[576]; | |
51 | }; | |
52 | ||
53 | #define DIMM_LABEL_SZ 8 | |
54 | ||
83ef64b9 | 55 | struct chmc_obp_mem_layout { |
1da177e4 LT |
56 | /* One max 8-byte string label per DIMM. Usually |
57 | * this matches the label on the motherboard where | |
58 | * that DIMM resides. | |
59 | */ | |
83ef64b9 | 60 | char dimm_labels[CHMC_DIMMS_PER_MC][DIMM_LABEL_SZ]; |
1da177e4 LT |
61 | |
62 | /* If symmetric use map[0], else it is | |
63 | * asymmetric and map[1] should be used. | |
64 | */ | |
83ef64b9 | 65 | char symmetric; |
1da177e4 | 66 | |
83ef64b9 | 67 | struct chmc_obp_map map[2]; |
1da177e4 LT |
68 | }; |
69 | ||
70 | #define CHMCTRL_NBANKS 4 | |
71 | ||
83ef64b9 DM |
72 | struct chmc_bank_info { |
73 | struct chmc *p; | |
1da177e4 LT |
74 | int bank_id; |
75 | ||
76 | u64 raw_reg; | |
77 | int valid; | |
78 | int uk; | |
79 | int um; | |
80 | int lk; | |
81 | int lm; | |
82 | int interleave; | |
83 | unsigned long base; | |
84 | unsigned long size; | |
85 | }; | |
86 | ||
83ef64b9 DM |
87 | struct chmc { |
88 | struct list_head list; | |
89 | int portid; | |
1da177e4 | 90 | |
83ef64b9 DM |
91 | struct chmc_obp_mem_layout layout_prop; |
92 | int layout_size; | |
1da177e4 | 93 | |
83ef64b9 | 94 | void __iomem *regs; |
1da177e4 | 95 | |
83ef64b9 DM |
96 | u64 timing_control1; |
97 | u64 timing_control2; | |
98 | u64 timing_control3; | |
99 | u64 timing_control4; | |
100 | u64 memaddr_control; | |
1da177e4 | 101 | |
83ef64b9 | 102 | struct chmc_bank_info logical_banks[CHMCTRL_NBANKS]; |
1da177e4 LT |
103 | }; |
104 | ||
85269eb5 DM |
105 | #define JBUSMC_REGS_SIZE 8 |
106 | ||
3ab5827e DM |
107 | #define JB_MC_REG1_DIMM2_BANK3 0x8000000000000000UL |
108 | #define JB_MC_REG1_DIMM1_BANK1 0x4000000000000000UL | |
109 | #define JB_MC_REG1_DIMM2_BANK2 0x2000000000000000UL | |
110 | #define JB_MC_REG1_DIMM1_BANK0 0x1000000000000000UL | |
111 | #define JB_MC_REG1_XOR 0x0000010000000000UL | |
112 | #define JB_MC_REG1_ADDR_GEN_2 0x000000e000000000UL | |
85269eb5 | 113 | #define JB_MC_REG1_ADDR_GEN_2_SHIFT 37 |
3ab5827e | 114 | #define JB_MC_REG1_ADDR_GEN_1 0x0000001c00000000UL |
85269eb5 | 115 | #define JB_MC_REG1_ADDR_GEN_1_SHIFT 34 |
3ab5827e | 116 | #define JB_MC_REG1_INTERLEAVE 0x0000000001800000UL |
85269eb5 | 117 | #define JB_MC_REG1_INTERLEAVE_SHIFT 23 |
3ab5827e | 118 | #define JB_MC_REG1_DIMM2_PTYPE 0x0000000000200000UL |
85269eb5 | 119 | #define JB_MC_REG1_DIMM2_PTYPE_SHIFT 21 |
3ab5827e | 120 | #define JB_MC_REG1_DIMM1_PTYPE 0x0000000000100000UL |
85269eb5 DM |
121 | #define JB_MC_REG1_DIMM1_PTYPE_SHIFT 20 |
122 | ||
123 | #define PART_TYPE_X8 0 | |
124 | #define PART_TYPE_X4 1 | |
125 | ||
126 | #define INTERLEAVE_NONE 0 | |
127 | #define INTERLEAVE_SAME 1 | |
128 | #define INTERLEAVE_INTERNAL 2 | |
129 | #define INTERLEAVE_BOTH 3 | |
130 | ||
131 | #define ADDR_GEN_128MB 0 | |
132 | #define ADDR_GEN_256MB 1 | |
133 | #define ADDR_GEN_512MB 2 | |
134 | #define ADDR_GEN_1GB 3 | |
135 | ||
136 | #define JB_NUM_DIMM_GROUPS 2 | |
137 | #define JB_NUM_DIMMS_PER_GROUP 2 | |
138 | #define JB_NUM_DIMMS (JB_NUM_DIMM_GROUPS * JB_NUM_DIMMS_PER_GROUP) | |
139 | ||
140 | struct jbusmc_obp_map { | |
141 | unsigned char dimm_map[18]; | |
142 | unsigned char pin_map[144]; | |
143 | }; | |
144 | ||
145 | struct jbusmc_obp_mem_layout { | |
146 | /* One max 8-byte string label per DIMM. Usually | |
147 | * this matches the label on the motherboard where | |
148 | * that DIMM resides. | |
149 | */ | |
150 | char dimm_labels[JB_NUM_DIMMS][DIMM_LABEL_SZ]; | |
151 | ||
152 | /* If symmetric use map[0], else it is | |
153 | * asymmetric and map[1] should be used. | |
154 | */ | |
155 | char symmetric; | |
156 | ||
157 | struct jbusmc_obp_map map; | |
158 | ||
159 | char _pad; | |
160 | }; | |
161 | ||
162 | struct jbusmc_dimm_group { | |
163 | struct jbusmc *controller; | |
164 | int index; | |
165 | u64 base_addr; | |
166 | u64 size; | |
167 | }; | |
168 | ||
169 | struct jbusmc { | |
170 | void __iomem *regs; | |
171 | u64 mc_reg_1; | |
172 | u32 portid; | |
173 | struct jbusmc_obp_mem_layout layout; | |
174 | int layout_len; | |
175 | int num_dimm_groups; | |
176 | struct jbusmc_dimm_group dimm_groups[JB_NUM_DIMM_GROUPS]; | |
177 | struct list_head list; | |
178 | }; | |
179 | ||
180 | static DEFINE_SPINLOCK(mctrl_list_lock); | |
1da177e4 LT |
181 | static LIST_HEAD(mctrl_list); |
182 | ||
85269eb5 DM |
183 | static void mc_list_add(struct list_head *list) |
184 | { | |
185 | spin_lock(&mctrl_list_lock); | |
186 | list_add(list, &mctrl_list); | |
187 | spin_unlock(&mctrl_list_lock); | |
188 | } | |
189 | ||
190 | static void mc_list_del(struct list_head *list) | |
191 | { | |
192 | spin_lock(&mctrl_list_lock); | |
193 | list_del_init(list); | |
194 | spin_unlock(&mctrl_list_lock); | |
195 | } | |
196 | ||
197 | #define SYNDROME_MIN -1 | |
198 | #define SYNDROME_MAX 144 | |
199 | ||
200 | /* Covert syndrome code into the way the bits are positioned | |
201 | * on the bus. | |
202 | */ | |
203 | static int syndrome_to_qword_code(int syndrome_code) | |
204 | { | |
205 | if (syndrome_code < 128) | |
206 | syndrome_code += 16; | |
207 | else if (syndrome_code < 128 + 9) | |
208 | syndrome_code -= (128 - 7); | |
209 | else if (syndrome_code < (128 + 9 + 3)) | |
210 | syndrome_code -= (128 + 9 - 4); | |
211 | else | |
212 | syndrome_code -= (128 + 9 + 3); | |
213 | return syndrome_code; | |
214 | } | |
215 | ||
216 | /* All this magic has to do with how a cache line comes over the wire | |
217 | * on Safari and JBUS. A 64-bit line comes over in 1 or more quadword | |
218 | * cycles, each of which transmit ECC/MTAG info as well as the actual | |
219 | * data. | |
220 | */ | |
221 | #define L2_LINE_SIZE 64 | |
222 | #define L2_LINE_ADDR_MSK (L2_LINE_SIZE - 1) | |
223 | #define QW_PER_LINE 4 | |
224 | #define QW_BYTES (L2_LINE_SIZE / QW_PER_LINE) | |
225 | #define QW_BITS 144 | |
226 | #define SAFARI_LAST_BIT (576 - 1) | |
227 | #define JBUS_LAST_BIT (144 - 1) | |
228 | ||
229 | static void get_pin_and_dimm_str(int syndrome_code, unsigned long paddr, | |
230 | int *pin_p, char **dimm_str_p, void *_prop, | |
231 | int base_dimm_offset) | |
232 | { | |
233 | int qword_code = syndrome_to_qword_code(syndrome_code); | |
234 | int cache_line_offset; | |
235 | int offset_inverse; | |
236 | int dimm_map_index; | |
237 | int map_val; | |
238 | ||
239 | if (mc_type == MC_TYPE_JBUS) { | |
240 | struct jbusmc_obp_mem_layout *p = _prop; | |
241 | ||
242 | /* JBUS */ | |
243 | cache_line_offset = qword_code; | |
244 | offset_inverse = (JBUS_LAST_BIT - cache_line_offset); | |
245 | dimm_map_index = offset_inverse / 8; | |
246 | map_val = p->map.dimm_map[dimm_map_index]; | |
247 | map_val = ((map_val >> ((7 - (offset_inverse & 7)))) & 1); | |
248 | *dimm_str_p = p->dimm_labels[base_dimm_offset + map_val]; | |
249 | *pin_p = p->map.pin_map[cache_line_offset]; | |
250 | } else { | |
251 | struct chmc_obp_mem_layout *p = _prop; | |
252 | struct chmc_obp_map *mp; | |
253 | int qword; | |
254 | ||
255 | /* Safari */ | |
256 | if (p->symmetric) | |
257 | mp = &p->map[0]; | |
258 | else | |
259 | mp = &p->map[1]; | |
260 | ||
261 | qword = (paddr & L2_LINE_ADDR_MSK) / QW_BYTES; | |
262 | cache_line_offset = ((3 - qword) * QW_BITS) + qword_code; | |
263 | offset_inverse = (SAFARI_LAST_BIT - cache_line_offset); | |
264 | dimm_map_index = offset_inverse >> 2; | |
265 | map_val = mp->dimm_map[dimm_map_index]; | |
266 | map_val = ((map_val >> ((3 - (offset_inverse & 3)) << 1)) & 0x3); | |
267 | *dimm_str_p = p->dimm_labels[base_dimm_offset + map_val]; | |
268 | *pin_p = mp->pin_map[cache_line_offset]; | |
269 | } | |
270 | } | |
271 | ||
272 | static struct jbusmc_dimm_group *jbusmc_find_dimm_group(unsigned long phys_addr) | |
273 | { | |
274 | struct jbusmc *p; | |
275 | ||
276 | list_for_each_entry(p, &mctrl_list, list) { | |
277 | int i; | |
278 | ||
279 | for (i = 0; i < p->num_dimm_groups; i++) { | |
280 | struct jbusmc_dimm_group *dp = &p->dimm_groups[i]; | |
281 | ||
282 | if (phys_addr < dp->base_addr || | |
283 | (dp->base_addr + dp->size) <= phys_addr) | |
284 | continue; | |
285 | ||
286 | return dp; | |
287 | } | |
288 | } | |
289 | return NULL; | |
290 | } | |
291 | ||
292 | static int jbusmc_print_dimm(int syndrome_code, | |
293 | unsigned long phys_addr, | |
294 | char *buf, int buflen) | |
295 | { | |
296 | struct jbusmc_obp_mem_layout *prop; | |
297 | struct jbusmc_dimm_group *dp; | |
298 | struct jbusmc *p; | |
299 | int first_dimm; | |
300 | ||
301 | dp = jbusmc_find_dimm_group(phys_addr); | |
302 | if (dp == NULL || | |
303 | syndrome_code < SYNDROME_MIN || | |
304 | syndrome_code > SYNDROME_MAX) { | |
305 | buf[0] = '?'; | |
306 | buf[1] = '?'; | |
307 | buf[2] = '?'; | |
308 | buf[3] = '\0'; | |
1b0e235c | 309 | return 0; |
85269eb5 DM |
310 | } |
311 | p = dp->controller; | |
312 | prop = &p->layout; | |
313 | ||
314 | first_dimm = dp->index * JB_NUM_DIMMS_PER_GROUP; | |
315 | ||
316 | if (syndrome_code != SYNDROME_MIN) { | |
317 | char *dimm_str; | |
318 | int pin; | |
319 | ||
320 | get_pin_and_dimm_str(syndrome_code, phys_addr, &pin, | |
321 | &dimm_str, prop, first_dimm); | |
322 | sprintf(buf, "%s, pin %3d", dimm_str, pin); | |
323 | } else { | |
324 | int dimm; | |
325 | ||
326 | /* Multi-bit error, we just dump out all the | |
327 | * dimm labels associated with this dimm group. | |
328 | */ | |
329 | for (dimm = 0; dimm < JB_NUM_DIMMS_PER_GROUP; dimm++) { | |
330 | sprintf(buf, "%s ", | |
331 | prop->dimm_labels[first_dimm + dimm]); | |
332 | buf += strlen(buf); | |
333 | } | |
334 | } | |
335 | ||
336 | return 0; | |
337 | } | |
338 | ||
339 | static u64 __devinit jbusmc_dimm_group_size(u64 base, | |
340 | const struct linux_prom64_registers *mem_regs, | |
341 | int num_mem_regs) | |
342 | { | |
343 | u64 max = base + (8UL * 1024 * 1024 * 1024); | |
344 | u64 max_seen = base; | |
345 | int i; | |
346 | ||
347 | for (i = 0; i < num_mem_regs; i++) { | |
348 | const struct linux_prom64_registers *ent; | |
349 | u64 this_base; | |
350 | u64 this_end; | |
351 | ||
352 | ent = &mem_regs[i]; | |
353 | this_base = ent->phys_addr; | |
354 | this_end = this_base + ent->reg_size; | |
355 | if (base < this_base || base >= this_end) | |
356 | continue; | |
357 | if (this_end > max) | |
358 | this_end = max; | |
359 | if (this_end > max_seen) | |
360 | max_seen = this_end; | |
361 | } | |
362 | ||
363 | return max_seen - base; | |
364 | } | |
365 | ||
366 | static void __devinit jbusmc_construct_one_dimm_group(struct jbusmc *p, | |
367 | unsigned long index, | |
368 | const struct linux_prom64_registers *mem_regs, | |
369 | int num_mem_regs) | |
370 | { | |
371 | struct jbusmc_dimm_group *dp = &p->dimm_groups[index]; | |
372 | ||
373 | dp->controller = p; | |
374 | dp->index = index; | |
375 | ||
376 | dp->base_addr = (p->portid * (64UL * 1024 * 1024 * 1024)); | |
377 | dp->base_addr += (index * (8UL * 1024 * 1024 * 1024)); | |
378 | dp->size = jbusmc_dimm_group_size(dp->base_addr, mem_regs, num_mem_regs); | |
379 | } | |
380 | ||
381 | static void __devinit jbusmc_construct_dimm_groups(struct jbusmc *p, | |
382 | const struct linux_prom64_registers *mem_regs, | |
383 | int num_mem_regs) | |
384 | { | |
385 | if (p->mc_reg_1 & JB_MC_REG1_DIMM1_BANK0) { | |
386 | jbusmc_construct_one_dimm_group(p, 0, mem_regs, num_mem_regs); | |
387 | p->num_dimm_groups++; | |
388 | } | |
389 | if (p->mc_reg_1 & JB_MC_REG1_DIMM2_BANK2) { | |
390 | jbusmc_construct_one_dimm_group(p, 1, mem_regs, num_mem_regs); | |
391 | p->num_dimm_groups++; | |
392 | } | |
393 | } | |
394 | ||
395 | static int __devinit jbusmc_probe(struct of_device *op, | |
396 | const struct of_device_id *match) | |
397 | { | |
398 | const struct linux_prom64_registers *mem_regs; | |
399 | struct device_node *mem_node; | |
400 | int err, len, num_mem_regs; | |
401 | struct jbusmc *p; | |
402 | const u32 *prop; | |
403 | const void *ml; | |
404 | ||
405 | err = -ENODEV; | |
406 | mem_node = of_find_node_by_path("/memory"); | |
407 | if (!mem_node) { | |
408 | printk(KERN_ERR PFX "Cannot find /memory node.\n"); | |
409 | goto out; | |
410 | } | |
411 | mem_regs = of_get_property(mem_node, "reg", &len); | |
412 | if (!mem_regs) { | |
413 | printk(KERN_ERR PFX "Cannot get reg property of /memory node.\n"); | |
414 | goto out; | |
415 | } | |
416 | num_mem_regs = len / sizeof(*mem_regs); | |
417 | ||
418 | err = -ENOMEM; | |
419 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
420 | if (!p) { | |
421 | printk(KERN_ERR PFX "Cannot allocate struct jbusmc.\n"); | |
422 | goto out; | |
423 | } | |
424 | ||
425 | INIT_LIST_HEAD(&p->list); | |
426 | ||
427 | err = -ENODEV; | |
428 | prop = of_get_property(op->node, "portid", &len); | |
429 | if (!prop || len != 4) { | |
430 | printk(KERN_ERR PFX "Cannot find portid.\n"); | |
431 | goto out_free; | |
432 | } | |
433 | ||
434 | p->portid = *prop; | |
435 | ||
436 | prop = of_get_property(op->node, "memory-control-register-1", &len); | |
437 | if (!prop || len != 8) { | |
438 | printk(KERN_ERR PFX "Cannot get memory control register 1.\n"); | |
439 | goto out_free; | |
440 | } | |
441 | ||
442 | p->mc_reg_1 = ((u64)prop[0] << 32) | (u64) prop[1]; | |
443 | ||
444 | err = -ENOMEM; | |
445 | p->regs = of_ioremap(&op->resource[0], 0, JBUSMC_REGS_SIZE, "jbusmc"); | |
446 | if (!p->regs) { | |
447 | printk(KERN_ERR PFX "Cannot map jbusmc regs.\n"); | |
448 | goto out_free; | |
449 | } | |
450 | ||
451 | err = -ENODEV; | |
452 | ml = of_get_property(op->node, "memory-layout", &p->layout_len); | |
453 | if (!ml) { | |
454 | printk(KERN_ERR PFX "Cannot get memory layout property.\n"); | |
455 | goto out_iounmap; | |
456 | } | |
457 | if (p->layout_len > sizeof(p->layout)) { | |
458 | printk(KERN_ERR PFX "Unexpected memory-layout size %d\n", | |
459 | p->layout_len); | |
460 | goto out_iounmap; | |
461 | } | |
462 | memcpy(&p->layout, ml, p->layout_len); | |
463 | ||
464 | jbusmc_construct_dimm_groups(p, mem_regs, num_mem_regs); | |
465 | ||
466 | mc_list_add(&p->list); | |
467 | ||
468 | printk(KERN_INFO PFX "UltraSPARC-IIIi memory controller at %s\n", | |
469 | op->node->full_name); | |
470 | ||
471 | dev_set_drvdata(&op->dev, p); | |
472 | ||
473 | err = 0; | |
474 | ||
475 | out: | |
476 | return err; | |
477 | ||
478 | out_iounmap: | |
479 | of_iounmap(&op->resource[0], p->regs, JBUSMC_REGS_SIZE); | |
480 | ||
481 | out_free: | |
482 | kfree(p); | |
483 | goto out; | |
484 | } | |
485 | ||
1da177e4 | 486 | /* Does BANK decode PHYS_ADDR? */ |
83ef64b9 | 487 | static int chmc_bank_match(struct chmc_bank_info *bp, unsigned long phys_addr) |
1da177e4 LT |
488 | { |
489 | unsigned long upper_bits = (phys_addr & PA_UPPER_BITS) >> PA_UPPER_BITS_SHIFT; | |
490 | unsigned long lower_bits = (phys_addr & PA_LOWER_BITS) >> PA_LOWER_BITS_SHIFT; | |
491 | ||
492 | /* Bank must be enabled to match. */ | |
493 | if (bp->valid == 0) | |
494 | return 0; | |
495 | ||
496 | /* Would BANK match upper bits? */ | |
497 | upper_bits ^= bp->um; /* What bits are different? */ | |
498 | upper_bits = ~upper_bits; /* Invert. */ | |
499 | upper_bits |= bp->uk; /* What bits don't matter for matching? */ | |
500 | upper_bits = ~upper_bits; /* Invert. */ | |
501 | ||
502 | if (upper_bits) | |
503 | return 0; | |
504 | ||
505 | /* Would BANK match lower bits? */ | |
506 | lower_bits ^= bp->lm; /* What bits are different? */ | |
507 | lower_bits = ~lower_bits; /* Invert. */ | |
508 | lower_bits |= bp->lk; /* What bits don't matter for matching? */ | |
509 | lower_bits = ~lower_bits; /* Invert. */ | |
510 | ||
511 | if (lower_bits) | |
512 | return 0; | |
513 | ||
514 | /* I always knew you'd be the one. */ | |
515 | return 1; | |
516 | } | |
517 | ||
518 | /* Given PHYS_ADDR, search memory controller banks for a match. */ | |
83ef64b9 | 519 | static struct chmc_bank_info *chmc_find_bank(unsigned long phys_addr) |
1da177e4 | 520 | { |
85269eb5 | 521 | struct chmc *p; |
1da177e4 | 522 | |
85269eb5 | 523 | list_for_each_entry(p, &mctrl_list, list) { |
1da177e4 LT |
524 | int bank_no; |
525 | ||
1da177e4 | 526 | for (bank_no = 0; bank_no < CHMCTRL_NBANKS; bank_no++) { |
83ef64b9 | 527 | struct chmc_bank_info *bp; |
1da177e4 | 528 | |
83ef64b9 DM |
529 | bp = &p->logical_banks[bank_no]; |
530 | if (chmc_bank_match(bp, phys_addr)) | |
1da177e4 LT |
531 | return bp; |
532 | } | |
533 | } | |
534 | ||
535 | return NULL; | |
536 | } | |
537 | ||
538 | /* This is the main purpose of this driver. */ | |
881d021a DM |
539 | static int chmc_print_dimm(int syndrome_code, |
540 | unsigned long phys_addr, | |
541 | char *buf, int buflen) | |
1da177e4 | 542 | { |
83ef64b9 DM |
543 | struct chmc_bank_info *bp; |
544 | struct chmc_obp_mem_layout *prop; | |
1da177e4 LT |
545 | int bank_in_controller, first_dimm; |
546 | ||
83ef64b9 | 547 | bp = chmc_find_bank(phys_addr); |
1da177e4 LT |
548 | if (bp == NULL || |
549 | syndrome_code < SYNDROME_MIN || | |
550 | syndrome_code > SYNDROME_MAX) { | |
551 | buf[0] = '?'; | |
552 | buf[1] = '?'; | |
553 | buf[2] = '?'; | |
554 | buf[3] = '\0'; | |
555 | return 0; | |
556 | } | |
557 | ||
83ef64b9 | 558 | prop = &bp->p->layout_prop; |
1da177e4 LT |
559 | bank_in_controller = bp->bank_id & (CHMCTRL_NBANKS - 1); |
560 | first_dimm = (bank_in_controller & (CHMCTRL_NDGRPS - 1)); | |
561 | first_dimm *= CHMCTRL_NDIMMS; | |
562 | ||
563 | if (syndrome_code != SYNDROME_MIN) { | |
85269eb5 DM |
564 | char *dimm_str; |
565 | int pin; | |
1da177e4 | 566 | |
85269eb5 DM |
567 | get_pin_and_dimm_str(syndrome_code, phys_addr, &pin, |
568 | &dimm_str, prop, first_dimm); | |
569 | sprintf(buf, "%s, pin %3d", dimm_str, pin); | |
1da177e4 LT |
570 | } else { |
571 | int dimm; | |
572 | ||
573 | /* Multi-bit error, we just dump out all the | |
574 | * dimm labels associated with this bank. | |
575 | */ | |
576 | for (dimm = 0; dimm < CHMCTRL_NDIMMS; dimm++) { | |
577 | sprintf(buf, "%s ", | |
578 | prop->dimm_labels[first_dimm + dimm]); | |
579 | buf += strlen(buf); | |
580 | } | |
581 | } | |
582 | return 0; | |
583 | } | |
584 | ||
585 | /* Accessing the registers is slightly complicated. If you want | |
586 | * to get at the memory controller which is on the same processor | |
587 | * the code is executing, you must use special ASI load/store else | |
588 | * you go through the global mapping. | |
589 | */ | |
83ef64b9 | 590 | static u64 chmc_read_mcreg(struct chmc *p, unsigned long offset) |
1da177e4 | 591 | { |
b332b8bc DM |
592 | unsigned long ret, this_cpu; |
593 | ||
594 | preempt_disable(); | |
595 | ||
596 | this_cpu = real_hard_smp_processor_id(); | |
1da177e4 | 597 | |
83ef64b9 | 598 | if (p->portid == this_cpu) { |
1da177e4 LT |
599 | __asm__ __volatile__("ldxa [%1] %2, %0" |
600 | : "=r" (ret) | |
601 | : "r" (offset), "i" (ASI_MCU_CTRL_REG)); | |
602 | } else { | |
603 | __asm__ __volatile__("ldxa [%1] %2, %0" | |
604 | : "=r" (ret) | |
83ef64b9 | 605 | : "r" (p->regs + offset), |
1da177e4 LT |
606 | "i" (ASI_PHYS_BYPASS_EC_E)); |
607 | } | |
b332b8bc DM |
608 | |
609 | preempt_enable(); | |
1da177e4 LT |
610 | |
611 | return ret; | |
612 | } | |
613 | ||
614 | #if 0 /* currently unused */ | |
83ef64b9 | 615 | static void chmc_write_mcreg(struct chmc *p, unsigned long offset, u64 val) |
1da177e4 | 616 | { |
83ef64b9 | 617 | if (p->portid == smp_processor_id()) { |
1da177e4 LT |
618 | __asm__ __volatile__("stxa %0, [%1] %2" |
619 | : : "r" (val), | |
620 | "r" (offset), "i" (ASI_MCU_CTRL_REG)); | |
621 | } else { | |
622 | __asm__ __volatile__("ldxa %0, [%1] %2" | |
623 | : : "r" (val), | |
83ef64b9 | 624 | "r" (p->regs + offset), |
1da177e4 LT |
625 | "i" (ASI_PHYS_BYPASS_EC_E)); |
626 | } | |
627 | } | |
628 | #endif | |
629 | ||
83ef64b9 | 630 | static void chmc_interpret_one_decode_reg(struct chmc *p, int which_bank, u64 val) |
1da177e4 | 631 | { |
83ef64b9 DM |
632 | struct chmc_bank_info *bp = &p->logical_banks[which_bank]; |
633 | ||
634 | bp->p = p; | |
635 | bp->bank_id = (CHMCTRL_NBANKS * p->portid) + which_bank; | |
636 | bp->raw_reg = val; | |
637 | bp->valid = (val & MEM_DECODE_VALID) >> MEM_DECODE_VALID_SHIFT; | |
638 | bp->uk = (val & MEM_DECODE_UK) >> MEM_DECODE_UK_SHIFT; | |
639 | bp->um = (val & MEM_DECODE_UM) >> MEM_DECODE_UM_SHIFT; | |
640 | bp->lk = (val & MEM_DECODE_LK) >> MEM_DECODE_LK_SHIFT; | |
641 | bp->lm = (val & MEM_DECODE_LM) >> MEM_DECODE_LM_SHIFT; | |
642 | ||
643 | bp->base = (bp->um); | |
644 | bp->base &= ~(bp->uk); | |
645 | bp->base <<= PA_UPPER_BITS_SHIFT; | |
646 | ||
647 | switch(bp->lk) { | |
1da177e4 LT |
648 | case 0xf: |
649 | default: | |
83ef64b9 | 650 | bp->interleave = 1; |
1da177e4 LT |
651 | break; |
652 | ||
653 | case 0xe: | |
83ef64b9 | 654 | bp->interleave = 2; |
1da177e4 LT |
655 | break; |
656 | ||
657 | case 0xc: | |
83ef64b9 | 658 | bp->interleave = 4; |
1da177e4 LT |
659 | break; |
660 | ||
661 | case 0x8: | |
83ef64b9 | 662 | bp->interleave = 8; |
1da177e4 LT |
663 | break; |
664 | ||
665 | case 0x0: | |
83ef64b9 | 666 | bp->interleave = 16; |
1da177e4 LT |
667 | break; |
668 | }; | |
669 | ||
670 | /* UK[10] is reserved, and UK[11] is not set for the SDRAM | |
671 | * bank size definition. | |
672 | */ | |
83ef64b9 DM |
673 | bp->size = (((unsigned long)bp->uk & |
674 | ((1UL << 10UL) - 1UL)) + 1UL) << PA_UPPER_BITS_SHIFT; | |
675 | bp->size /= bp->interleave; | |
1da177e4 LT |
676 | } |
677 | ||
83ef64b9 | 678 | static void chmc_fetch_decode_regs(struct chmc *p) |
1da177e4 | 679 | { |
83ef64b9 | 680 | if (p->layout_size == 0) |
1da177e4 LT |
681 | return; |
682 | ||
83ef64b9 DM |
683 | chmc_interpret_one_decode_reg(p, 0, |
684 | chmc_read_mcreg(p, CHMCTRL_DECODE1)); | |
685 | chmc_interpret_one_decode_reg(p, 1, | |
686 | chmc_read_mcreg(p, CHMCTRL_DECODE2)); | |
687 | chmc_interpret_one_decode_reg(p, 2, | |
688 | chmc_read_mcreg(p, CHMCTRL_DECODE3)); | |
689 | chmc_interpret_one_decode_reg(p, 3, | |
690 | chmc_read_mcreg(p, CHMCTRL_DECODE4)); | |
1da177e4 LT |
691 | } |
692 | ||
b28422e3 DM |
693 | static int __devinit chmc_probe(struct of_device *op, |
694 | const struct of_device_id *match) | |
1da177e4 | 695 | { |
b28422e3 | 696 | struct device_node *dp = op->node; |
b28422e3 | 697 | unsigned long ver; |
6a23acf3 | 698 | const void *pval; |
b28422e3 | 699 | int len, portid; |
83ef64b9 DM |
700 | struct chmc *p; |
701 | int err; | |
b28422e3 | 702 | |
83ef64b9 | 703 | err = -ENODEV; |
b28422e3 DM |
704 | __asm__ ("rdpr %%ver, %0" : "=r" (ver)); |
705 | if ((ver >> 32UL) == __JALAPENO_ID || | |
706 | (ver >> 32UL) == __SERRANO_ID) | |
83ef64b9 | 707 | goto out; |
b28422e3 DM |
708 | |
709 | portid = of_getintprop_default(dp, "portid", -1); | |
1da177e4 | 710 | if (portid == -1) |
83ef64b9 | 711 | goto out; |
1da177e4 | 712 | |
44bdef5e | 713 | pval = of_get_property(dp, "memory-layout", &len); |
83ef64b9 DM |
714 | if (pval && len > sizeof(p->layout_prop)) { |
715 | printk(KERN_ERR PFX "Unexpected memory-layout property " | |
716 | "size %d.\n", len); | |
717 | goto out; | |
718 | } | |
719 | ||
720 | err = -ENOMEM; | |
721 | p = kzalloc(sizeof(*p), GFP_KERNEL); | |
722 | if (!p) { | |
723 | printk(KERN_ERR PFX "Could not allocate struct chmc.\n"); | |
724 | goto out; | |
44bdef5e | 725 | } |
1da177e4 | 726 | |
83ef64b9 DM |
727 | p->portid = portid; |
728 | p->layout_size = len; | |
729 | if (!pval) | |
730 | p->layout_size = 0; | |
731 | else | |
732 | memcpy(&p->layout_prop, pval, len); | |
733 | ||
734 | p->regs = of_ioremap(&op->resource[0], 0, 0x48, "chmc"); | |
735 | if (!p->regs) { | |
b28422e3 | 736 | printk(KERN_ERR PFX "Could not map registers.\n"); |
83ef64b9 | 737 | goto out_free; |
b28422e3 | 738 | } |
1da177e4 | 739 | |
83ef64b9 DM |
740 | if (p->layout_size != 0UL) { |
741 | p->timing_control1 = chmc_read_mcreg(p, CHMCTRL_TCTRL1); | |
742 | p->timing_control2 = chmc_read_mcreg(p, CHMCTRL_TCTRL2); | |
743 | p->timing_control3 = chmc_read_mcreg(p, CHMCTRL_TCTRL3); | |
744 | p->timing_control4 = chmc_read_mcreg(p, CHMCTRL_TCTRL4); | |
745 | p->memaddr_control = chmc_read_mcreg(p, CHMCTRL_MACTRL); | |
1da177e4 LT |
746 | } |
747 | ||
83ef64b9 | 748 | chmc_fetch_decode_regs(p); |
1da177e4 | 749 | |
85269eb5 | 750 | mc_list_add(&p->list); |
1da177e4 | 751 | |
b28422e3 | 752 | printk(KERN_INFO PFX "UltraSPARC-III memory controller at %s [%s]\n", |
44bdef5e | 753 | dp->full_name, |
83ef64b9 | 754 | (p->layout_size ? "ACTIVE" : "INACTIVE")); |
b28422e3 | 755 | |
83ef64b9 | 756 | dev_set_drvdata(&op->dev, p); |
1da177e4 | 757 | |
83ef64b9 | 758 | err = 0; |
1da177e4 | 759 | |
83ef64b9 DM |
760 | out: |
761 | return err; | |
762 | ||
763 | out_free: | |
764 | kfree(p); | |
765 | goto out; | |
1da177e4 LT |
766 | } |
767 | ||
85269eb5 DM |
768 | static int __devinit us3mc_probe(struct of_device *op, |
769 | const struct of_device_id *match) | |
770 | { | |
771 | if (mc_type == MC_TYPE_SAFARI) | |
772 | return chmc_probe(op, match); | |
773 | else if (mc_type == MC_TYPE_JBUS) | |
774 | return jbusmc_probe(op, match); | |
775 | return -ENODEV; | |
776 | } | |
777 | ||
778 | static void __devexit chmc_destroy(struct of_device *op, struct chmc *p) | |
779 | { | |
780 | list_del(&p->list); | |
781 | of_iounmap(&op->resource[0], p->regs, 0x48); | |
782 | kfree(p); | |
783 | } | |
784 | ||
785 | static void __devexit jbusmc_destroy(struct of_device *op, struct jbusmc *p) | |
1da177e4 | 786 | { |
85269eb5 DM |
787 | mc_list_del(&p->list); |
788 | of_iounmap(&op->resource[0], p->regs, JBUSMC_REGS_SIZE); | |
789 | kfree(p); | |
790 | } | |
791 | ||
792 | static int __devexit us3mc_remove(struct of_device *op) | |
793 | { | |
794 | void *p = dev_get_drvdata(&op->dev); | |
1da177e4 | 795 | |
83ef64b9 | 796 | if (p) { |
85269eb5 DM |
797 | if (mc_type == MC_TYPE_SAFARI) |
798 | chmc_destroy(op, p); | |
799 | else if (mc_type == MC_TYPE_JBUS) | |
800 | jbusmc_destroy(op, p); | |
b28422e3 DM |
801 | } |
802 | return 0; | |
803 | } | |
1da177e4 | 804 | |
fd098316 | 805 | static const struct of_device_id us3mc_match[] = { |
b28422e3 DM |
806 | { |
807 | .name = "memory-controller", | |
808 | }, | |
809 | {}, | |
810 | }; | |
85269eb5 | 811 | MODULE_DEVICE_TABLE(of, us3mc_match); |
44bdef5e | 812 | |
85269eb5 DM |
813 | static struct of_platform_driver us3mc_driver = { |
814 | .name = "us3mc", | |
815 | .match_table = us3mc_match, | |
816 | .probe = us3mc_probe, | |
817 | .remove = __devexit_p(us3mc_remove), | |
b28422e3 | 818 | }; |
1da177e4 | 819 | |
85269eb5 | 820 | static inline bool us3mc_platform(void) |
b28422e3 DM |
821 | { |
822 | if (tlb_type == cheetah || tlb_type == cheetah_plus) | |
823 | return true; | |
824 | return false; | |
1da177e4 LT |
825 | } |
826 | ||
85269eb5 | 827 | static int __init us3mc_init(void) |
1da177e4 | 828 | { |
85269eb5 | 829 | unsigned long ver; |
881d021a DM |
830 | int ret; |
831 | ||
85269eb5 | 832 | if (!us3mc_platform()) |
b28422e3 | 833 | return -ENODEV; |
1da177e4 | 834 | |
615c9136 | 835 | __asm__ __volatile__("rdpr %%ver, %0" : "=r" (ver)); |
85269eb5 DM |
836 | if ((ver >> 32UL) == __JALAPENO_ID || |
837 | (ver >> 32UL) == __SERRANO_ID) { | |
838 | mc_type = MC_TYPE_JBUS; | |
839 | us3mc_dimm_printer = jbusmc_print_dimm; | |
840 | } else { | |
841 | mc_type = MC_TYPE_SAFARI; | |
842 | us3mc_dimm_printer = chmc_print_dimm; | |
843 | } | |
844 | ||
845 | ret = register_dimm_printer(us3mc_dimm_printer); | |
846 | ||
881d021a | 847 | if (!ret) { |
85269eb5 | 848 | ret = of_register_driver(&us3mc_driver, &of_bus_type); |
881d021a | 849 | if (ret) |
85269eb5 | 850 | unregister_dimm_printer(us3mc_dimm_printer); |
881d021a DM |
851 | } |
852 | return ret; | |
b28422e3 | 853 | } |
1da177e4 | 854 | |
85269eb5 | 855 | static void __exit us3mc_cleanup(void) |
b28422e3 | 856 | { |
85269eb5 DM |
857 | if (us3mc_platform()) { |
858 | unregister_dimm_printer(us3mc_dimm_printer); | |
859 | of_unregister_driver(&us3mc_driver); | |
881d021a | 860 | } |
1da177e4 LT |
861 | } |
862 | ||
85269eb5 DM |
863 | module_init(us3mc_init); |
864 | module_exit(us3mc_cleanup); |