1 | // SPDX-License-Identifier: GPL-2.0 |
2 | /* pci_schizo.c: SCHIZO/TOMATILLO specific PCI controller support. |
3 | * |
4 | * Copyright (C) 2001, 2002, 2003, 2007, 2008 David S. Miller (davem@davemloft.net) |
5 | */ |
6 | |
7 | #include <linux/kernel.h> |
8 | #include <linux/types.h> |
9 | #include <linux/pci.h> |
10 | #include <linux/init.h> |
11 | #include <linux/slab.h> |
12 | #include <linux/export.h> |
13 | #include <linux/interrupt.h> |
14 | #include <linux/of.h> |
15 | #include <linux/of_platform.h> |
16 | #include <linux/platform_device.h> |
17 | #include <linux/property.h> |
18 | #include <linux/numa.h> |
19 | |
20 | #include <asm/iommu.h> |
21 | #include <asm/irq.h> |
22 | #include <asm/pstate.h> |
23 | #include <asm/prom.h> |
24 | #include <asm/upa.h> |
25 | |
26 | #include "pci_impl.h" |
27 | #include "iommu_common.h" |
28 | |
29 | #define DRIVER_NAME "schizo" |
30 | #define PFX DRIVER_NAME ": " |
31 | |
32 | /* This is a convention that at least Excalibur and Merlin |
33 | * follow. I suppose the SCHIZO used in Starcat and friends |
34 | * will do similar. |
35 | * |
36 | * The only way I could see this changing is if the newlink |
37 | * block requires more space in Schizo's address space than |
38 | * they predicted, thus requiring an address space reorg when |
39 | * the newer Schizo is taped out. |
40 | */ |
41 | |
42 | /* Streaming buffer control register. */ |
43 | #define SCHIZO_STRBUF_CTRL_LPTR 0x00000000000000f0UL /* LRU Lock Pointer */ |
44 | #define SCHIZO_STRBUF_CTRL_LENAB 0x0000000000000008UL /* LRU Lock Enable */ |
45 | #define SCHIZO_STRBUF_CTRL_RRDIS 0x0000000000000004UL /* Rerun Disable */ |
46 | #define SCHIZO_STRBUF_CTRL_DENAB 0x0000000000000002UL /* Diagnostic Mode Enable */ |
47 | #define SCHIZO_STRBUF_CTRL_ENAB 0x0000000000000001UL /* Streaming Buffer Enable */ |
48 | |
49 | /* IOMMU control register. */ |
50 | #define SCHIZO_IOMMU_CTRL_RESV 0xfffffffff9000000UL /* Reserved */ |
51 | #define SCHIZO_IOMMU_CTRL_XLTESTAT 0x0000000006000000UL /* Translation Error Status */ |
52 | #define SCHIZO_IOMMU_CTRL_XLTEERR 0x0000000001000000UL /* Translation Error encountered */ |
53 | #define SCHIZO_IOMMU_CTRL_LCKEN 0x0000000000800000UL /* Enable translation locking */ |
54 | #define SCHIZO_IOMMU_CTRL_LCKPTR 0x0000000000780000UL /* Translation lock pointer */ |
55 | #define SCHIZO_IOMMU_CTRL_TSBSZ 0x0000000000070000UL /* TSB Size */ |
56 | #define SCHIZO_IOMMU_TSBSZ_1K 0x0000000000000000UL /* TSB Table 1024 8-byte entries */ |
57 | #define SCHIZO_IOMMU_TSBSZ_2K 0x0000000000010000UL /* TSB Table 2048 8-byte entries */ |
58 | #define SCHIZO_IOMMU_TSBSZ_4K 0x0000000000020000UL /* TSB Table 4096 8-byte entries */ |
59 | #define SCHIZO_IOMMU_TSBSZ_8K 0x0000000000030000UL /* TSB Table 8192 8-byte entries */ |
60 | #define SCHIZO_IOMMU_TSBSZ_16K 0x0000000000040000UL /* TSB Table 16k 8-byte entries */ |
61 | #define SCHIZO_IOMMU_TSBSZ_32K 0x0000000000050000UL /* TSB Table 32k 8-byte entries */ |
62 | #define SCHIZO_IOMMU_TSBSZ_64K 0x0000000000060000UL /* TSB Table 64k 8-byte entries */ |
63 | #define SCHIZO_IOMMU_TSBSZ_128K 0x0000000000070000UL /* TSB Table 128k 8-byte entries */ |
64 | #define SCHIZO_IOMMU_CTRL_RESV2 0x000000000000fff8UL /* Reserved */ |
65 | #define SCHIZO_IOMMU_CTRL_TBWSZ 0x0000000000000004UL /* Assumed page size, 0=8k 1=64k */ |
66 | #define SCHIZO_IOMMU_CTRL_DENAB 0x0000000000000002UL /* Diagnostic mode enable */ |
67 | #define SCHIZO_IOMMU_CTRL_ENAB 0x0000000000000001UL /* IOMMU Enable */ |
68 | |
69 | /* Schizo config space address format is nearly identical to |
70 | * that of PSYCHO: |
71 | * |
72 | * 32 24 23 16 15 11 10 8 7 2 1 0 |
73 | * --------------------------------------------------------- |
74 | * |0 0 0 0 0 0 0 0 0| bus | device | function | reg | 0 0 | |
75 | * --------------------------------------------------------- |
76 | */ |
77 | #define SCHIZO_CONFIG_BASE(PBM) ((PBM)->config_space) |
78 | #define SCHIZO_CONFIG_ENCODE(BUS, DEVFN, REG) \ |
79 | (((unsigned long)(BUS) << 16) | \ |
80 | ((unsigned long)(DEVFN) << 8) | \ |
81 | ((unsigned long)(REG))) |
82 | |
83 | static void *schizo_pci_config_mkaddr(struct pci_pbm_info *pbm, |
84 | unsigned char bus, |
85 | unsigned int devfn, |
86 | int where) |
87 | { |
88 | if (!pbm) |
89 | return NULL; |
90 | bus -= pbm->pci_first_busno; |
91 | return (void *) |
92 | (SCHIZO_CONFIG_BASE(pbm) | |
93 | SCHIZO_CONFIG_ENCODE(bus, devfn, where)); |
94 | } |
95 | |
96 | /* SCHIZO error handling support. */ |
97 | enum schizo_error_type { |
98 | UE_ERR, CE_ERR, PCI_ERR, SAFARI_ERR |
99 | }; |
100 | |
101 | static DEFINE_SPINLOCK(stc_buf_lock); |
102 | static unsigned long stc_error_buf[128]; |
103 | static unsigned long stc_tag_buf[16]; |
104 | static unsigned long stc_line_buf[16]; |
105 | |
106 | #define SCHIZO_UE_INO 0x30 /* Uncorrectable ECC error */ |
107 | #define SCHIZO_CE_INO 0x31 /* Correctable ECC error */ |
108 | #define SCHIZO_PCIERR_A_INO 0x32 /* PBM A PCI bus error */ |
109 | #define SCHIZO_PCIERR_B_INO 0x33 /* PBM B PCI bus error */ |
110 | #define SCHIZO_SERR_INO 0x34 /* Safari interface error */ |
111 | |
112 | #define SCHIZO_STC_ERR 0xb800UL /* --> 0xba00 */ |
113 | #define SCHIZO_STC_TAG 0xba00UL /* --> 0xba80 */ |
114 | #define SCHIZO_STC_LINE 0xbb00UL /* --> 0xbb80 */ |
115 | |
116 | #define SCHIZO_STCERR_WRITE 0x2UL |
117 | #define SCHIZO_STCERR_READ 0x1UL |
118 | |
119 | #define SCHIZO_STCTAG_PPN 0x3fffffff00000000UL |
120 | #define SCHIZO_STCTAG_VPN 0x00000000ffffe000UL |
121 | #define SCHIZO_STCTAG_VALID 0x8000000000000000UL |
122 | #define SCHIZO_STCTAG_READ 0x4000000000000000UL |
123 | |
124 | #define SCHIZO_STCLINE_LINDX 0x0000000007800000UL |
125 | #define SCHIZO_STCLINE_SPTR 0x000000000007e000UL |
126 | #define SCHIZO_STCLINE_LADDR 0x0000000000001fc0UL |
127 | #define SCHIZO_STCLINE_EPTR 0x000000000000003fUL |
128 | #define SCHIZO_STCLINE_VALID 0x0000000000600000UL |
129 | #define SCHIZO_STCLINE_FOFN 0x0000000000180000UL |
130 | |
131 | static void __schizo_check_stc_error_pbm(struct pci_pbm_info *pbm, |
132 | enum schizo_error_type type) |
133 | { |
134 | struct strbuf *strbuf = &pbm->stc; |
135 | unsigned long regbase = pbm->pbm_regs; |
136 | unsigned long err_base, tag_base, line_base; |
137 | u64 control; |
138 | int i; |
139 | |
140 | err_base = regbase + SCHIZO_STC_ERR; |
141 | tag_base = regbase + SCHIZO_STC_TAG; |
142 | line_base = regbase + SCHIZO_STC_LINE; |
143 | |
144 | spin_lock(lock: &stc_buf_lock); |
145 | |
146 | /* This is __REALLY__ dangerous. When we put the |
147 | * streaming buffer into diagnostic mode to probe |
148 | * its tags and error status, we _must_ clear all |
149 | * of the line tag valid bits before re-enabling |
150 | * the streaming buffer. If any dirty data lives |
151 | * in the STC when we do this, we will end up |
152 | * invalidating it before it has a chance to reach |
153 | * main memory. |
154 | */ |
155 | control = upa_readq(strbuf->strbuf_control); |
156 | upa_writeq((control | SCHIZO_STRBUF_CTRL_DENAB), |
157 | strbuf->strbuf_control); |
158 | for (i = 0; i < 128; i++) { |
159 | unsigned long val; |
160 | |
161 | val = upa_readq(err_base + (i * 8UL)); |
162 | upa_writeq(0UL, err_base + (i * 8UL)); |
163 | stc_error_buf[i] = val; |
164 | } |
165 | for (i = 0; i < 16; i++) { |
166 | stc_tag_buf[i] = upa_readq(tag_base + (i * 8UL)); |
167 | stc_line_buf[i] = upa_readq(line_base + (i * 8UL)); |
168 | upa_writeq(0UL, tag_base + (i * 8UL)); |
169 | upa_writeq(0UL, line_base + (i * 8UL)); |
170 | } |
171 | |
172 | /* OK, state is logged, exit diagnostic mode. */ |
173 | upa_writeq(control, strbuf->strbuf_control); |
174 | |
175 | for (i = 0; i < 16; i++) { |
176 | int j, saw_error, first, last; |
177 | |
178 | saw_error = 0; |
179 | first = i * 8; |
180 | last = first + 8; |
181 | for (j = first; j < last; j++) { |
182 | unsigned long errval = stc_error_buf[j]; |
183 | if (errval != 0) { |
184 | saw_error++; |
185 | printk("%s: STC_ERR(%d)[wr(%d)rd(%d)]\n" , |
186 | pbm->name, |
187 | j, |
188 | (errval & SCHIZO_STCERR_WRITE) ? 1 : 0, |
189 | (errval & SCHIZO_STCERR_READ) ? 1 : 0); |
190 | } |
191 | } |
192 | if (saw_error != 0) { |
193 | unsigned long tagval = stc_tag_buf[i]; |
194 | unsigned long lineval = stc_line_buf[i]; |
195 | printk("%s: STC_TAG(%d)[PA(%016lx)VA(%08lx)V(%d)R(%d)]\n" , |
196 | pbm->name, |
197 | i, |
198 | ((tagval & SCHIZO_STCTAG_PPN) >> 19UL), |
199 | (tagval & SCHIZO_STCTAG_VPN), |
200 | ((tagval & SCHIZO_STCTAG_VALID) ? 1 : 0), |
201 | ((tagval & SCHIZO_STCTAG_READ) ? 1 : 0)); |
202 | |
203 | /* XXX Should spit out per-bank error information... -DaveM */ |
204 | printk("%s: STC_LINE(%d)[LIDX(%lx)SP(%lx)LADDR(%lx)EP(%lx)" |
205 | "V(%d)FOFN(%d)]\n" , |
206 | pbm->name, |
207 | i, |
208 | ((lineval & SCHIZO_STCLINE_LINDX) >> 23UL), |
209 | ((lineval & SCHIZO_STCLINE_SPTR) >> 13UL), |
210 | ((lineval & SCHIZO_STCLINE_LADDR) >> 6UL), |
211 | ((lineval & SCHIZO_STCLINE_EPTR) >> 0UL), |
212 | ((lineval & SCHIZO_STCLINE_VALID) ? 1 : 0), |
213 | ((lineval & SCHIZO_STCLINE_FOFN) ? 1 : 0)); |
214 | } |
215 | } |
216 | |
217 | spin_unlock(lock: &stc_buf_lock); |
218 | } |
219 | |
220 | /* IOMMU is per-PBM in Schizo, so interrogate both for anonymous |
221 | * controller level errors. |
222 | */ |
223 | |
224 | #define SCHIZO_IOMMU_TAG 0xa580UL |
225 | #define SCHIZO_IOMMU_DATA 0xa600UL |
226 | |
227 | #define SCHIZO_IOMMU_TAG_CTXT 0x0000001ffe000000UL |
228 | #define SCHIZO_IOMMU_TAG_ERRSTS 0x0000000001800000UL |
229 | #define SCHIZO_IOMMU_TAG_ERR 0x0000000000400000UL |
230 | #define SCHIZO_IOMMU_TAG_WRITE 0x0000000000200000UL |
231 | #define SCHIZO_IOMMU_TAG_STREAM 0x0000000000100000UL |
232 | #define SCHIZO_IOMMU_TAG_SIZE 0x0000000000080000UL |
233 | #define SCHIZO_IOMMU_TAG_VPAGE 0x000000000007ffffUL |
234 | |
235 | #define SCHIZO_IOMMU_DATA_VALID 0x0000000100000000UL |
236 | #define SCHIZO_IOMMU_DATA_CACHE 0x0000000040000000UL |
237 | #define SCHIZO_IOMMU_DATA_PPAGE 0x000000003fffffffUL |
238 | |
239 | static void schizo_check_iommu_error_pbm(struct pci_pbm_info *pbm, |
240 | enum schizo_error_type type) |
241 | { |
242 | struct iommu *iommu = pbm->iommu; |
243 | unsigned long iommu_tag[16]; |
244 | unsigned long iommu_data[16]; |
245 | unsigned long flags; |
246 | u64 control; |
247 | int i; |
248 | |
249 | spin_lock_irqsave(&iommu->lock, flags); |
250 | control = upa_readq(iommu->iommu_control); |
251 | if (control & SCHIZO_IOMMU_CTRL_XLTEERR) { |
252 | unsigned long base; |
253 | char *type_string; |
254 | |
255 | /* Clear the error encountered bit. */ |
256 | control &= ~SCHIZO_IOMMU_CTRL_XLTEERR; |
257 | upa_writeq(control, iommu->iommu_control); |
258 | |
259 | switch((control & SCHIZO_IOMMU_CTRL_XLTESTAT) >> 25UL) { |
260 | case 0: |
261 | type_string = "Protection Error" ; |
262 | break; |
263 | case 1: |
264 | type_string = "Invalid Error" ; |
265 | break; |
266 | case 2: |
267 | type_string = "TimeOut Error" ; |
268 | break; |
269 | case 3: |
270 | default: |
271 | type_string = "ECC Error" ; |
272 | break; |
273 | } |
274 | printk("%s: IOMMU Error, type[%s]\n" , |
275 | pbm->name, type_string); |
276 | |
277 | /* Put the IOMMU into diagnostic mode and probe |
278 | * its TLB for entries with error status. |
279 | * |
280 | * It is very possible for another DVMA to occur |
281 | * while we do this probe, and corrupt the system |
282 | * further. But we are so screwed at this point |
283 | * that we are likely to crash hard anyways, so |
284 | * get as much diagnostic information to the |
285 | * console as we can. |
286 | */ |
287 | upa_writeq(control | SCHIZO_IOMMU_CTRL_DENAB, |
288 | iommu->iommu_control); |
289 | |
290 | base = pbm->pbm_regs; |
291 | |
292 | for (i = 0; i < 16; i++) { |
293 | iommu_tag[i] = |
294 | upa_readq(base + SCHIZO_IOMMU_TAG + (i * 8UL)); |
295 | iommu_data[i] = |
296 | upa_readq(base + SCHIZO_IOMMU_DATA + (i * 8UL)); |
297 | |
298 | /* Now clear out the entry. */ |
299 | upa_writeq(0, base + SCHIZO_IOMMU_TAG + (i * 8UL)); |
300 | upa_writeq(0, base + SCHIZO_IOMMU_DATA + (i * 8UL)); |
301 | } |
302 | |
303 | /* Leave diagnostic mode. */ |
304 | upa_writeq(control, iommu->iommu_control); |
305 | |
306 | for (i = 0; i < 16; i++) { |
307 | unsigned long tag, data; |
308 | |
309 | tag = iommu_tag[i]; |
310 | if (!(tag & SCHIZO_IOMMU_TAG_ERR)) |
311 | continue; |
312 | |
313 | data = iommu_data[i]; |
314 | switch((tag & SCHIZO_IOMMU_TAG_ERRSTS) >> 23UL) { |
315 | case 0: |
316 | type_string = "Protection Error" ; |
317 | break; |
318 | case 1: |
319 | type_string = "Invalid Error" ; |
320 | break; |
321 | case 2: |
322 | type_string = "TimeOut Error" ; |
323 | break; |
324 | case 3: |
325 | default: |
326 | type_string = "ECC Error" ; |
327 | break; |
328 | } |
329 | printk("%s: IOMMU TAG(%d)[error(%s) ctx(%x) wr(%d) str(%d) " |
330 | "sz(%dK) vpg(%08lx)]\n" , |
331 | pbm->name, i, type_string, |
332 | (int)((tag & SCHIZO_IOMMU_TAG_CTXT) >> 25UL), |
333 | ((tag & SCHIZO_IOMMU_TAG_WRITE) ? 1 : 0), |
334 | ((tag & SCHIZO_IOMMU_TAG_STREAM) ? 1 : 0), |
335 | ((tag & SCHIZO_IOMMU_TAG_SIZE) ? 64 : 8), |
336 | (tag & SCHIZO_IOMMU_TAG_VPAGE) << IOMMU_PAGE_SHIFT); |
337 | printk("%s: IOMMU DATA(%d)[valid(%d) cache(%d) ppg(%016lx)]\n" , |
338 | pbm->name, i, |
339 | ((data & SCHIZO_IOMMU_DATA_VALID) ? 1 : 0), |
340 | ((data & SCHIZO_IOMMU_DATA_CACHE) ? 1 : 0), |
341 | (data & SCHIZO_IOMMU_DATA_PPAGE) << IOMMU_PAGE_SHIFT); |
342 | } |
343 | } |
344 | if (pbm->stc.strbuf_enabled) |
345 | __schizo_check_stc_error_pbm(pbm, type); |
346 | spin_unlock_irqrestore(lock: &iommu->lock, flags); |
347 | } |
348 | |
349 | static void schizo_check_iommu_error(struct pci_pbm_info *pbm, |
350 | enum schizo_error_type type) |
351 | { |
352 | schizo_check_iommu_error_pbm(pbm, type); |
353 | if (pbm->sibling) |
354 | schizo_check_iommu_error_pbm(pbm: pbm->sibling, type); |
355 | } |
356 | |
357 | /* Uncorrectable ECC error status gathering. */ |
358 | #define SCHIZO_UE_AFSR 0x10030UL |
359 | #define SCHIZO_UE_AFAR 0x10038UL |
360 | |
361 | #define SCHIZO_UEAFSR_PPIO 0x8000000000000000UL /* Safari */ |
362 | #define SCHIZO_UEAFSR_PDRD 0x4000000000000000UL /* Safari/Tomatillo */ |
363 | #define SCHIZO_UEAFSR_PDWR 0x2000000000000000UL /* Safari */ |
364 | #define SCHIZO_UEAFSR_SPIO 0x1000000000000000UL /* Safari */ |
365 | #define SCHIZO_UEAFSR_SDMA 0x0800000000000000UL /* Safari/Tomatillo */ |
366 | #define SCHIZO_UEAFSR_ERRPNDG 0x0300000000000000UL /* Safari */ |
367 | #define SCHIZO_UEAFSR_BMSK 0x000003ff00000000UL /* Safari */ |
368 | #define SCHIZO_UEAFSR_QOFF 0x00000000c0000000UL /* Safari/Tomatillo */ |
369 | #define SCHIZO_UEAFSR_AID 0x000000001f000000UL /* Safari/Tomatillo */ |
370 | #define SCHIZO_UEAFSR_PARTIAL 0x0000000000800000UL /* Safari */ |
371 | #define SCHIZO_UEAFSR_OWNEDIN 0x0000000000400000UL /* Safari */ |
372 | #define SCHIZO_UEAFSR_MTAGSYND 0x00000000000f0000UL /* Safari */ |
373 | #define SCHIZO_UEAFSR_MTAG 0x000000000000e000UL /* Safari */ |
374 | #define SCHIZO_UEAFSR_ECCSYND 0x00000000000001ffUL /* Safari */ |
375 | |
376 | static irqreturn_t schizo_ue_intr(int irq, void *dev_id) |
377 | { |
378 | struct pci_pbm_info *pbm = dev_id; |
379 | unsigned long afsr_reg = pbm->controller_regs + SCHIZO_UE_AFSR; |
380 | unsigned long afar_reg = pbm->controller_regs + SCHIZO_UE_AFAR; |
381 | unsigned long afsr, afar, error_bits; |
382 | int reported, limit; |
383 | |
384 | /* Latch uncorrectable error status. */ |
385 | afar = upa_readq(afar_reg); |
386 | |
387 | /* If either of the error pending bits are set in the |
388 | * AFSR, the error status is being actively updated by |
389 | * the hardware and we must re-read to get a clean value. |
390 | */ |
391 | limit = 1000; |
392 | do { |
393 | afsr = upa_readq(afsr_reg); |
394 | } while ((afsr & SCHIZO_UEAFSR_ERRPNDG) != 0 && --limit); |
395 | |
396 | /* Clear the primary/secondary error status bits. */ |
397 | error_bits = afsr & |
398 | (SCHIZO_UEAFSR_PPIO | SCHIZO_UEAFSR_PDRD | SCHIZO_UEAFSR_PDWR | |
399 | SCHIZO_UEAFSR_SPIO | SCHIZO_UEAFSR_SDMA); |
400 | if (!error_bits) |
401 | return IRQ_NONE; |
402 | upa_writeq(error_bits, afsr_reg); |
403 | |
404 | /* Log the error. */ |
405 | printk("%s: Uncorrectable Error, primary error type[%s]\n" , |
406 | pbm->name, |
407 | (((error_bits & SCHIZO_UEAFSR_PPIO) ? |
408 | "PIO" : |
409 | ((error_bits & SCHIZO_UEAFSR_PDRD) ? |
410 | "DMA Read" : |
411 | ((error_bits & SCHIZO_UEAFSR_PDWR) ? |
412 | "DMA Write" : "???" ))))); |
413 | printk("%s: bytemask[%04lx] qword_offset[%lx] SAFARI_AID[%02lx]\n" , |
414 | pbm->name, |
415 | (afsr & SCHIZO_UEAFSR_BMSK) >> 32UL, |
416 | (afsr & SCHIZO_UEAFSR_QOFF) >> 30UL, |
417 | (afsr & SCHIZO_UEAFSR_AID) >> 24UL); |
418 | printk("%s: partial[%d] owned_in[%d] mtag[%lx] mtag_synd[%lx] ecc_sync[%lx]\n" , |
419 | pbm->name, |
420 | (afsr & SCHIZO_UEAFSR_PARTIAL) ? 1 : 0, |
421 | (afsr & SCHIZO_UEAFSR_OWNEDIN) ? 1 : 0, |
422 | (afsr & SCHIZO_UEAFSR_MTAG) >> 13UL, |
423 | (afsr & SCHIZO_UEAFSR_MTAGSYND) >> 16UL, |
424 | (afsr & SCHIZO_UEAFSR_ECCSYND) >> 0UL); |
425 | printk("%s: UE AFAR [%016lx]\n" , pbm->name, afar); |
426 | printk("%s: UE Secondary errors [" , pbm->name); |
427 | reported = 0; |
428 | if (afsr & SCHIZO_UEAFSR_SPIO) { |
429 | reported++; |
430 | printk("(PIO)" ); |
431 | } |
432 | if (afsr & SCHIZO_UEAFSR_SDMA) { |
433 | reported++; |
434 | printk("(DMA)" ); |
435 | } |
436 | if (!reported) |
437 | printk("(none)" ); |
438 | printk("]\n" ); |
439 | |
440 | /* Interrogate IOMMU for error status. */ |
441 | schizo_check_iommu_error(pbm, type: UE_ERR); |
442 | |
443 | return IRQ_HANDLED; |
444 | } |
445 | |
446 | #define SCHIZO_CE_AFSR 0x10040UL |
447 | #define SCHIZO_CE_AFAR 0x10048UL |
448 | |
449 | #define SCHIZO_CEAFSR_PPIO 0x8000000000000000UL |
450 | #define SCHIZO_CEAFSR_PDRD 0x4000000000000000UL |
451 | #define SCHIZO_CEAFSR_PDWR 0x2000000000000000UL |
452 | #define SCHIZO_CEAFSR_SPIO 0x1000000000000000UL |
453 | #define SCHIZO_CEAFSR_SDMA 0x0800000000000000UL |
454 | #define SCHIZO_CEAFSR_ERRPNDG 0x0300000000000000UL |
455 | #define SCHIZO_CEAFSR_BMSK 0x000003ff00000000UL |
456 | #define SCHIZO_CEAFSR_QOFF 0x00000000c0000000UL |
457 | #define SCHIZO_CEAFSR_AID 0x000000001f000000UL |
458 | #define SCHIZO_CEAFSR_PARTIAL 0x0000000000800000UL |
459 | #define SCHIZO_CEAFSR_OWNEDIN 0x0000000000400000UL |
460 | #define SCHIZO_CEAFSR_MTAGSYND 0x00000000000f0000UL |
461 | #define SCHIZO_CEAFSR_MTAG 0x000000000000e000UL |
462 | #define SCHIZO_CEAFSR_ECCSYND 0x00000000000001ffUL |
463 | |
464 | static irqreturn_t schizo_ce_intr(int irq, void *dev_id) |
465 | { |
466 | struct pci_pbm_info *pbm = dev_id; |
467 | unsigned long afsr_reg = pbm->controller_regs + SCHIZO_CE_AFSR; |
468 | unsigned long afar_reg = pbm->controller_regs + SCHIZO_CE_AFAR; |
469 | unsigned long afsr, afar, error_bits; |
470 | int reported, limit; |
471 | |
472 | /* Latch error status. */ |
473 | afar = upa_readq(afar_reg); |
474 | |
475 | /* If either of the error pending bits are set in the |
476 | * AFSR, the error status is being actively updated by |
477 | * the hardware and we must re-read to get a clean value. |
478 | */ |
479 | limit = 1000; |
480 | do { |
481 | afsr = upa_readq(afsr_reg); |
482 | } while ((afsr & SCHIZO_UEAFSR_ERRPNDG) != 0 && --limit); |
483 | |
484 | /* Clear primary/secondary error status bits. */ |
485 | error_bits = afsr & |
486 | (SCHIZO_CEAFSR_PPIO | SCHIZO_CEAFSR_PDRD | SCHIZO_CEAFSR_PDWR | |
487 | SCHIZO_CEAFSR_SPIO | SCHIZO_CEAFSR_SDMA); |
488 | if (!error_bits) |
489 | return IRQ_NONE; |
490 | upa_writeq(error_bits, afsr_reg); |
491 | |
492 | /* Log the error. */ |
493 | printk("%s: Correctable Error, primary error type[%s]\n" , |
494 | pbm->name, |
495 | (((error_bits & SCHIZO_CEAFSR_PPIO) ? |
496 | "PIO" : |
497 | ((error_bits & SCHIZO_CEAFSR_PDRD) ? |
498 | "DMA Read" : |
499 | ((error_bits & SCHIZO_CEAFSR_PDWR) ? |
500 | "DMA Write" : "???" ))))); |
501 | |
502 | /* XXX Use syndrome and afar to print out module string just like |
503 | * XXX UDB CE trap handler does... -DaveM |
504 | */ |
505 | printk("%s: bytemask[%04lx] qword_offset[%lx] SAFARI_AID[%02lx]\n" , |
506 | pbm->name, |
507 | (afsr & SCHIZO_UEAFSR_BMSK) >> 32UL, |
508 | (afsr & SCHIZO_UEAFSR_QOFF) >> 30UL, |
509 | (afsr & SCHIZO_UEAFSR_AID) >> 24UL); |
510 | printk("%s: partial[%d] owned_in[%d] mtag[%lx] mtag_synd[%lx] ecc_sync[%lx]\n" , |
511 | pbm->name, |
512 | (afsr & SCHIZO_UEAFSR_PARTIAL) ? 1 : 0, |
513 | (afsr & SCHIZO_UEAFSR_OWNEDIN) ? 1 : 0, |
514 | (afsr & SCHIZO_UEAFSR_MTAG) >> 13UL, |
515 | (afsr & SCHIZO_UEAFSR_MTAGSYND) >> 16UL, |
516 | (afsr & SCHIZO_UEAFSR_ECCSYND) >> 0UL); |
517 | printk("%s: CE AFAR [%016lx]\n" , pbm->name, afar); |
518 | printk("%s: CE Secondary errors [" , pbm->name); |
519 | reported = 0; |
520 | if (afsr & SCHIZO_CEAFSR_SPIO) { |
521 | reported++; |
522 | printk("(PIO)" ); |
523 | } |
524 | if (afsr & SCHIZO_CEAFSR_SDMA) { |
525 | reported++; |
526 | printk("(DMA)" ); |
527 | } |
528 | if (!reported) |
529 | printk("(none)" ); |
530 | printk("]\n" ); |
531 | |
532 | return IRQ_HANDLED; |
533 | } |
534 | |
535 | #define SCHIZO_PCI_AFSR 0x2010UL |
536 | #define SCHIZO_PCI_AFAR 0x2018UL |
537 | |
538 | #define SCHIZO_PCIAFSR_PMA 0x8000000000000000UL /* Schizo/Tomatillo */ |
539 | #define SCHIZO_PCIAFSR_PTA 0x4000000000000000UL /* Schizo/Tomatillo */ |
540 | #define SCHIZO_PCIAFSR_PRTRY 0x2000000000000000UL /* Schizo/Tomatillo */ |
541 | #define SCHIZO_PCIAFSR_PPERR 0x1000000000000000UL /* Schizo/Tomatillo */ |
542 | #define SCHIZO_PCIAFSR_PTTO 0x0800000000000000UL /* Schizo/Tomatillo */ |
543 | #define SCHIZO_PCIAFSR_PUNUS 0x0400000000000000UL /* Schizo */ |
544 | #define SCHIZO_PCIAFSR_SMA 0x0200000000000000UL /* Schizo/Tomatillo */ |
545 | #define SCHIZO_PCIAFSR_STA 0x0100000000000000UL /* Schizo/Tomatillo */ |
546 | #define SCHIZO_PCIAFSR_SRTRY 0x0080000000000000UL /* Schizo/Tomatillo */ |
547 | #define SCHIZO_PCIAFSR_SPERR 0x0040000000000000UL /* Schizo/Tomatillo */ |
548 | #define SCHIZO_PCIAFSR_STTO 0x0020000000000000UL /* Schizo/Tomatillo */ |
549 | #define SCHIZO_PCIAFSR_SUNUS 0x0010000000000000UL /* Schizo */ |
550 | #define SCHIZO_PCIAFSR_BMSK 0x000003ff00000000UL /* Schizo/Tomatillo */ |
551 | #define SCHIZO_PCIAFSR_BLK 0x0000000080000000UL /* Schizo/Tomatillo */ |
552 | #define SCHIZO_PCIAFSR_CFG 0x0000000040000000UL /* Schizo/Tomatillo */ |
553 | #define SCHIZO_PCIAFSR_MEM 0x0000000020000000UL /* Schizo/Tomatillo */ |
554 | #define SCHIZO_PCIAFSR_IO 0x0000000010000000UL /* Schizo/Tomatillo */ |
555 | |
556 | #define SCHIZO_PCI_CTRL (0x2000UL) |
557 | #define SCHIZO_PCICTRL_BUS_UNUS (1UL << 63UL) /* Safari */ |
558 | #define SCHIZO_PCICTRL_DTO_INT (1UL << 61UL) /* Tomatillo */ |
559 | #define SCHIZO_PCICTRL_ARB_PRIO (0x1ff << 52UL) /* Tomatillo */ |
560 | #define SCHIZO_PCICTRL_ESLCK (1UL << 51UL) /* Safari */ |
561 | #define SCHIZO_PCICTRL_ERRSLOT (7UL << 48UL) /* Safari */ |
562 | #define SCHIZO_PCICTRL_TTO_ERR (1UL << 38UL) /* Safari/Tomatillo */ |
563 | #define SCHIZO_PCICTRL_RTRY_ERR (1UL << 37UL) /* Safari/Tomatillo */ |
564 | #define SCHIZO_PCICTRL_DTO_ERR (1UL << 36UL) /* Safari/Tomatillo */ |
565 | #define SCHIZO_PCICTRL_SBH_ERR (1UL << 35UL) /* Safari */ |
566 | #define SCHIZO_PCICTRL_SERR (1UL << 34UL) /* Safari/Tomatillo */ |
567 | #define SCHIZO_PCICTRL_PCISPD (1UL << 33UL) /* Safari */ |
568 | #define SCHIZO_PCICTRL_MRM_PREF (1UL << 30UL) /* Tomatillo */ |
569 | #define SCHIZO_PCICTRL_RDO_PREF (1UL << 29UL) /* Tomatillo */ |
570 | #define SCHIZO_PCICTRL_RDL_PREF (1UL << 28UL) /* Tomatillo */ |
571 | #define SCHIZO_PCICTRL_PTO (3UL << 24UL) /* Safari/Tomatillo */ |
572 | #define SCHIZO_PCICTRL_PTO_SHIFT 24UL |
573 | #define SCHIZO_PCICTRL_TRWSW (7UL << 21UL) /* Tomatillo */ |
574 | #define SCHIZO_PCICTRL_F_TGT_A (1UL << 20UL) /* Tomatillo */ |
575 | #define SCHIZO_PCICTRL_S_DTO_INT (1UL << 19UL) /* Safari */ |
576 | #define SCHIZO_PCICTRL_F_TGT_RT (1UL << 19UL) /* Tomatillo */ |
577 | #define SCHIZO_PCICTRL_SBH_INT (1UL << 18UL) /* Safari */ |
578 | #define SCHIZO_PCICTRL_T_DTO_INT (1UL << 18UL) /* Tomatillo */ |
579 | #define SCHIZO_PCICTRL_EEN (1UL << 17UL) /* Safari/Tomatillo */ |
580 | #define SCHIZO_PCICTRL_PARK (1UL << 16UL) /* Safari/Tomatillo */ |
581 | #define SCHIZO_PCICTRL_PCIRST (1UL << 8UL) /* Safari */ |
582 | #define SCHIZO_PCICTRL_ARB_S (0x3fUL << 0UL) /* Safari */ |
583 | #define SCHIZO_PCICTRL_ARB_T (0xffUL << 0UL) /* Tomatillo */ |
584 | |
585 | static irqreturn_t schizo_pcierr_intr_other(struct pci_pbm_info *pbm) |
586 | { |
587 | unsigned long csr_reg, csr, csr_error_bits; |
588 | irqreturn_t ret = IRQ_NONE; |
589 | u32 stat; |
590 | |
591 | csr_reg = pbm->pbm_regs + SCHIZO_PCI_CTRL; |
592 | csr = upa_readq(csr_reg); |
593 | csr_error_bits = |
594 | csr & (SCHIZO_PCICTRL_BUS_UNUS | |
595 | SCHIZO_PCICTRL_TTO_ERR | |
596 | SCHIZO_PCICTRL_RTRY_ERR | |
597 | SCHIZO_PCICTRL_DTO_ERR | |
598 | SCHIZO_PCICTRL_SBH_ERR | |
599 | SCHIZO_PCICTRL_SERR); |
600 | if (csr_error_bits) { |
601 | /* Clear the errors. */ |
602 | upa_writeq(csr, csr_reg); |
603 | |
604 | /* Log 'em. */ |
605 | if (csr_error_bits & SCHIZO_PCICTRL_BUS_UNUS) |
606 | printk("%s: Bus unusable error asserted.\n" , |
607 | pbm->name); |
608 | if (csr_error_bits & SCHIZO_PCICTRL_TTO_ERR) |
609 | printk("%s: PCI TRDY# timeout error asserted.\n" , |
610 | pbm->name); |
611 | if (csr_error_bits & SCHIZO_PCICTRL_RTRY_ERR) |
612 | printk("%s: PCI excessive retry error asserted.\n" , |
613 | pbm->name); |
614 | if (csr_error_bits & SCHIZO_PCICTRL_DTO_ERR) |
615 | printk("%s: PCI discard timeout error asserted.\n" , |
616 | pbm->name); |
617 | if (csr_error_bits & SCHIZO_PCICTRL_SBH_ERR) |
618 | printk("%s: PCI streaming byte hole error asserted.\n" , |
619 | pbm->name); |
620 | if (csr_error_bits & SCHIZO_PCICTRL_SERR) |
621 | printk("%s: PCI SERR signal asserted.\n" , |
622 | pbm->name); |
623 | ret = IRQ_HANDLED; |
624 | } |
625 | pbm->pci_ops->read(pbm->pci_bus, 0, PCI_STATUS, 2, &stat); |
626 | if (stat & (PCI_STATUS_PARITY | |
627 | PCI_STATUS_SIG_TARGET_ABORT | |
628 | PCI_STATUS_REC_TARGET_ABORT | |
629 | PCI_STATUS_REC_MASTER_ABORT | |
630 | PCI_STATUS_SIG_SYSTEM_ERROR)) { |
631 | printk("%s: PCI bus error, PCI_STATUS[%04x]\n" , |
632 | pbm->name, stat); |
633 | pbm->pci_ops->write(pbm->pci_bus, 0, PCI_STATUS, 2, 0xffff); |
634 | ret = IRQ_HANDLED; |
635 | } |
636 | return ret; |
637 | } |
638 | |
639 | static irqreturn_t schizo_pcierr_intr(int irq, void *dev_id) |
640 | { |
641 | struct pci_pbm_info *pbm = dev_id; |
642 | unsigned long afsr_reg, afar_reg, base; |
643 | unsigned long afsr, afar, error_bits; |
644 | int reported; |
645 | |
646 | base = pbm->pbm_regs; |
647 | |
648 | afsr_reg = base + SCHIZO_PCI_AFSR; |
649 | afar_reg = base + SCHIZO_PCI_AFAR; |
650 | |
651 | /* Latch error status. */ |
652 | afar = upa_readq(afar_reg); |
653 | afsr = upa_readq(afsr_reg); |
654 | |
655 | /* Clear primary/secondary error status bits. */ |
656 | error_bits = afsr & |
657 | (SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_PTA | |
658 | SCHIZO_PCIAFSR_PRTRY | SCHIZO_PCIAFSR_PPERR | |
659 | SCHIZO_PCIAFSR_PTTO | SCHIZO_PCIAFSR_PUNUS | |
660 | SCHIZO_PCIAFSR_SMA | SCHIZO_PCIAFSR_STA | |
661 | SCHIZO_PCIAFSR_SRTRY | SCHIZO_PCIAFSR_SPERR | |
662 | SCHIZO_PCIAFSR_STTO | SCHIZO_PCIAFSR_SUNUS); |
663 | if (!error_bits) |
664 | return schizo_pcierr_intr_other(pbm); |
665 | upa_writeq(error_bits, afsr_reg); |
666 | |
667 | /* Log the error. */ |
668 | printk("%s: PCI Error, primary error type[%s]\n" , |
669 | pbm->name, |
670 | (((error_bits & SCHIZO_PCIAFSR_PMA) ? |
671 | "Master Abort" : |
672 | ((error_bits & SCHIZO_PCIAFSR_PTA) ? |
673 | "Target Abort" : |
674 | ((error_bits & SCHIZO_PCIAFSR_PRTRY) ? |
675 | "Excessive Retries" : |
676 | ((error_bits & SCHIZO_PCIAFSR_PPERR) ? |
677 | "Parity Error" : |
678 | ((error_bits & SCHIZO_PCIAFSR_PTTO) ? |
679 | "Timeout" : |
680 | ((error_bits & SCHIZO_PCIAFSR_PUNUS) ? |
681 | "Bus Unusable" : "???" )))))))); |
682 | printk("%s: bytemask[%04lx] was_block(%d) space(%s)\n" , |
683 | pbm->name, |
684 | (afsr & SCHIZO_PCIAFSR_BMSK) >> 32UL, |
685 | (afsr & SCHIZO_PCIAFSR_BLK) ? 1 : 0, |
686 | ((afsr & SCHIZO_PCIAFSR_CFG) ? |
687 | "Config" : |
688 | ((afsr & SCHIZO_PCIAFSR_MEM) ? |
689 | "Memory" : |
690 | ((afsr & SCHIZO_PCIAFSR_IO) ? |
691 | "I/O" : "???" )))); |
692 | printk("%s: PCI AFAR [%016lx]\n" , |
693 | pbm->name, afar); |
694 | printk("%s: PCI Secondary errors [" , |
695 | pbm->name); |
696 | reported = 0; |
697 | if (afsr & SCHIZO_PCIAFSR_SMA) { |
698 | reported++; |
699 | printk("(Master Abort)" ); |
700 | } |
701 | if (afsr & SCHIZO_PCIAFSR_STA) { |
702 | reported++; |
703 | printk("(Target Abort)" ); |
704 | } |
705 | if (afsr & SCHIZO_PCIAFSR_SRTRY) { |
706 | reported++; |
707 | printk("(Excessive Retries)" ); |
708 | } |
709 | if (afsr & SCHIZO_PCIAFSR_SPERR) { |
710 | reported++; |
711 | printk("(Parity Error)" ); |
712 | } |
713 | if (afsr & SCHIZO_PCIAFSR_STTO) { |
714 | reported++; |
715 | printk("(Timeout)" ); |
716 | } |
717 | if (afsr & SCHIZO_PCIAFSR_SUNUS) { |
718 | reported++; |
719 | printk("(Bus Unusable)" ); |
720 | } |
721 | if (!reported) |
722 | printk("(none)" ); |
723 | printk("]\n" ); |
724 | |
725 | /* For the error types shown, scan PBM's PCI bus for devices |
726 | * which have logged that error type. |
727 | */ |
728 | |
729 | /* If we see a Target Abort, this could be the result of an |
730 | * IOMMU translation error of some sort. It is extremely |
731 | * useful to log this information as usually it indicates |
732 | * a bug in the IOMMU support code or a PCI device driver. |
733 | */ |
734 | if (error_bits & (SCHIZO_PCIAFSR_PTA | SCHIZO_PCIAFSR_STA)) { |
735 | schizo_check_iommu_error(pbm, type: PCI_ERR); |
736 | pci_scan_for_target_abort(pbm, pbm->pci_bus); |
737 | } |
738 | if (error_bits & (SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_SMA)) |
739 | pci_scan_for_master_abort(pbm, pbm->pci_bus); |
740 | |
741 | /* For excessive retries, PSYCHO/PBM will abort the device |
742 | * and there is no way to specifically check for excessive |
743 | * retries in the config space status registers. So what |
744 | * we hope is that we'll catch it via the master/target |
745 | * abort events. |
746 | */ |
747 | |
748 | if (error_bits & (SCHIZO_PCIAFSR_PPERR | SCHIZO_PCIAFSR_SPERR)) |
749 | pci_scan_for_parity_error(pbm, pbm->pci_bus); |
750 | |
751 | return IRQ_HANDLED; |
752 | } |
753 | |
754 | #define SCHIZO_SAFARI_ERRLOG 0x10018UL |
755 | |
756 | #define SAFARI_ERRLOG_ERROUT 0x8000000000000000UL |
757 | |
758 | #define BUS_ERROR_BADCMD 0x4000000000000000UL /* Schizo/Tomatillo */ |
759 | #define BUS_ERROR_SSMDIS 0x2000000000000000UL /* Safari */ |
760 | #define BUS_ERROR_BADMA 0x1000000000000000UL /* Safari */ |
761 | #define BUS_ERROR_BADMB 0x0800000000000000UL /* Safari */ |
762 | #define BUS_ERROR_BADMC 0x0400000000000000UL /* Safari */ |
763 | #define BUS_ERROR_SNOOP_GR 0x0000000000200000UL /* Tomatillo */ |
764 | #define BUS_ERROR_SNOOP_PCI 0x0000000000100000UL /* Tomatillo */ |
765 | #define BUS_ERROR_SNOOP_RD 0x0000000000080000UL /* Tomatillo */ |
766 | #define BUS_ERROR_SNOOP_RDS 0x0000000000020000UL /* Tomatillo */ |
767 | #define BUS_ERROR_SNOOP_RDSA 0x0000000000010000UL /* Tomatillo */ |
768 | #define BUS_ERROR_SNOOP_OWN 0x0000000000008000UL /* Tomatillo */ |
769 | #define BUS_ERROR_SNOOP_RDO 0x0000000000004000UL /* Tomatillo */ |
770 | #define BUS_ERROR_CPU1PS 0x0000000000002000UL /* Safari */ |
771 | #define BUS_ERROR_WDATA_PERR 0x0000000000002000UL /* Tomatillo */ |
772 | #define BUS_ERROR_CPU1PB 0x0000000000001000UL /* Safari */ |
773 | #define BUS_ERROR_CTRL_PERR 0x0000000000001000UL /* Tomatillo */ |
774 | #define BUS_ERROR_CPU0PS 0x0000000000000800UL /* Safari */ |
775 | #define BUS_ERROR_SNOOP_ERR 0x0000000000000800UL /* Tomatillo */ |
776 | #define BUS_ERROR_CPU0PB 0x0000000000000400UL /* Safari */ |
777 | #define BUS_ERROR_JBUS_ILL_B 0x0000000000000400UL /* Tomatillo */ |
778 | #define BUS_ERROR_CIQTO 0x0000000000000200UL /* Safari */ |
779 | #define BUS_ERROR_LPQTO 0x0000000000000100UL /* Safari */ |
780 | #define BUS_ERROR_JBUS_ILL_C 0x0000000000000100UL /* Tomatillo */ |
781 | #define BUS_ERROR_SFPQTO 0x0000000000000080UL /* Safari */ |
782 | #define BUS_ERROR_UFPQTO 0x0000000000000040UL /* Safari */ |
783 | #define BUS_ERROR_RD_PERR 0x0000000000000040UL /* Tomatillo */ |
784 | #define BUS_ERROR_APERR 0x0000000000000020UL /* Safari/Tomatillo */ |
785 | #define BUS_ERROR_UNMAP 0x0000000000000010UL /* Safari/Tomatillo */ |
786 | #define BUS_ERROR_BUSERR 0x0000000000000004UL /* Safari/Tomatillo */ |
787 | #define BUS_ERROR_TIMEOUT 0x0000000000000002UL /* Safari/Tomatillo */ |
788 | #define BUS_ERROR_ILL 0x0000000000000001UL /* Safari */ |
789 | |
790 | /* We only expect UNMAP errors here. The rest of the Safari errors |
791 | * are marked fatal and thus cause a system reset. |
792 | */ |
793 | static irqreturn_t schizo_safarierr_intr(int irq, void *dev_id) |
794 | { |
795 | struct pci_pbm_info *pbm = dev_id; |
796 | u64 errlog; |
797 | |
798 | errlog = upa_readq(pbm->controller_regs + SCHIZO_SAFARI_ERRLOG); |
799 | upa_writeq(errlog & ~(SAFARI_ERRLOG_ERROUT), |
800 | pbm->controller_regs + SCHIZO_SAFARI_ERRLOG); |
801 | |
802 | if (!(errlog & BUS_ERROR_UNMAP)) { |
803 | printk("%s: Unexpected Safari/JBUS error interrupt, errlog[%016llx]\n" , |
804 | pbm->name, errlog); |
805 | |
806 | return IRQ_HANDLED; |
807 | } |
808 | |
809 | printk("%s: Safari/JBUS interrupt, UNMAPPED error, interrogating IOMMUs.\n" , |
810 | pbm->name); |
811 | schizo_check_iommu_error(pbm, type: SAFARI_ERR); |
812 | |
813 | return IRQ_HANDLED; |
814 | } |
815 | |
816 | /* Nearly identical to PSYCHO equivalents... */ |
817 | #define SCHIZO_ECC_CTRL 0x10020UL |
818 | #define SCHIZO_ECCCTRL_EE 0x8000000000000000UL /* Enable ECC Checking */ |
819 | #define SCHIZO_ECCCTRL_UE 0x4000000000000000UL /* Enable UE Interrupts */ |
820 | #define SCHIZO_ECCCTRL_CE 0x2000000000000000UL /* Enable CE INterrupts */ |
821 | |
822 | #define SCHIZO_SAFARI_ERRCTRL 0x10008UL |
823 | #define SCHIZO_SAFERRCTRL_EN 0x8000000000000000UL |
824 | #define SCHIZO_SAFARI_IRQCTRL 0x10010UL |
825 | #define SCHIZO_SAFIRQCTRL_EN 0x8000000000000000UL |
826 | |
827 | static int pbm_routes_this_ino(struct pci_pbm_info *pbm, u32 ino) |
828 | { |
829 | ino &= IMAP_INO; |
830 | |
831 | if (pbm->ino_bitmap & (1UL << ino)) |
832 | return 1; |
833 | |
834 | return 0; |
835 | } |
836 | |
837 | /* How the Tomatillo IRQs are routed around is pure guesswork here. |
838 | * |
839 | * All the Tomatillo devices I see in prtconf dumps seem to have only |
840 | * a single PCI bus unit attached to it. It would seem they are separate |
841 | * devices because their PortID (ie. JBUS ID) values are all different |
842 | * and thus the registers are mapped to totally different locations. |
843 | * |
844 | * However, two Tomatillo's look "similar" in that the only difference |
845 | * in their PortID is the lowest bit. |
846 | * |
847 | * So if we were to ignore this lower bit, it certainly looks like two |
848 | * PCI bus units of the same Tomatillo. I still have not really |
849 | * figured this out... |
850 | */ |
851 | static void tomatillo_register_error_handlers(struct pci_pbm_info *pbm) |
852 | { |
853 | struct platform_device *op = of_find_device_by_node(np: pbm->op->dev.of_node); |
854 | u64 tmp, err_mask, err_no_mask; |
855 | int err; |
856 | |
857 | /* Tomatillo IRQ property layout is: |
858 | * 0: PCIERR |
859 | * 1: UE ERR |
860 | * 2: CE ERR |
861 | * 3: SERR |
862 | * 4: POWER FAIL? |
863 | */ |
864 | |
865 | if (pbm_routes_this_ino(pbm, SCHIZO_UE_INO)) { |
866 | err = request_irq(irq: op->archdata.irqs[1], handler: schizo_ue_intr, flags: 0, |
867 | name: "TOMATILLO_UE" , dev: pbm); |
868 | if (err) |
869 | printk(KERN_WARNING "%s: Could not register UE, " |
870 | "err=%d\n" , pbm->name, err); |
871 | } |
872 | if (pbm_routes_this_ino(pbm, SCHIZO_CE_INO)) { |
873 | err = request_irq(irq: op->archdata.irqs[2], handler: schizo_ce_intr, flags: 0, |
874 | name: "TOMATILLO_CE" , dev: pbm); |
875 | if (err) |
876 | printk(KERN_WARNING "%s: Could not register CE, " |
877 | "err=%d\n" , pbm->name, err); |
878 | } |
879 | err = 0; |
880 | if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_A_INO)) { |
881 | err = request_irq(irq: op->archdata.irqs[0], handler: schizo_pcierr_intr, flags: 0, |
882 | name: "TOMATILLO_PCIERR" , dev: pbm); |
883 | } else if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_B_INO)) { |
884 | err = request_irq(irq: op->archdata.irqs[0], handler: schizo_pcierr_intr, flags: 0, |
885 | name: "TOMATILLO_PCIERR" , dev: pbm); |
886 | } |
887 | if (err) |
888 | printk(KERN_WARNING "%s: Could not register PCIERR, " |
889 | "err=%d\n" , pbm->name, err); |
890 | |
891 | if (pbm_routes_this_ino(pbm, SCHIZO_SERR_INO)) { |
892 | err = request_irq(irq: op->archdata.irqs[3], handler: schizo_safarierr_intr, flags: 0, |
893 | name: "TOMATILLO_SERR" , dev: pbm); |
894 | if (err) |
895 | printk(KERN_WARNING "%s: Could not register SERR, " |
896 | "err=%d\n" , pbm->name, err); |
897 | } |
898 | |
899 | /* Enable UE and CE interrupts for controller. */ |
900 | upa_writeq((SCHIZO_ECCCTRL_EE | |
901 | SCHIZO_ECCCTRL_UE | |
902 | SCHIZO_ECCCTRL_CE), pbm->controller_regs + SCHIZO_ECC_CTRL); |
903 | |
904 | /* Enable PCI Error interrupts and clear error |
905 | * bits. |
906 | */ |
907 | err_mask = (SCHIZO_PCICTRL_BUS_UNUS | |
908 | SCHIZO_PCICTRL_TTO_ERR | |
909 | SCHIZO_PCICTRL_RTRY_ERR | |
910 | SCHIZO_PCICTRL_SERR | |
911 | SCHIZO_PCICTRL_EEN); |
912 | |
913 | err_no_mask = SCHIZO_PCICTRL_DTO_ERR; |
914 | |
915 | tmp = upa_readq(pbm->pbm_regs + SCHIZO_PCI_CTRL); |
916 | tmp |= err_mask; |
917 | tmp &= ~err_no_mask; |
918 | upa_writeq(tmp, pbm->pbm_regs + SCHIZO_PCI_CTRL); |
919 | |
920 | err_mask = (SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_PTA | |
921 | SCHIZO_PCIAFSR_PRTRY | SCHIZO_PCIAFSR_PPERR | |
922 | SCHIZO_PCIAFSR_PTTO | |
923 | SCHIZO_PCIAFSR_SMA | SCHIZO_PCIAFSR_STA | |
924 | SCHIZO_PCIAFSR_SRTRY | SCHIZO_PCIAFSR_SPERR | |
925 | SCHIZO_PCIAFSR_STTO); |
926 | |
927 | upa_writeq(err_mask, pbm->pbm_regs + SCHIZO_PCI_AFSR); |
928 | |
929 | err_mask = (BUS_ERROR_BADCMD | BUS_ERROR_SNOOP_GR | |
930 | BUS_ERROR_SNOOP_PCI | BUS_ERROR_SNOOP_RD | |
931 | BUS_ERROR_SNOOP_RDS | BUS_ERROR_SNOOP_RDSA | |
932 | BUS_ERROR_SNOOP_OWN | BUS_ERROR_SNOOP_RDO | |
933 | BUS_ERROR_WDATA_PERR | BUS_ERROR_CTRL_PERR | |
934 | BUS_ERROR_SNOOP_ERR | BUS_ERROR_JBUS_ILL_B | |
935 | BUS_ERROR_JBUS_ILL_C | BUS_ERROR_RD_PERR | |
936 | BUS_ERROR_APERR | BUS_ERROR_UNMAP | |
937 | BUS_ERROR_BUSERR | BUS_ERROR_TIMEOUT); |
938 | |
939 | upa_writeq((SCHIZO_SAFERRCTRL_EN | err_mask), |
940 | pbm->controller_regs + SCHIZO_SAFARI_ERRCTRL); |
941 | |
942 | upa_writeq((SCHIZO_SAFIRQCTRL_EN | (BUS_ERROR_UNMAP)), |
943 | pbm->controller_regs + SCHIZO_SAFARI_IRQCTRL); |
944 | } |
945 | |
946 | static void schizo_register_error_handlers(struct pci_pbm_info *pbm) |
947 | { |
948 | struct platform_device *op = of_find_device_by_node(np: pbm->op->dev.of_node); |
949 | u64 tmp, err_mask, err_no_mask; |
950 | int err; |
951 | |
952 | /* Schizo IRQ property layout is: |
953 | * 0: PCIERR |
954 | * 1: UE ERR |
955 | * 2: CE ERR |
956 | * 3: SERR |
957 | * 4: POWER FAIL? |
958 | */ |
959 | |
960 | if (pbm_routes_this_ino(pbm, SCHIZO_UE_INO)) { |
961 | err = request_irq(irq: op->archdata.irqs[1], handler: schizo_ue_intr, flags: 0, |
962 | name: "SCHIZO_UE" , dev: pbm); |
963 | if (err) |
964 | printk(KERN_WARNING "%s: Could not register UE, " |
965 | "err=%d\n" , pbm->name, err); |
966 | } |
967 | if (pbm_routes_this_ino(pbm, SCHIZO_CE_INO)) { |
968 | err = request_irq(irq: op->archdata.irqs[2], handler: schizo_ce_intr, flags: 0, |
969 | name: "SCHIZO_CE" , dev: pbm); |
970 | if (err) |
971 | printk(KERN_WARNING "%s: Could not register CE, " |
972 | "err=%d\n" , pbm->name, err); |
973 | } |
974 | err = 0; |
975 | if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_A_INO)) { |
976 | err = request_irq(irq: op->archdata.irqs[0], handler: schizo_pcierr_intr, flags: 0, |
977 | name: "SCHIZO_PCIERR" , dev: pbm); |
978 | } else if (pbm_routes_this_ino(pbm, SCHIZO_PCIERR_B_INO)) { |
979 | err = request_irq(irq: op->archdata.irqs[0], handler: schizo_pcierr_intr, flags: 0, |
980 | name: "SCHIZO_PCIERR" , dev: pbm); |
981 | } |
982 | if (err) |
983 | printk(KERN_WARNING "%s: Could not register PCIERR, " |
984 | "err=%d\n" , pbm->name, err); |
985 | |
986 | if (pbm_routes_this_ino(pbm, SCHIZO_SERR_INO)) { |
987 | err = request_irq(irq: op->archdata.irqs[3], handler: schizo_safarierr_intr, flags: 0, |
988 | name: "SCHIZO_SERR" , dev: pbm); |
989 | if (err) |
990 | printk(KERN_WARNING "%s: Could not register SERR, " |
991 | "err=%d\n" , pbm->name, err); |
992 | } |
993 | |
994 | /* Enable UE and CE interrupts for controller. */ |
995 | upa_writeq((SCHIZO_ECCCTRL_EE | |
996 | SCHIZO_ECCCTRL_UE | |
997 | SCHIZO_ECCCTRL_CE), pbm->controller_regs + SCHIZO_ECC_CTRL); |
998 | |
999 | err_mask = (SCHIZO_PCICTRL_BUS_UNUS | |
1000 | SCHIZO_PCICTRL_ESLCK | |
1001 | SCHIZO_PCICTRL_TTO_ERR | |
1002 | SCHIZO_PCICTRL_RTRY_ERR | |
1003 | SCHIZO_PCICTRL_SBH_ERR | |
1004 | SCHIZO_PCICTRL_SERR | |
1005 | SCHIZO_PCICTRL_EEN); |
1006 | |
1007 | err_no_mask = (SCHIZO_PCICTRL_DTO_ERR | |
1008 | SCHIZO_PCICTRL_SBH_INT); |
1009 | |
1010 | /* Enable PCI Error interrupts and clear error |
1011 | * bits for each PBM. |
1012 | */ |
1013 | tmp = upa_readq(pbm->pbm_regs + SCHIZO_PCI_CTRL); |
1014 | tmp |= err_mask; |
1015 | tmp &= ~err_no_mask; |
1016 | upa_writeq(tmp, pbm->pbm_regs + SCHIZO_PCI_CTRL); |
1017 | |
1018 | upa_writeq((SCHIZO_PCIAFSR_PMA | SCHIZO_PCIAFSR_PTA | |
1019 | SCHIZO_PCIAFSR_PRTRY | SCHIZO_PCIAFSR_PPERR | |
1020 | SCHIZO_PCIAFSR_PTTO | SCHIZO_PCIAFSR_PUNUS | |
1021 | SCHIZO_PCIAFSR_SMA | SCHIZO_PCIAFSR_STA | |
1022 | SCHIZO_PCIAFSR_SRTRY | SCHIZO_PCIAFSR_SPERR | |
1023 | SCHIZO_PCIAFSR_STTO | SCHIZO_PCIAFSR_SUNUS), |
1024 | pbm->pbm_regs + SCHIZO_PCI_AFSR); |
1025 | |
1026 | /* Make all Safari error conditions fatal except unmapped |
1027 | * errors which we make generate interrupts. |
1028 | */ |
1029 | err_mask = (BUS_ERROR_BADCMD | BUS_ERROR_SSMDIS | |
1030 | BUS_ERROR_BADMA | BUS_ERROR_BADMB | |
1031 | BUS_ERROR_BADMC | |
1032 | BUS_ERROR_CPU1PS | BUS_ERROR_CPU1PB | |
1033 | BUS_ERROR_CPU0PS | BUS_ERROR_CPU0PB | |
1034 | BUS_ERROR_CIQTO | |
1035 | BUS_ERROR_LPQTO | BUS_ERROR_SFPQTO | |
1036 | BUS_ERROR_UFPQTO | BUS_ERROR_APERR | |
1037 | BUS_ERROR_BUSERR | BUS_ERROR_TIMEOUT | |
1038 | BUS_ERROR_ILL); |
1039 | #if 1 |
1040 | /* XXX Something wrong with some Excalibur systems |
1041 | * XXX Sun is shipping. The behavior on a 2-cpu |
1042 | * XXX machine is that both CPU1 parity error bits |
1043 | * XXX are set and are immediately set again when |
1044 | * XXX their error status bits are cleared. Just |
1045 | * XXX ignore them for now. -DaveM |
1046 | */ |
1047 | err_mask &= ~(BUS_ERROR_CPU1PS | BUS_ERROR_CPU1PB | |
1048 | BUS_ERROR_CPU0PS | BUS_ERROR_CPU0PB); |
1049 | #endif |
1050 | |
1051 | upa_writeq((SCHIZO_SAFERRCTRL_EN | err_mask), |
1052 | pbm->controller_regs + SCHIZO_SAFARI_ERRCTRL); |
1053 | } |
1054 | |
1055 | static void pbm_config_busmastering(struct pci_pbm_info *pbm) |
1056 | { |
1057 | u8 *addr; |
1058 | |
1059 | /* Set cache-line size to 64 bytes, this is actually |
1060 | * a nop but I do it for completeness. |
1061 | */ |
1062 | addr = schizo_pci_config_mkaddr(pbm, bus: pbm->pci_first_busno, |
1063 | devfn: 0, PCI_CACHE_LINE_SIZE); |
1064 | pci_config_write8(addr, val: 64 / sizeof(u32)); |
1065 | |
1066 | /* Set PBM latency timer to 64 PCI clocks. */ |
1067 | addr = schizo_pci_config_mkaddr(pbm, bus: pbm->pci_first_busno, |
1068 | devfn: 0, PCI_LATENCY_TIMER); |
1069 | pci_config_write8(addr, val: 64); |
1070 | } |
1071 | |
1072 | static void schizo_scan_bus(struct pci_pbm_info *pbm, struct device *parent) |
1073 | { |
1074 | pbm_config_busmastering(pbm); |
1075 | pbm->is_66mhz_capable = |
1076 | (of_find_property(np: pbm->op->dev.of_node, name: "66mhz-capable" , NULL) |
1077 | != NULL); |
1078 | |
1079 | pbm->pci_bus = pci_scan_one_pbm(pbm, parent); |
1080 | |
1081 | if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO) |
1082 | tomatillo_register_error_handlers(pbm); |
1083 | else |
1084 | schizo_register_error_handlers(pbm); |
1085 | } |
1086 | |
1087 | #define SCHIZO_STRBUF_CONTROL (0x02800UL) |
1088 | #define SCHIZO_STRBUF_FLUSH (0x02808UL) |
1089 | #define SCHIZO_STRBUF_FSYNC (0x02810UL) |
1090 | #define SCHIZO_STRBUF_CTXFLUSH (0x02818UL) |
1091 | #define SCHIZO_STRBUF_CTXMATCH (0x10000UL) |
1092 | |
1093 | static void schizo_pbm_strbuf_init(struct pci_pbm_info *pbm) |
1094 | { |
1095 | unsigned long base = pbm->pbm_regs; |
1096 | u64 control; |
1097 | |
1098 | if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO) { |
1099 | /* TOMATILLO lacks streaming cache. */ |
1100 | return; |
1101 | } |
1102 | |
1103 | /* SCHIZO has context flushing. */ |
1104 | pbm->stc.strbuf_control = base + SCHIZO_STRBUF_CONTROL; |
1105 | pbm->stc.strbuf_pflush = base + SCHIZO_STRBUF_FLUSH; |
1106 | pbm->stc.strbuf_fsync = base + SCHIZO_STRBUF_FSYNC; |
1107 | pbm->stc.strbuf_ctxflush = base + SCHIZO_STRBUF_CTXFLUSH; |
1108 | pbm->stc.strbuf_ctxmatch_base = base + SCHIZO_STRBUF_CTXMATCH; |
1109 | |
1110 | pbm->stc.strbuf_flushflag = (volatile unsigned long *) |
1111 | ((((unsigned long)&pbm->stc.__flushflag_buf[0]) |
1112 | + 63UL) |
1113 | & ~63UL); |
1114 | pbm->stc.strbuf_flushflag_pa = (unsigned long) |
1115 | __pa(pbm->stc.strbuf_flushflag); |
1116 | |
1117 | /* Turn off LRU locking and diag mode, enable the |
1118 | * streaming buffer and leave the rerun-disable |
1119 | * setting however OBP set it. |
1120 | */ |
1121 | control = upa_readq(pbm->stc.strbuf_control); |
1122 | control &= ~(SCHIZO_STRBUF_CTRL_LPTR | |
1123 | SCHIZO_STRBUF_CTRL_LENAB | |
1124 | SCHIZO_STRBUF_CTRL_DENAB); |
1125 | control |= SCHIZO_STRBUF_CTRL_ENAB; |
1126 | upa_writeq(control, pbm->stc.strbuf_control); |
1127 | |
1128 | pbm->stc.strbuf_enabled = 1; |
1129 | } |
1130 | |
1131 | #define SCHIZO_IOMMU_CONTROL (0x00200UL) |
1132 | #define SCHIZO_IOMMU_TSBBASE (0x00208UL) |
1133 | #define SCHIZO_IOMMU_FLUSH (0x00210UL) |
1134 | #define SCHIZO_IOMMU_CTXFLUSH (0x00218UL) |
1135 | |
1136 | static int schizo_pbm_iommu_init(struct pci_pbm_info *pbm) |
1137 | { |
1138 | static const u32 vdma_default[] = { 0xc0000000, 0x40000000 }; |
1139 | unsigned long i, tagbase, database; |
1140 | struct iommu *iommu = pbm->iommu; |
1141 | int tsbsize, err; |
1142 | const u32 *vdma; |
1143 | u32 dma_mask; |
1144 | u64 control; |
1145 | |
1146 | vdma = of_get_property(node: pbm->op->dev.of_node, name: "virtual-dma" , NULL); |
1147 | if (!vdma) |
1148 | vdma = vdma_default; |
1149 | |
1150 | dma_mask = vdma[0]; |
1151 | switch (vdma[1]) { |
1152 | case 0x20000000: |
1153 | dma_mask |= 0x1fffffff; |
1154 | tsbsize = 64; |
1155 | break; |
1156 | |
1157 | case 0x40000000: |
1158 | dma_mask |= 0x3fffffff; |
1159 | tsbsize = 128; |
1160 | break; |
1161 | |
1162 | case 0x80000000: |
1163 | dma_mask |= 0x7fffffff; |
1164 | tsbsize = 128; |
1165 | break; |
1166 | |
1167 | default: |
1168 | printk(KERN_ERR PFX "Strange virtual-dma size.\n" ); |
1169 | return -EINVAL; |
1170 | } |
1171 | |
1172 | /* Register addresses, SCHIZO has iommu ctx flushing. */ |
1173 | iommu->iommu_control = pbm->pbm_regs + SCHIZO_IOMMU_CONTROL; |
1174 | iommu->iommu_tsbbase = pbm->pbm_regs + SCHIZO_IOMMU_TSBBASE; |
1175 | iommu->iommu_flush = pbm->pbm_regs + SCHIZO_IOMMU_FLUSH; |
1176 | iommu->iommu_tags = iommu->iommu_flush + (0xa580UL - 0x0210UL); |
1177 | iommu->iommu_ctxflush = pbm->pbm_regs + SCHIZO_IOMMU_CTXFLUSH; |
1178 | |
1179 | /* We use the main control/status register of SCHIZO as the write |
1180 | * completion register. |
1181 | */ |
1182 | iommu->write_complete_reg = pbm->controller_regs + 0x10000UL; |
1183 | |
1184 | /* |
1185 | * Invalidate TLB Entries. |
1186 | */ |
1187 | control = upa_readq(iommu->iommu_control); |
1188 | control |= SCHIZO_IOMMU_CTRL_DENAB; |
1189 | upa_writeq(control, iommu->iommu_control); |
1190 | |
1191 | tagbase = SCHIZO_IOMMU_TAG, database = SCHIZO_IOMMU_DATA; |
1192 | |
1193 | for (i = 0; i < 16; i++) { |
1194 | upa_writeq(0, pbm->pbm_regs + tagbase + (i * 8UL)); |
1195 | upa_writeq(0, pbm->pbm_regs + database + (i * 8UL)); |
1196 | } |
1197 | |
1198 | /* Leave diag mode enabled for full-flushing done |
1199 | * in pci_iommu.c |
1200 | */ |
1201 | err = iommu_table_init(iommu, tsbsize * 8 * 1024, vdma[0], dma_mask, |
1202 | pbm->numa_node); |
1203 | if (err) { |
1204 | printk(KERN_ERR PFX "iommu_table_init() fails with %d\n" , err); |
1205 | return err; |
1206 | } |
1207 | |
1208 | upa_writeq(__pa(iommu->page_table), iommu->iommu_tsbbase); |
1209 | |
1210 | control = upa_readq(iommu->iommu_control); |
1211 | control &= ~(SCHIZO_IOMMU_CTRL_TSBSZ | SCHIZO_IOMMU_CTRL_TBWSZ); |
1212 | switch (tsbsize) { |
1213 | case 64: |
1214 | control |= SCHIZO_IOMMU_TSBSZ_64K; |
1215 | break; |
1216 | case 128: |
1217 | control |= SCHIZO_IOMMU_TSBSZ_128K; |
1218 | break; |
1219 | } |
1220 | |
1221 | control |= SCHIZO_IOMMU_CTRL_ENAB; |
1222 | upa_writeq(control, iommu->iommu_control); |
1223 | |
1224 | return 0; |
1225 | } |
1226 | |
1227 | #define SCHIZO_PCI_IRQ_RETRY (0x1a00UL) |
1228 | #define SCHIZO_IRQ_RETRY_INF 0xffUL |
1229 | |
1230 | #define SCHIZO_PCI_DIAG (0x2020UL) |
1231 | #define SCHIZO_PCIDIAG_D_BADECC (1UL << 10UL) /* Disable BAD ECC errors (Schizo) */ |
1232 | #define SCHIZO_PCIDIAG_D_BYPASS (1UL << 9UL) /* Disable MMU bypass mode (Schizo/Tomatillo) */ |
1233 | #define SCHIZO_PCIDIAG_D_TTO (1UL << 8UL) /* Disable TTO errors (Schizo/Tomatillo) */ |
1234 | #define SCHIZO_PCIDIAG_D_RTRYARB (1UL << 7UL) /* Disable retry arbitration (Schizo) */ |
1235 | #define SCHIZO_PCIDIAG_D_RETRY (1UL << 6UL) /* Disable retry limit (Schizo/Tomatillo) */ |
1236 | #define SCHIZO_PCIDIAG_D_INTSYNC (1UL << 5UL) /* Disable interrupt/DMA synch (Schizo/Tomatillo) */ |
1237 | #define SCHIZO_PCIDIAG_I_DMA_PARITY (1UL << 3UL) /* Invert DMA parity (Schizo/Tomatillo) */ |
1238 | #define SCHIZO_PCIDIAG_I_PIOD_PARITY (1UL << 2UL) /* Invert PIO data parity (Schizo/Tomatillo) */ |
1239 | #define SCHIZO_PCIDIAG_I_PIOA_PARITY (1UL << 1UL) /* Invert PIO address parity (Schizo/Tomatillo) */ |
1240 | |
1241 | #define TOMATILLO_PCI_IOC_CSR (0x2248UL) |
1242 | #define TOMATILLO_IOC_PART_WPENAB 0x0000000000080000UL |
1243 | #define TOMATILLO_IOC_RDMULT_PENAB 0x0000000000040000UL |
1244 | #define TOMATILLO_IOC_RDONE_PENAB 0x0000000000020000UL |
1245 | #define TOMATILLO_IOC_RDLINE_PENAB 0x0000000000010000UL |
1246 | #define TOMATILLO_IOC_RDMULT_PLEN 0x000000000000c000UL |
1247 | #define TOMATILLO_IOC_RDMULT_PLEN_SHIFT 14UL |
1248 | #define TOMATILLO_IOC_RDONE_PLEN 0x0000000000003000UL |
1249 | #define TOMATILLO_IOC_RDONE_PLEN_SHIFT 12UL |
1250 | #define TOMATILLO_IOC_RDLINE_PLEN 0x0000000000000c00UL |
1251 | #define TOMATILLO_IOC_RDLINE_PLEN_SHIFT 10UL |
1252 | #define TOMATILLO_IOC_PREF_OFF 0x00000000000003f8UL |
1253 | #define TOMATILLO_IOC_PREF_OFF_SHIFT 3UL |
1254 | #define TOMATILLO_IOC_RDMULT_CPENAB 0x0000000000000004UL |
1255 | #define TOMATILLO_IOC_RDONE_CPENAB 0x0000000000000002UL |
1256 | #define TOMATILLO_IOC_RDLINE_CPENAB 0x0000000000000001UL |
1257 | |
1258 | #define TOMATILLO_PCI_IOC_TDIAG (0x2250UL) |
1259 | #define TOMATILLO_PCI_IOC_DDIAG (0x2290UL) |
1260 | |
1261 | static void schizo_pbm_hw_init(struct pci_pbm_info *pbm) |
1262 | { |
1263 | u64 tmp; |
1264 | |
1265 | upa_writeq(5, pbm->pbm_regs + SCHIZO_PCI_IRQ_RETRY); |
1266 | |
1267 | tmp = upa_readq(pbm->pbm_regs + SCHIZO_PCI_CTRL); |
1268 | |
1269 | /* Enable arbiter for all PCI slots. */ |
1270 | tmp |= 0xff; |
1271 | |
1272 | if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO && |
1273 | pbm->chip_version >= 0x2) |
1274 | tmp |= 0x3UL << SCHIZO_PCICTRL_PTO_SHIFT; |
1275 | |
1276 | if (!of_property_read_bool(np: pbm->op->dev.of_node, propname: "no-bus-parking" )) |
1277 | tmp |= SCHIZO_PCICTRL_PARK; |
1278 | else |
1279 | tmp &= ~SCHIZO_PCICTRL_PARK; |
1280 | |
1281 | if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO && |
1282 | pbm->chip_version <= 0x1) |
1283 | tmp |= SCHIZO_PCICTRL_DTO_INT; |
1284 | else |
1285 | tmp &= ~SCHIZO_PCICTRL_DTO_INT; |
1286 | |
1287 | if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO) |
1288 | tmp |= (SCHIZO_PCICTRL_MRM_PREF | |
1289 | SCHIZO_PCICTRL_RDO_PREF | |
1290 | SCHIZO_PCICTRL_RDL_PREF); |
1291 | |
1292 | upa_writeq(tmp, pbm->pbm_regs + SCHIZO_PCI_CTRL); |
1293 | |
1294 | tmp = upa_readq(pbm->pbm_regs + SCHIZO_PCI_DIAG); |
1295 | tmp &= ~(SCHIZO_PCIDIAG_D_RTRYARB | |
1296 | SCHIZO_PCIDIAG_D_RETRY | |
1297 | SCHIZO_PCIDIAG_D_INTSYNC); |
1298 | upa_writeq(tmp, pbm->pbm_regs + SCHIZO_PCI_DIAG); |
1299 | |
1300 | if (pbm->chip_type == PBM_CHIP_TYPE_TOMATILLO) { |
1301 | /* Clear prefetch lengths to workaround a bug in |
1302 | * Jalapeno... |
1303 | */ |
1304 | tmp = (TOMATILLO_IOC_PART_WPENAB | |
1305 | (1 << TOMATILLO_IOC_PREF_OFF_SHIFT) | |
1306 | TOMATILLO_IOC_RDMULT_CPENAB | |
1307 | TOMATILLO_IOC_RDONE_CPENAB | |
1308 | TOMATILLO_IOC_RDLINE_CPENAB); |
1309 | |
1310 | upa_writeq(tmp, pbm->pbm_regs + TOMATILLO_PCI_IOC_CSR); |
1311 | } |
1312 | } |
1313 | |
1314 | static int schizo_pbm_init(struct pci_pbm_info *pbm, |
1315 | struct platform_device *op, u32 portid, |
1316 | int chip_type) |
1317 | { |
1318 | const struct linux_prom64_registers *regs; |
1319 | struct device_node *dp = op->dev.of_node; |
1320 | const char *chipset_name; |
1321 | int err; |
1322 | |
1323 | switch (chip_type) { |
1324 | case PBM_CHIP_TYPE_TOMATILLO: |
1325 | chipset_name = "TOMATILLO" ; |
1326 | break; |
1327 | |
1328 | case PBM_CHIP_TYPE_SCHIZO_PLUS: |
1329 | chipset_name = "SCHIZO+" ; |
1330 | break; |
1331 | |
1332 | case PBM_CHIP_TYPE_SCHIZO: |
1333 | default: |
1334 | chipset_name = "SCHIZO" ; |
1335 | break; |
1336 | } |
1337 | |
1338 | /* For SCHIZO, three OBP regs: |
1339 | * 1) PBM controller regs |
1340 | * 2) Schizo front-end controller regs (same for both PBMs) |
1341 | * 3) PBM PCI config space |
1342 | * |
1343 | * For TOMATILLO, four OBP regs: |
1344 | * 1) PBM controller regs |
1345 | * 2) Tomatillo front-end controller regs |
1346 | * 3) PBM PCI config space |
1347 | * 4) Ichip regs |
1348 | */ |
1349 | regs = of_get_property(node: dp, name: "reg" , NULL); |
1350 | |
1351 | pbm->next = pci_pbm_root; |
1352 | pci_pbm_root = pbm; |
1353 | |
1354 | pbm->numa_node = NUMA_NO_NODE; |
1355 | |
1356 | pbm->pci_ops = &sun4u_pci_ops; |
1357 | pbm->config_space_reg_bits = 8; |
1358 | |
1359 | pbm->index = pci_num_pbms++; |
1360 | |
1361 | pbm->portid = portid; |
1362 | pbm->op = op; |
1363 | |
1364 | pbm->chip_type = chip_type; |
1365 | pbm->chip_version = of_getintprop_default(dp, "version#" , 0); |
1366 | pbm->chip_revision = of_getintprop_default(dp, "module-version#" , 0); |
1367 | |
1368 | pbm->pbm_regs = regs[0].phys_addr; |
1369 | pbm->controller_regs = regs[1].phys_addr - 0x10000UL; |
1370 | |
1371 | if (chip_type == PBM_CHIP_TYPE_TOMATILLO) |
1372 | pbm->sync_reg = regs[3].phys_addr + 0x1a18UL; |
1373 | |
1374 | pbm->name = dp->full_name; |
1375 | |
1376 | printk("%s: %s PCI Bus Module ver[%x:%x]\n" , |
1377 | pbm->name, chipset_name, |
1378 | pbm->chip_version, pbm->chip_revision); |
1379 | |
1380 | schizo_pbm_hw_init(pbm); |
1381 | |
1382 | pci_determine_mem_io_space(pbm); |
1383 | |
1384 | pci_get_pbm_props(pbm); |
1385 | |
1386 | err = schizo_pbm_iommu_init(pbm); |
1387 | if (err) |
1388 | return err; |
1389 | |
1390 | schizo_pbm_strbuf_init(pbm); |
1391 | |
1392 | schizo_scan_bus(pbm, parent: &op->dev); |
1393 | |
1394 | return 0; |
1395 | } |
1396 | |
1397 | static inline int portid_compare(u32 x, u32 y, int chip_type) |
1398 | { |
1399 | if (chip_type == PBM_CHIP_TYPE_TOMATILLO) { |
1400 | if (x == (y ^ 1)) |
1401 | return 1; |
1402 | return 0; |
1403 | } |
1404 | return (x == y); |
1405 | } |
1406 | |
1407 | static struct pci_pbm_info *schizo_find_sibling(u32 portid, int chip_type) |
1408 | { |
1409 | struct pci_pbm_info *pbm; |
1410 | |
1411 | for (pbm = pci_pbm_root; pbm; pbm = pbm->next) { |
1412 | if (portid_compare(x: pbm->portid, y: portid, chip_type)) |
1413 | return pbm; |
1414 | } |
1415 | return NULL; |
1416 | } |
1417 | |
1418 | static int __schizo_init(struct platform_device *op, unsigned long chip_type) |
1419 | { |
1420 | struct device_node *dp = op->dev.of_node; |
1421 | struct pci_pbm_info *pbm; |
1422 | struct iommu *iommu; |
1423 | u32 portid; |
1424 | int err; |
1425 | |
1426 | portid = of_getintprop_default(dp, "portid" , 0xff); |
1427 | |
1428 | err = -ENOMEM; |
1429 | pbm = kzalloc(size: sizeof(*pbm), GFP_KERNEL); |
1430 | if (!pbm) { |
1431 | printk(KERN_ERR PFX "Cannot allocate pci_pbm_info.\n" ); |
1432 | goto out_err; |
1433 | } |
1434 | |
1435 | pbm->sibling = schizo_find_sibling(portid, chip_type); |
1436 | |
1437 | iommu = kzalloc(sizeof(struct iommu), GFP_KERNEL); |
1438 | if (!iommu) { |
1439 | printk(KERN_ERR PFX "Cannot allocate PBM A iommu.\n" ); |
1440 | goto out_free_pbm; |
1441 | } |
1442 | |
1443 | pbm->iommu = iommu; |
1444 | |
1445 | if (schizo_pbm_init(pbm, op, portid, chip_type)) |
1446 | goto out_free_iommu; |
1447 | |
1448 | if (pbm->sibling) |
1449 | pbm->sibling->sibling = pbm; |
1450 | |
1451 | dev_set_drvdata(dev: &op->dev, data: pbm); |
1452 | |
1453 | return 0; |
1454 | |
1455 | out_free_iommu: |
1456 | kfree(objp: pbm->iommu); |
1457 | |
1458 | out_free_pbm: |
1459 | kfree(objp: pbm); |
1460 | |
1461 | out_err: |
1462 | return err; |
1463 | } |
1464 | |
1465 | static int schizo_probe(struct platform_device *op) |
1466 | { |
1467 | unsigned long chip_type = (unsigned long)device_get_match_data(dev: &op->dev); |
1468 | |
1469 | if (!chip_type) |
1470 | return -EINVAL; |
1471 | return __schizo_init(op, chip_type); |
1472 | } |
1473 | |
1474 | /* The ordering of this table is very important. Some Tomatillo |
1475 | * nodes announce that they are compatible with both pci108e,a801 |
1476 | * and pci108e,8001. So list the chips in reverse chronological |
1477 | * order. |
1478 | */ |
1479 | static const struct of_device_id schizo_match[] = { |
1480 | { |
1481 | .name = "pci" , |
1482 | .compatible = "pci108e,a801" , |
1483 | .data = (void *) PBM_CHIP_TYPE_TOMATILLO, |
1484 | }, |
1485 | { |
1486 | .name = "pci" , |
1487 | .compatible = "pci108e,8002" , |
1488 | .data = (void *) PBM_CHIP_TYPE_SCHIZO_PLUS, |
1489 | }, |
1490 | { |
1491 | .name = "pci" , |
1492 | .compatible = "pci108e,8001" , |
1493 | .data = (void *) PBM_CHIP_TYPE_SCHIZO, |
1494 | }, |
1495 | {}, |
1496 | }; |
1497 | |
1498 | static struct platform_driver schizo_driver = { |
1499 | .driver = { |
1500 | .name = DRIVER_NAME, |
1501 | .of_match_table = schizo_match, |
1502 | }, |
1503 | .probe = schizo_probe, |
1504 | }; |
1505 | |
1506 | static int __init schizo_init(void) |
1507 | { |
1508 | return platform_driver_register(&schizo_driver); |
1509 | } |
1510 | |
1511 | subsys_initcall(schizo_init); |
1512 | |