1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3**
4** PCI Lower Bus Adapter (LBA) manager
5**
6** (c) Copyright 1999,2000 Grant Grundler
7** (c) Copyright 1999,2000 Hewlett-Packard Company
8**
9**
10**
11** This module primarily provides access to PCI bus (config/IOport
12** spaces) on platforms with an SBA/LBA chipset. A/B/C/J/L/N-class
13** with 4 digit model numbers - eg C3000 (and A400...sigh).
14**
15** LBA driver isn't as simple as the Dino driver because:
16** (a) this chip has substantial bug fixes between revisions
17** (Only one Dino bug has a software workaround :^( )
18** (b) has more options which we don't (yet) support (DMA hints, OLARD)
19** (c) IRQ support lives in the I/O SAPIC driver (not with PCI driver)
20** (d) play nicely with both PAT and "Legacy" PA-RISC firmware (PDC).
21** (dino only deals with "Legacy" PDC)
22**
23** LBA driver passes the I/O SAPIC HPA to the I/O SAPIC driver.
24** (I/O SAPIC is integratd in the LBA chip).
25**
26** FIXME: Add support to SBA and LBA drivers for DMA hint sets
27** FIXME: Add support for PCI card hot-plug (OLARD).
28*/
29
30#include <linux/delay.h>
31#include <linux/types.h>
32#include <linux/kernel.h>
33#include <linux/spinlock.h>
34#include <linux/init.h> /* for __init */
35#include <linux/pci.h>
36#include <linux/ioport.h>
37#include <linux/slab.h>
38
39#include <asm/byteorder.h>
40#include <asm/pdc.h>
41#include <asm/pdcpat.h>
42#include <asm/page.h>
43
44#include <asm/ropes.h>
45#include <asm/hardware.h> /* for register_parisc_driver() stuff */
46#include <asm/parisc-device.h>
47#include <asm/io.h> /* read/write stuff */
48
49#include "iommu.h"
50
51#undef DEBUG_LBA /* general stuff */
52#undef DEBUG_LBA_PORT /* debug I/O Port access */
53#undef DEBUG_LBA_CFG /* debug Config Space Access (ie PCI Bus walk) */
54#undef DEBUG_LBA_PAT /* debug PCI Resource Mgt code - PDC PAT only */
55
56#undef FBB_SUPPORT /* Fast Back-Back xfers - NOT READY YET */
57
58
59#ifdef DEBUG_LBA
60#define DBG(x...) printk(x)
61#else
62#define DBG(x...)
63#endif
64
65#ifdef DEBUG_LBA_PORT
66#define DBG_PORT(x...) printk(x)
67#else
68#define DBG_PORT(x...)
69#endif
70
71#ifdef DEBUG_LBA_CFG
72#define DBG_CFG(x...) printk(x)
73#else
74#define DBG_CFG(x...)
75#endif
76
77#ifdef DEBUG_LBA_PAT
78#define DBG_PAT(x...) printk(x)
79#else
80#define DBG_PAT(x...)
81#endif
82
83
84/*
85** Config accessor functions only pass in the 8-bit bus number and not
86** the 8-bit "PCI Segment" number. Each LBA will be assigned a PCI bus
87** number based on what firmware wrote into the scratch register.
88**
89** The "secondary" bus number is set to this before calling
90** pci_register_ops(). If any PPB's are present, the scan will
91** discover them and update the "secondary" and "subordinate"
92** fields in the pci_bus structure.
93**
94** Changes in the configuration *may* result in a different
95** bus number for each LBA depending on what firmware does.
96*/
97
98#define MODULE_NAME "LBA"
99
100/* non-postable I/O port space, densely packed */
101#define LBA_PORT_BASE (PCI_F_EXTEND | 0xfee00000UL)
102static void __iomem *astro_iop_base __read_mostly;
103
104static u32 lba_t32;
105
106/* lba flags */
107#define LBA_FLAG_SKIP_PROBE 0x10
108
109#define LBA_SKIP_PROBE(d) ((d)->flags & LBA_FLAG_SKIP_PROBE)
110
111static inline struct lba_device *LBA_DEV(struct pci_hba_data *hba)
112{
113 return container_of(hba, struct lba_device, hba);
114}
115
116/*
117** Only allow 8 subsidiary busses per LBA
118** Problem is the PCI bus numbering is globally shared.
119*/
120#define LBA_MAX_NUM_BUSES 8
121
122/************************************
123 * LBA register read and write support
124 *
125 * BE WARNED: register writes are posted.
126 * (ie follow writes which must reach HW with a read)
127 */
128#define READ_U8(addr) __raw_readb(addr)
129#define READ_U16(addr) __raw_readw(addr)
130#define READ_U32(addr) __raw_readl(addr)
131#define WRITE_U8(value, addr) __raw_writeb(value, addr)
132#define WRITE_U16(value, addr) __raw_writew(value, addr)
133#define WRITE_U32(value, addr) __raw_writel(value, addr)
134
135#define READ_REG8(addr) readb(addr)
136#define READ_REG16(addr) readw(addr)
137#define READ_REG32(addr) readl(addr)
138#define READ_REG64(addr) readq(addr)
139#define WRITE_REG8(value, addr) writeb(value, addr)
140#define WRITE_REG16(value, addr) writew(value, addr)
141#define WRITE_REG32(value, addr) writel(value, addr)
142
143
144#define LBA_CFG_TOK(bus,dfn) ((u32) ((bus)<<16 | (dfn)<<8))
145#define LBA_CFG_BUS(tok) ((u8) ((tok)>>16))
146#define LBA_CFG_DEV(tok) ((u8) ((tok)>>11) & 0x1f)
147#define LBA_CFG_FUNC(tok) ((u8) ((tok)>>8 ) & 0x7)
148
149
150/*
151** Extract LBA (Rope) number from HPA
152** REVISIT: 16 ropes for Stretch/Ike?
153*/
154#define ROPES_PER_IOC 8
155#define LBA_NUM(x) ((((unsigned long) x) >> 13) & (ROPES_PER_IOC-1))
156
157
158static void
159lba_dump_res(struct resource *r, int d)
160{
161 int i;
162
163 if (NULL == r)
164 return;
165
166 printk(KERN_DEBUG "(%p)", r->parent);
167 for (i = d; i ; --i) printk(" ");
168 printk(KERN_DEBUG "%p [%lx,%lx]/%lx\n", r,
169 (long)r->start, (long)r->end, r->flags);
170 lba_dump_res(r: r->child, d: d+2);
171 lba_dump_res(r: r->sibling, d);
172}
173
174
175/*
176** LBA rev 2.0, 2.1, 2.2, and 3.0 bus walks require a complex
177** workaround for cfg cycles:
178** -- preserve LBA state
179** -- prevent any DMA from occurring
180** -- turn on smart mode
181** -- probe with config writes before doing config reads
182** -- check ERROR_STATUS
183** -- clear ERROR_STATUS
184** -- restore LBA state
185**
186** The workaround is only used for device discovery.
187*/
188
189static int lba_device_present(u8 bus, u8 dfn, struct lba_device *d)
190{
191 u8 first_bus = d->hba.hba_bus->busn_res.start;
192 u8 last_sub_bus = d->hba.hba_bus->busn_res.end;
193
194 if ((bus < first_bus) ||
195 (bus > last_sub_bus) ||
196 ((bus - first_bus) >= LBA_MAX_NUM_BUSES)) {
197 return 0;
198 }
199
200 return 1;
201}
202
203
204
205#define LBA_CFG_SETUP(d, tok) { \
206 /* Save contents of error config register. */ \
207 error_config = READ_REG32(d->hba.base_addr + LBA_ERROR_CONFIG); \
208\
209 /* Save contents of status control register. */ \
210 status_control = READ_REG32(d->hba.base_addr + LBA_STAT_CTL); \
211\
212 /* For LBA rev 2.0, 2.1, 2.2, and 3.0, we must disable DMA \
213 ** arbitration for full bus walks. \
214 */ \
215 /* Save contents of arb mask register. */ \
216 arb_mask = READ_REG32(d->hba.base_addr + LBA_ARB_MASK); \
217\
218 /* \
219 * Turn off all device arbitration bits (i.e. everything \
220 * except arbitration enable bit). \
221 */ \
222 WRITE_REG32(0x1, d->hba.base_addr + LBA_ARB_MASK); \
223\
224 /* \
225 * Set the smart mode bit so that master aborts don't cause \
226 * LBA to go into PCI fatal mode (required). \
227 */ \
228 WRITE_REG32(error_config | LBA_SMART_MODE, d->hba.base_addr + LBA_ERROR_CONFIG); \
229}
230
231
232#define LBA_CFG_PROBE(d, tok) { \
233 /* \
234 * Setup Vendor ID write and read back the address register \
235 * to make sure that LBA is the bus master. \
236 */ \
237 WRITE_REG32(tok | PCI_VENDOR_ID, (d)->hba.base_addr + LBA_PCI_CFG_ADDR);\
238 /* \
239 * Read address register to ensure that LBA is the bus master, \
240 * which implies that DMA traffic has stopped when DMA arb is off. \
241 */ \
242 lba_t32 = READ_REG32((d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
243 /* \
244 * Generate a cfg write cycle (will have no affect on \
245 * Vendor ID register since read-only). \
246 */ \
247 WRITE_REG32(~0, (d)->hba.base_addr + LBA_PCI_CFG_DATA); \
248 /* \
249 * Make sure write has completed before proceeding further, \
250 * i.e. before setting clear enable. \
251 */ \
252 lba_t32 = READ_REG32((d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
253}
254
255
256/*
257 * HPREVISIT:
258 * -- Can't tell if config cycle got the error.
259 *
260 * OV bit is broken until rev 4.0, so can't use OV bit and
261 * LBA_ERROR_LOG_ADDR to tell if error belongs to config cycle.
262 *
263 * As of rev 4.0, no longer need the error check.
264 *
265 * -- Even if we could tell, we still want to return -1
266 * for **ANY** error (not just master abort).
267 *
268 * -- Only clear non-fatal errors (we don't want to bring
269 * LBA out of pci-fatal mode).
270 *
271 * Actually, there is still a race in which
272 * we could be clearing a fatal error. We will
273 * live with this during our initial bus walk
274 * until rev 4.0 (no driver activity during
275 * initial bus walk). The initial bus walk
276 * has race conditions concerning the use of
277 * smart mode as well.
278 */
279
280#define LBA_MASTER_ABORT_ERROR 0xc
281#define LBA_FATAL_ERROR 0x10
282
283#define LBA_CFG_MASTER_ABORT_CHECK(d, base, tok, error) { \
284 u32 error_status = 0; \
285 /* \
286 * Set clear enable (CE) bit. Unset by HW when new \
287 * errors are logged -- LBA HW ERS section 14.3.3). \
288 */ \
289 WRITE_REG32(status_control | CLEAR_ERRLOG_ENABLE, base + LBA_STAT_CTL); \
290 error_status = READ_REG32(base + LBA_ERROR_STATUS); \
291 if ((error_status & 0x1f) != 0) { \
292 /* \
293 * Fail the config read request. \
294 */ \
295 error = 1; \
296 if ((error_status & LBA_FATAL_ERROR) == 0) { \
297 /* \
298 * Clear error status (if fatal bit not set) by setting \
299 * clear error log bit (CL). \
300 */ \
301 WRITE_REG32(status_control | CLEAR_ERRLOG, base + LBA_STAT_CTL); \
302 } \
303 } \
304}
305
306#define LBA_CFG_TR4_ADDR_SETUP(d, addr) \
307 WRITE_REG32(((addr) & ~3), (d)->hba.base_addr + LBA_PCI_CFG_ADDR);
308
309#define LBA_CFG_ADDR_SETUP(d, addr) { \
310 WRITE_REG32(((addr) & ~3), (d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
311 /* \
312 * Read address register to ensure that LBA is the bus master, \
313 * which implies that DMA traffic has stopped when DMA arb is off. \
314 */ \
315 lba_t32 = READ_REG32((d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
316}
317
318
319#define LBA_CFG_RESTORE(d, base) { \
320 /* \
321 * Restore status control register (turn off clear enable). \
322 */ \
323 WRITE_REG32(status_control, base + LBA_STAT_CTL); \
324 /* \
325 * Restore error config register (turn off smart mode). \
326 */ \
327 WRITE_REG32(error_config, base + LBA_ERROR_CONFIG); \
328 /* \
329 * Restore arb mask register (reenables DMA arbitration). \
330 */ \
331 WRITE_REG32(arb_mask, base + LBA_ARB_MASK); \
332}
333
334
335
336static unsigned int
337lba_rd_cfg(struct lba_device *d, u32 tok, u8 reg, u32 size)
338{
339 u32 data = ~0U;
340 int error = 0;
341 u32 arb_mask = 0; /* used by LBA_CFG_SETUP/RESTORE */
342 u32 error_config = 0; /* used by LBA_CFG_SETUP/RESTORE */
343 u32 status_control = 0; /* used by LBA_CFG_SETUP/RESTORE */
344
345 LBA_CFG_SETUP(d, tok);
346 LBA_CFG_PROBE(d, tok);
347 LBA_CFG_MASTER_ABORT_CHECK(d, d->hba.base_addr, tok, error);
348 if (!error) {
349 void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
350
351 LBA_CFG_ADDR_SETUP(d, tok | reg);
352 switch (size) {
353 case 1: data = (u32) READ_REG8(data_reg + (reg & 3)); break;
354 case 2: data = (u32) READ_REG16(data_reg+ (reg & 2)); break;
355 case 4: data = READ_REG32(data_reg); break;
356 }
357 }
358 LBA_CFG_RESTORE(d, d->hba.base_addr);
359 return(data);
360}
361
362
363static int elroy_cfg_read(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 *data)
364{
365 struct lba_device *d = LBA_DEV(hba: parisc_walk_tree(dev: bus->bridge));
366 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
367 u32 tok = LBA_CFG_TOK(local_bus, devfn);
368 void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
369
370 if ((pos > 255) || (devfn > 255))
371 return -EINVAL;
372
373/* FIXME: B2K/C3600 workaround is always use old method... */
374 /* if (!LBA_SKIP_PROBE(d)) */ {
375 /* original - Generate config cycle on broken elroy
376 with risk we will miss PCI bus errors. */
377 *data = lba_rd_cfg(d, tok, reg: pos, size);
378 DBG_CFG("%s(%x+%2x) -> 0x%x (a)\n", __func__, tok, pos, *data);
379 return 0;
380 }
381
382 if (LBA_SKIP_PROBE(d) && !lba_device_present(bus: bus->busn_res.start, dfn: devfn, d)) {
383 DBG_CFG("%s(%x+%2x) -> -1 (b)\n", __func__, tok, pos);
384 /* either don't want to look or know device isn't present. */
385 *data = ~0U;
386 return(0);
387 }
388
389 /* Basic Algorithm
390 ** Should only get here on fully working LBA rev.
391 ** This is how simple the code should have been.
392 */
393 LBA_CFG_ADDR_SETUP(d, tok | pos);
394 switch(size) {
395 case 1: *data = READ_REG8 (data_reg + (pos & 3)); break;
396 case 2: *data = READ_REG16(data_reg + (pos & 2)); break;
397 case 4: *data = READ_REG32(data_reg); break;
398 }
399 DBG_CFG("%s(%x+%2x) -> 0x%x (c)\n", __func__, tok, pos, *data);
400 return 0;
401}
402
403
404static void
405lba_wr_cfg(struct lba_device *d, u32 tok, u8 reg, u32 data, u32 size)
406{
407 int error __maybe_unused = 0;
408 u32 arb_mask = 0;
409 u32 error_config = 0;
410 u32 status_control = 0;
411 void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
412
413 LBA_CFG_SETUP(d, tok);
414 LBA_CFG_ADDR_SETUP(d, tok | reg);
415 switch (size) {
416 case 1: WRITE_REG8 (data, data_reg + (reg & 3)); break;
417 case 2: WRITE_REG16(data, data_reg + (reg & 2)); break;
418 case 4: WRITE_REG32(data, data_reg); break;
419 }
420 LBA_CFG_MASTER_ABORT_CHECK(d, d->hba.base_addr, tok, error);
421 LBA_CFG_RESTORE(d, d->hba.base_addr);
422}
423
424
425/*
426 * LBA 4.0 config write code implements non-postable semantics
427 * by doing a read of CONFIG ADDR after the write.
428 */
429
430static int elroy_cfg_write(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 data)
431{
432 struct lba_device *d = LBA_DEV(hba: parisc_walk_tree(dev: bus->bridge));
433 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
434 u32 tok = LBA_CFG_TOK(local_bus,devfn);
435
436 if ((pos > 255) || (devfn > 255))
437 return -EINVAL;
438
439 if (!LBA_SKIP_PROBE(d)) {
440 /* Original Workaround */
441 lba_wr_cfg(d, tok, reg: pos, data: (u32) data, size);
442 DBG_CFG("%s(%x+%2x) = 0x%x (a)\n", __func__, tok, pos,data);
443 return 0;
444 }
445
446 if (LBA_SKIP_PROBE(d) && (!lba_device_present(bus: bus->busn_res.start, dfn: devfn, d))) {
447 DBG_CFG("%s(%x+%2x) = 0x%x (b)\n", __func__, tok, pos,data);
448 return 1; /* New Workaround */
449 }
450
451 DBG_CFG("%s(%x+%2x) = 0x%x (c)\n", __func__, tok, pos, data);
452
453 /* Basic Algorithm */
454 LBA_CFG_ADDR_SETUP(d, tok | pos);
455 switch(size) {
456 case 1: WRITE_REG8 (data, d->hba.base_addr + LBA_PCI_CFG_DATA + (pos & 3));
457 break;
458 case 2: WRITE_REG16(data, d->hba.base_addr + LBA_PCI_CFG_DATA + (pos & 2));
459 break;
460 case 4: WRITE_REG32(data, d->hba.base_addr + LBA_PCI_CFG_DATA);
461 break;
462 }
463 /* flush posted write */
464 lba_t32 = READ_REG32(d->hba.base_addr + LBA_PCI_CFG_ADDR);
465 return 0;
466}
467
468
469static struct pci_ops elroy_cfg_ops = {
470 .read = elroy_cfg_read,
471 .write = elroy_cfg_write,
472};
473
474/*
475 * The mercury_cfg_ops are slightly misnamed; they're also used for Elroy
476 * TR4.0 as no additional bugs were found in this areea between Elroy and
477 * Mercury
478 */
479
480static int mercury_cfg_read(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 *data)
481{
482 struct lba_device *d = LBA_DEV(hba: parisc_walk_tree(dev: bus->bridge));
483 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
484 u32 tok = LBA_CFG_TOK(local_bus, devfn);
485 void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
486
487 if ((pos > 255) || (devfn > 255))
488 return -EINVAL;
489
490 LBA_CFG_TR4_ADDR_SETUP(d, tok | pos);
491 switch(size) {
492 case 1:
493 *data = READ_REG8(data_reg + (pos & 3));
494 break;
495 case 2:
496 *data = READ_REG16(data_reg + (pos & 2));
497 break;
498 case 4:
499 *data = READ_REG32(data_reg); break;
500 break;
501 }
502
503 DBG_CFG("mercury_cfg_read(%x+%2x) -> 0x%x\n", tok, pos, *data);
504 return 0;
505}
506
507/*
508 * LBA 4.0 config write code implements non-postable semantics
509 * by doing a read of CONFIG ADDR after the write.
510 */
511
512static int mercury_cfg_write(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 data)
513{
514 struct lba_device *d = LBA_DEV(hba: parisc_walk_tree(dev: bus->bridge));
515 void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
516 u32 local_bus = (bus->parent == NULL) ? 0 : bus->busn_res.start;
517 u32 tok = LBA_CFG_TOK(local_bus,devfn);
518
519 if ((pos > 255) || (devfn > 255))
520 return -EINVAL;
521
522 DBG_CFG("%s(%x+%2x) <- 0x%x (c)\n", __func__, tok, pos, data);
523
524 LBA_CFG_TR4_ADDR_SETUP(d, tok | pos);
525 switch(size) {
526 case 1:
527 WRITE_REG8 (data, data_reg + (pos & 3));
528 break;
529 case 2:
530 WRITE_REG16(data, data_reg + (pos & 2));
531 break;
532 case 4:
533 WRITE_REG32(data, data_reg);
534 break;
535 }
536
537 /* flush posted write */
538 lba_t32 = READ_U32(d->hba.base_addr + LBA_PCI_CFG_ADDR);
539 return 0;
540}
541
542static struct pci_ops mercury_cfg_ops = {
543 .read = mercury_cfg_read,
544 .write = mercury_cfg_write,
545};
546
547
548static void
549lba_bios_init(void)
550{
551 DBG(MODULE_NAME ": lba_bios_init\n");
552}
553
554
555#ifdef CONFIG_64BIT
556
557/*
558 * truncate_pat_collision: Deal with overlaps or outright collisions
559 * between PAT PDC reported ranges.
560 *
561 * Broken PA8800 firmware will report lmmio range that
562 * overlaps with CPU HPA. Just truncate the lmmio range.
563 *
564 * BEWARE: conflicts with this lmmio range may be an
565 * elmmio range which is pointing down another rope.
566 *
567 * FIXME: only deals with one collision per range...theoretically we
568 * could have several. Supporting more than one collision will get messy.
569 */
570static unsigned long
571truncate_pat_collision(struct resource *root, struct resource *new)
572{
573 unsigned long start = new->start;
574 unsigned long end = new->end;
575 struct resource *tmp = root->child;
576
577 if (end <= start || start < root->start || !tmp)
578 return 0;
579
580 /* find first overlap */
581 while (tmp && tmp->end < start)
582 tmp = tmp->sibling;
583
584 /* no entries overlap */
585 if (!tmp) return 0;
586
587 /* found one that starts behind the new one
588 ** Don't need to do anything.
589 */
590 if (tmp->start >= end) return 0;
591
592 if (tmp->start <= start) {
593 /* "front" of new one overlaps */
594 new->start = tmp->end + 1;
595
596 if (tmp->end >= end) {
597 /* AACCKK! totally overlaps! drop this range. */
598 return 1;
599 }
600 }
601
602 if (tmp->end < end ) {
603 /* "end" of new one overlaps */
604 new->end = tmp->start - 1;
605 }
606
607 printk(KERN_WARNING "LBA: Truncating lmmio_space [%lx/%lx] "
608 "to [%lx,%lx]\n",
609 start, end,
610 (long)new->start, (long)new->end );
611
612 return 0; /* truncation successful */
613}
614
615/*
616 * extend_lmmio_len: extend lmmio range to maximum length
617 *
618 * This is needed at least on C8000 systems to get the ATI FireGL card
619 * working. On other systems we will currently not extend the lmmio space.
620 */
621static unsigned long
622extend_lmmio_len(unsigned long start, unsigned long end, unsigned long lba_len)
623{
624 struct resource *tmp;
625
626 /* exit if not a C8000 */
627 if (boot_cpu_data.cpu_type < mako)
628 return end;
629
630 pr_debug("LMMIO mismatch: PAT length = 0x%lx, MASK register = 0x%lx\n",
631 end - start, lba_len);
632
633 lba_len = min(lba_len+1, 256UL*1024*1024); /* limit to 256 MB */
634
635 pr_debug("LBA: lmmio_space [0x%lx-0x%lx] - original\n", start, end);
636
637
638 end += lba_len;
639 if (end < start) /* fix overflow */
640 end = -1ULL;
641
642 pr_debug("LBA: lmmio_space [0x%lx-0x%lx] - current\n", start, end);
643
644 /* first overlap */
645 for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling) {
646 pr_debug("LBA: testing %pR\n", tmp);
647 if (tmp->start == start)
648 continue; /* ignore ourself */
649 if (tmp->end < start)
650 continue;
651 if (tmp->start > end)
652 continue;
653 if (end >= tmp->start)
654 end = tmp->start - 1;
655 }
656
657 pr_info("LBA: lmmio_space [0x%lx-0x%lx] - new\n", start, end);
658
659 /* return new end */
660 return end;
661}
662
663#else
664#define truncate_pat_collision(r,n) (0)
665#endif
666
667static void pcibios_allocate_bridge_resources(struct pci_dev *dev)
668{
669 int idx;
670 struct resource *r;
671
672 for (idx = PCI_BRIDGE_RESOURCES; idx < PCI_NUM_RESOURCES; idx++) {
673 r = &dev->resource[idx];
674 if (!r->flags)
675 continue;
676 if (r->parent) /* Already allocated */
677 continue;
678 if (!r->start || pci_claim_bridge_resource(bridge: dev, i: idx) < 0) {
679 /*
680 * Something is wrong with the region.
681 * Invalidate the resource to prevent
682 * child resource allocations in this
683 * range.
684 */
685 r->start = r->end = 0;
686 r->flags = 0;
687 }
688 }
689}
690
691static void pcibios_allocate_bus_resources(struct pci_bus *bus)
692{
693 struct pci_bus *child;
694
695 /* Depth-First Search on bus tree */
696 if (bus->self)
697 pcibios_allocate_bridge_resources(dev: bus->self);
698 list_for_each_entry(child, &bus->children, node)
699 pcibios_allocate_bus_resources(bus: child);
700}
701
702
703/*
704** The algorithm is generic code.
705** But it needs to access local data structures to get the IRQ base.
706** Could make this a "pci_fixup_irq(bus, region)" but not sure
707** it's worth it.
708**
709** Called by do_pci_scan_bus() immediately after each PCI bus is walked.
710** Resources aren't allocated until recursive buswalk below HBA is completed.
711*/
712static void
713lba_fixup_bus(struct pci_bus *bus)
714{
715 struct pci_dev *dev;
716#ifdef FBB_SUPPORT
717 u16 status;
718#endif
719 struct lba_device *ldev = LBA_DEV(hba: parisc_walk_tree(dev: bus->bridge));
720
721 DBG("lba_fixup_bus(0x%p) bus %d platform_data 0x%p\n",
722 bus, (int)bus->busn_res.start, bus->bridge->platform_data);
723
724 /*
725 ** Properly Setup MMIO resources for this bus.
726 ** pci_alloc_primary_bus() mangles this.
727 */
728 if (bus->parent) {
729 /* PCI-PCI Bridge */
730 pci_read_bridge_bases(child: bus);
731
732 /* check and allocate bridge resources */
733 pcibios_allocate_bus_resources(bus);
734 } else {
735 /* Host-PCI Bridge */
736 int err;
737
738 DBG("lba_fixup_bus() %s [%lx/%lx]/%lx\n",
739 ldev->hba.io_space.name,
740 ldev->hba.io_space.start, ldev->hba.io_space.end,
741 ldev->hba.io_space.flags);
742 DBG("lba_fixup_bus() %s [%lx/%lx]/%lx\n",
743 ldev->hba.lmmio_space.name,
744 ldev->hba.lmmio_space.start, ldev->hba.lmmio_space.end,
745 ldev->hba.lmmio_space.flags);
746
747 err = request_resource(root: &ioport_resource, new: &(ldev->hba.io_space));
748 if (err < 0) {
749 lba_dump_res(r: &ioport_resource, d: 2);
750 BUG();
751 }
752
753 if (ldev->hba.elmmio_space.flags) {
754 err = request_resource(root: &iomem_resource,
755 new: &(ldev->hba.elmmio_space));
756 if (err < 0) {
757
758 printk("FAILED: lba_fixup_bus() request for "
759 "elmmio_space [%lx/%lx]\n",
760 (long)ldev->hba.elmmio_space.start,
761 (long)ldev->hba.elmmio_space.end);
762
763 /* lba_dump_res(&iomem_resource, 2); */
764 /* BUG(); */
765 }
766 }
767
768 if (ldev->hba.lmmio_space.flags) {
769 err = request_resource(root: &iomem_resource, new: &(ldev->hba.lmmio_space));
770 if (err < 0) {
771 printk(KERN_ERR "FAILED: lba_fixup_bus() request for "
772 "lmmio_space [%lx/%lx]\n",
773 (long)ldev->hba.lmmio_space.start,
774 (long)ldev->hba.lmmio_space.end);
775 }
776 }
777
778#ifdef CONFIG_64BIT
779 /* GMMIO is distributed range. Every LBA/Rope gets part it. */
780 if (ldev->hba.gmmio_space.flags) {
781 err = request_resource(root: &iomem_resource, new: &(ldev->hba.gmmio_space));
782 if (err < 0) {
783 printk("FAILED: lba_fixup_bus() request for "
784 "gmmio_space [%lx/%lx]\n",
785 (long)ldev->hba.gmmio_space.start,
786 (long)ldev->hba.gmmio_space.end);
787 lba_dump_res(r: &iomem_resource, d: 2);
788 BUG();
789 }
790 }
791#endif
792
793 }
794
795 list_for_each_entry(dev, &bus->devices, bus_list) {
796 int i;
797
798 DBG("lba_fixup_bus() %s\n", pci_name(dev));
799
800 /* Virtualize Device/Bridge Resources. */
801 for (i = 0; i < PCI_BRIDGE_RESOURCES; i++) {
802 struct resource *res = &dev->resource[i];
803
804 /* If resource not allocated - skip it */
805 if (!res->start)
806 continue;
807
808 /*
809 ** FIXME: this will result in whinging for devices
810 ** that share expansion ROMs (think quad tulip), but
811 ** isn't harmful.
812 */
813 pci_claim_resource(dev, i);
814 }
815
816#ifdef FBB_SUPPORT
817 /*
818 ** If one device does not support FBB transfers,
819 ** No one on the bus can be allowed to use them.
820 */
821 (void) pci_read_config_word(dev, PCI_STATUS, &status);
822 bus->bridge_ctl &= ~(status & PCI_STATUS_FAST_BACK);
823#endif
824
825 /*
826 ** P2PB's have no IRQs. ignore them.
827 */
828 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI) {
829 pcibios_init_bridge(dev);
830 continue;
831 }
832
833 /* Adjust INTERRUPT_LINE for this dev */
834 iosapic_fixup_irq(ldev->iosapic_obj, dev);
835 }
836
837#ifdef FBB_SUPPORT
838/* FIXME/REVISIT - finish figuring out to set FBB on both
839** pci_setup_bridge() clobbers PCI_BRIDGE_CONTROL.
840** Can't fixup here anyway....garr...
841*/
842 if (fbb_enable) {
843 if (bus->parent) {
844 u8 control;
845 /* enable on PPB */
846 (void) pci_read_config_byte(bus->self, PCI_BRIDGE_CONTROL, &control);
847 (void) pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, control | PCI_STATUS_FAST_BACK);
848
849 } else {
850 /* enable on LBA */
851 }
852 fbb_enable = PCI_COMMAND_FAST_BACK;
853 }
854
855 /* Lastly enable FBB/PERR/SERR on all devices too */
856 list_for_each_entry(dev, &bus->devices, bus_list) {
857 (void) pci_read_config_word(dev, PCI_COMMAND, &status);
858 status |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR | fbb_enable;
859 (void) pci_write_config_word(dev, PCI_COMMAND, status);
860 }
861#endif
862}
863
864
865static struct pci_bios_ops lba_bios_ops = {
866 .init = lba_bios_init,
867 .fixup_bus = lba_fixup_bus,
868};
869
870
871
872
873/*******************************************************
874**
875** LBA Sprockets "I/O Port" Space Accessor Functions
876**
877** This set of accessor functions is intended for use with
878** "legacy firmware" (ie Sprockets on Allegro/Forte boxes).
879**
880** Many PCI devices don't require use of I/O port space (eg Tulip,
881** NCR720) since they export the same registers to both MMIO and
882** I/O port space. In general I/O port space is slower than
883** MMIO since drivers are designed so PIO writes can be posted.
884**
885********************************************************/
886
887#define LBA_PORT_IN(size, mask) \
888static u##size lba_astro_in##size (struct pci_hba_data *d, u16 addr) \
889{ \
890 u##size t; \
891 t = READ_REG##size(astro_iop_base + addr); \
892 DBG_PORT(" 0x%x\n", t); \
893 return (t); \
894}
895
896LBA_PORT_IN( 8, 3)
897LBA_PORT_IN(16, 2)
898LBA_PORT_IN(32, 0)
899
900
901
902/*
903** BUG X4107: Ordering broken - DMA RD return can bypass PIO WR
904**
905** Fixed in Elroy 2.2. The READ_U32(..., LBA_FUNC_ID) below is
906** guarantee non-postable completion semantics - not avoid X4107.
907** The READ_U32 only guarantees the write data gets to elroy but
908** out to the PCI bus. We can't read stuff from I/O port space
909** since we don't know what has side-effects. Attempting to read
910** from configuration space would be suicidal given the number of
911** bugs in that elroy functionality.
912**
913** Description:
914** DMA read results can improperly pass PIO writes (X4107). The
915** result of this bug is that if a processor modifies a location in
916** memory after having issued PIO writes, the PIO writes are not
917** guaranteed to be completed before a PCI device is allowed to see
918** the modified data in a DMA read.
919**
920** Note that IKE bug X3719 in TR1 IKEs will result in the same
921** symptom.
922**
923** Workaround:
924** The workaround for this bug is to always follow a PIO write with
925** a PIO read to the same bus before starting DMA on that PCI bus.
926**
927*/
928#define LBA_PORT_OUT(size, mask) \
929static void lba_astro_out##size (struct pci_hba_data *d, u16 addr, u##size val) \
930{ \
931 DBG_PORT("%s(0x%p, 0x%x, 0x%x)\n", __func__, d, addr, val); \
932 WRITE_REG##size(val, astro_iop_base + addr); \
933 if (LBA_DEV(d)->hw_rev < 3) \
934 lba_t32 = READ_U32(d->base_addr + LBA_FUNC_ID); \
935}
936
937LBA_PORT_OUT( 8, 3)
938LBA_PORT_OUT(16, 2)
939LBA_PORT_OUT(32, 0)
940
941
942static struct pci_port_ops lba_astro_port_ops = {
943 .inb = lba_astro_in8,
944 .inw = lba_astro_in16,
945 .inl = lba_astro_in32,
946 .outb = lba_astro_out8,
947 .outw = lba_astro_out16,
948 .outl = lba_astro_out32
949};
950
951
952#ifdef CONFIG_64BIT
953#define PIOP_TO_GMMIO(lba, addr) \
954 ((lba)->iop_base + (((addr)&0xFFFC)<<10) + ((addr)&3))
955
956/*******************************************************
957**
958** LBA PAT "I/O Port" Space Accessor Functions
959**
960** This set of accessor functions is intended for use with
961** "PAT PDC" firmware (ie Prelude/Rhapsody/Piranha boxes).
962**
963** This uses the PIOP space located in the first 64MB of GMMIO.
964** Each rope gets a full 64*KB* (ie 4 bytes per page) this way.
965** bits 1:0 stay the same. bits 15:2 become 25:12.
966** Then add the base and we can generate an I/O Port cycle.
967********************************************************/
968#undef LBA_PORT_IN
969#define LBA_PORT_IN(size, mask) \
970static u##size lba_pat_in##size (struct pci_hba_data *l, u16 addr) \
971{ \
972 u##size t; \
973 DBG_PORT("%s(0x%p, 0x%x) ->", __func__, l, addr); \
974 t = READ_REG##size(PIOP_TO_GMMIO(LBA_DEV(l), addr)); \
975 DBG_PORT(" 0x%x\n", t); \
976 return (t); \
977}
978
979LBA_PORT_IN( 8, 3)
980LBA_PORT_IN(16, 2)
981LBA_PORT_IN(32, 0)
982
983
984#undef LBA_PORT_OUT
985#define LBA_PORT_OUT(size, mask) \
986static void lba_pat_out##size (struct pci_hba_data *l, u16 addr, u##size val) \
987{ \
988 void __iomem *where = PIOP_TO_GMMIO(LBA_DEV(l), addr); \
989 DBG_PORT("%s(0x%p, 0x%x, 0x%x)\n", __func__, l, addr, val); \
990 WRITE_REG##size(val, where); \
991 /* flush the I/O down to the elroy at least */ \
992 lba_t32 = READ_U32(l->base_addr + LBA_FUNC_ID); \
993}
994
995LBA_PORT_OUT( 8, 3)
996LBA_PORT_OUT(16, 2)
997LBA_PORT_OUT(32, 0)
998
999
1000static struct pci_port_ops lba_pat_port_ops = {
1001 .inb = lba_pat_in8,
1002 .inw = lba_pat_in16,
1003 .inl = lba_pat_in32,
1004 .outb = lba_pat_out8,
1005 .outw = lba_pat_out16,
1006 .outl = lba_pat_out32
1007};
1008
1009
1010
1011/*
1012** make range information from PDC available to PCI subsystem.
1013** We make the PDC call here in order to get the PCI bus range
1014** numbers. The rest will get forwarded in pcibios_fixup_bus().
1015** We don't have a struct pci_bus assigned to us yet.
1016*/
1017static void
1018lba_pat_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev)
1019{
1020 unsigned long bytecnt;
1021 long io_count __maybe_unused;
1022 long status; /* PDC return status */
1023 long pa_count;
1024 pdc_pat_cell_mod_maddr_block_t *pa_pdc_cell; /* PA_VIEW */
1025 pdc_pat_cell_mod_maddr_block_t *io_pdc_cell; /* IO_VIEW */
1026 int i;
1027
1028 pa_pdc_cell = kzalloc(sizeof(pdc_pat_cell_mod_maddr_block_t), GFP_KERNEL);
1029 if (!pa_pdc_cell)
1030 return;
1031
1032 io_pdc_cell = kzalloc(sizeof(pdc_pat_cell_mod_maddr_block_t), GFP_KERNEL);
1033 if (!io_pdc_cell) {
1034 kfree(pa_pdc_cell);
1035 return;
1036 }
1037
1038 /* return cell module (IO view) */
1039 status = pdc_pat_cell_module(&bytecnt, pa_dev->pcell_loc, pa_dev->mod_index,
1040 PA_VIEW, pa_pdc_cell);
1041 pa_count = pa_pdc_cell->mod[1];
1042
1043 status |= pdc_pat_cell_module(&bytecnt, pa_dev->pcell_loc, pa_dev->mod_index,
1044 IO_VIEW, io_pdc_cell);
1045 io_count = io_pdc_cell->mod[1];
1046
1047 /* We've already done this once for device discovery...*/
1048 if (status != PDC_OK) {
1049 panic(fmt: "pdc_pat_cell_module() call failed for LBA!\n");
1050 }
1051
1052 if (PAT_GET_ENTITY(pa_pdc_cell->mod_info) != PAT_ENTITY_LBA) {
1053 panic(fmt: "pdc_pat_cell_module() entity returned != PAT_ENTITY_LBA!\n");
1054 }
1055
1056 /*
1057 ** Inspect the resources PAT tells us about
1058 */
1059 for (i = 0; i < pa_count; i++) {
1060 struct {
1061 unsigned long type;
1062 unsigned long start;
1063 unsigned long end; /* aka finish */
1064 } *p, *io;
1065 struct resource *r;
1066
1067 p = (void *) &(pa_pdc_cell->mod[2+i*3]);
1068 io = (void *) &(io_pdc_cell->mod[2+i*3]);
1069
1070 /* Convert the PAT range data to PCI "struct resource" */
1071 switch(p->type & 0xff) {
1072 case PAT_PBNUM:
1073 lba_dev->hba.bus_num.start = p->start;
1074 lba_dev->hba.bus_num.end = p->end;
1075 lba_dev->hba.bus_num.flags = IORESOURCE_BUS;
1076 break;
1077
1078 case PAT_LMMIO:
1079 /* used to fix up pre-initialized MEM BARs */
1080 if (!lba_dev->hba.lmmio_space.flags) {
1081 unsigned long lba_len;
1082
1083 lba_len = ~READ_REG32(lba_dev->hba.base_addr
1084 + LBA_LMMIO_MASK);
1085 if ((p->end - p->start) != lba_len)
1086 p->end = extend_lmmio_len(start: p->start,
1087 end: p->end, lba_len);
1088
1089 sprintf(buf: lba_dev->hba.lmmio_name,
1090 fmt: "PCI%02x LMMIO",
1091 (int)lba_dev->hba.bus_num.start);
1092 lba_dev->hba.lmmio_space_offset = p->start -
1093 io->start;
1094 r = &lba_dev->hba.lmmio_space;
1095 r->name = lba_dev->hba.lmmio_name;
1096 } else if (!lba_dev->hba.elmmio_space.flags) {
1097 sprintf(buf: lba_dev->hba.elmmio_name,
1098 fmt: "PCI%02x ELMMIO",
1099 (int)lba_dev->hba.bus_num.start);
1100 r = &lba_dev->hba.elmmio_space;
1101 r->name = lba_dev->hba.elmmio_name;
1102 } else {
1103 printk(KERN_WARNING MODULE_NAME
1104 " only supports 2 LMMIO resources!\n");
1105 break;
1106 }
1107
1108 r->start = p->start;
1109 r->end = p->end;
1110 r->flags = IORESOURCE_MEM;
1111 r->parent = r->sibling = r->child = NULL;
1112 break;
1113
1114 case PAT_GMMIO:
1115 /* MMIO space > 4GB phys addr; for 64-bit BAR */
1116 sprintf(buf: lba_dev->hba.gmmio_name, fmt: "PCI%02x GMMIO",
1117 (int)lba_dev->hba.bus_num.start);
1118 r = &lba_dev->hba.gmmio_space;
1119 r->name = lba_dev->hba.gmmio_name;
1120 r->start = p->start;
1121 r->end = p->end;
1122 r->flags = IORESOURCE_MEM;
1123 r->parent = r->sibling = r->child = NULL;
1124 break;
1125
1126 case PAT_NPIOP:
1127 printk(KERN_WARNING MODULE_NAME
1128 " range[%d] : ignoring NPIOP (0x%lx)\n",
1129 i, p->start);
1130 break;
1131
1132 case PAT_PIOP:
1133 /*
1134 ** Postable I/O port space is per PCI host adapter.
1135 ** base of 64MB PIOP region
1136 */
1137 lba_dev->iop_base = ioremap(offset: p->start, size: 64 * 1024 * 1024);
1138
1139 sprintf(buf: lba_dev->hba.io_name, fmt: "PCI%02x Ports",
1140 (int)lba_dev->hba.bus_num.start);
1141 r = &lba_dev->hba.io_space;
1142 r->name = lba_dev->hba.io_name;
1143 r->start = HBA_PORT_BASE(lba_dev->hba.hba_num);
1144 r->end = r->start + HBA_PORT_SPACE_SIZE - 1;
1145 r->flags = IORESOURCE_IO;
1146 r->parent = r->sibling = r->child = NULL;
1147 break;
1148
1149 default:
1150 printk(KERN_WARNING MODULE_NAME
1151 " range[%d] : unknown pat range type (0x%lx)\n",
1152 i, p->type & 0xff);
1153 break;
1154 }
1155 }
1156
1157 kfree(pa_pdc_cell);
1158 kfree(io_pdc_cell);
1159}
1160#else
1161/* keep compiler from complaining about missing declarations */
1162#define lba_pat_port_ops lba_astro_port_ops
1163#define lba_pat_resources(pa_dev, lba_dev)
1164#endif /* CONFIG_64BIT */
1165
1166
1167static void
1168lba_legacy_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev)
1169{
1170 struct resource *r;
1171 int lba_num;
1172
1173 lba_dev->hba.lmmio_space_offset = PCI_F_EXTEND;
1174
1175 /*
1176 ** With "legacy" firmware, the lowest byte of FW_SCRATCH
1177 ** represents bus->secondary and the second byte represents
1178 ** bus->subsidiary (i.e. highest PPB programmed by firmware).
1179 ** PCI bus walk *should* end up with the same result.
1180 ** FIXME: But we don't have sanity checks in PCI or LBA.
1181 */
1182 lba_num = READ_REG32(lba_dev->hba.base_addr + LBA_FW_SCRATCH);
1183 r = &(lba_dev->hba.bus_num);
1184 r->name = "LBA PCI Busses";
1185 r->start = lba_num & 0xff;
1186 r->end = (lba_num>>8) & 0xff;
1187 r->flags = IORESOURCE_BUS;
1188
1189 /* Set up local PCI Bus resources - we don't need them for
1190 ** Legacy boxes but it's nice to see in /proc/iomem.
1191 */
1192 r = &(lba_dev->hba.lmmio_space);
1193 sprintf(buf: lba_dev->hba.lmmio_name, fmt: "PCI%02x LMMIO",
1194 (int)lba_dev->hba.bus_num.start);
1195 r->name = lba_dev->hba.lmmio_name;
1196
1197#if 1
1198 /* We want the CPU -> IO routing of addresses.
1199 * The SBA BASE/MASK registers control CPU -> IO routing.
1200 * Ask SBA what is routed to this rope/LBA.
1201 */
1202 sba_distributed_lmmio(pa_dev, r);
1203#else
1204 /*
1205 * The LBA BASE/MASK registers control IO -> System routing.
1206 *
1207 * The following code works but doesn't get us what we want.
1208 * Well, only because firmware (v5.0) on C3000 doesn't program
1209 * the LBA BASE/MASE registers to be the exact inverse of
1210 * the corresponding SBA registers. Other Astro/Pluto
1211 * based platform firmware may do it right.
1212 *
1213 * Should someone want to mess with MSI, they may need to
1214 * reprogram LBA BASE/MASK registers. Thus preserve the code
1215 * below until MSI is known to work on C3000/A500/N4000/RP3440.
1216 *
1217 * Using the code below, /proc/iomem shows:
1218 * ...
1219 * f0000000-f0ffffff : PCI00 LMMIO
1220 * f05d0000-f05d0000 : lcd_data
1221 * f05d0008-f05d0008 : lcd_cmd
1222 * f1000000-f1ffffff : PCI01 LMMIO
1223 * f4000000-f4ffffff : PCI02 LMMIO
1224 * f4000000-f4001fff : sym53c8xx
1225 * f4002000-f4003fff : sym53c8xx
1226 * f4004000-f40043ff : sym53c8xx
1227 * f4005000-f40053ff : sym53c8xx
1228 * f4007000-f4007fff : ohci_hcd
1229 * f4008000-f40083ff : tulip
1230 * f6000000-f6ffffff : PCI03 LMMIO
1231 * f8000000-fbffffff : PCI00 ELMMIO
1232 * fa100000-fa4fffff : stifb mmio
1233 * fb000000-fb1fffff : stifb fb
1234 *
1235 * But everything listed under PCI02 actually lives under PCI00.
1236 * This is clearly wrong.
1237 *
1238 * Asking SBA how things are routed tells the correct story:
1239 * LMMIO_BASE/MASK/ROUTE f4000001 fc000000 00000000
1240 * DIR0_BASE/MASK/ROUTE fa000001 fe000000 00000006
1241 * DIR1_BASE/MASK/ROUTE f9000001 ff000000 00000004
1242 * DIR2_BASE/MASK/ROUTE f0000000 fc000000 00000000
1243 * DIR3_BASE/MASK/ROUTE f0000000 fc000000 00000000
1244 *
1245 * Which looks like this in /proc/iomem:
1246 * f4000000-f47fffff : PCI00 LMMIO
1247 * f4000000-f4001fff : sym53c8xx
1248 * ...[deteled core devices - same as above]...
1249 * f4008000-f40083ff : tulip
1250 * f4800000-f4ffffff : PCI01 LMMIO
1251 * f6000000-f67fffff : PCI02 LMMIO
1252 * f7000000-f77fffff : PCI03 LMMIO
1253 * f9000000-f9ffffff : PCI02 ELMMIO
1254 * fa000000-fbffffff : PCI03 ELMMIO
1255 * fa100000-fa4fffff : stifb mmio
1256 * fb000000-fb1fffff : stifb fb
1257 *
1258 * ie all Built-in core are under now correctly under PCI00.
1259 * The "PCI02 ELMMIO" directed range is for:
1260 * +-[02]---03.0 3Dfx Interactive, Inc. Voodoo 2
1261 *
1262 * All is well now.
1263 */
1264 r->start = READ_REG32(lba_dev->hba.base_addr + LBA_LMMIO_BASE);
1265 if (r->start & 1) {
1266 unsigned long rsize;
1267
1268 r->flags = IORESOURCE_MEM;
1269 /* mmio_mask also clears Enable bit */
1270 r->start &= mmio_mask;
1271 r->start = PCI_HOST_ADDR(&lba_dev->hba, r->start);
1272 rsize = ~ READ_REG32(lba_dev->hba.base_addr + LBA_LMMIO_MASK);
1273
1274 /*
1275 ** Each rope only gets part of the distributed range.
1276 ** Adjust "window" for this rope.
1277 */
1278 rsize /= ROPES_PER_IOC;
1279 r->start += (rsize + 1) * LBA_NUM(pa_dev->hpa.start);
1280 r->end = r->start + rsize;
1281 } else {
1282 r->end = r->start = 0; /* Not enabled. */
1283 }
1284#endif
1285
1286 /*
1287 ** "Directed" ranges are used when the "distributed range" isn't
1288 ** sufficient for all devices below a given LBA. Typically devices
1289 ** like graphics cards or X25 may need a directed range when the
1290 ** bus has multiple slots (ie multiple devices) or the device
1291 ** needs more than the typical 4 or 8MB a distributed range offers.
1292 **
1293 ** The main reason for ignoring it now frigging complications.
1294 ** Directed ranges may overlap (and have precedence) over
1295 ** distributed ranges. Or a distributed range assigned to a unused
1296 ** rope may be used by a directed range on a different rope.
1297 ** Support for graphics devices may require fixing this
1298 ** since they may be assigned a directed range which overlaps
1299 ** an existing (but unused portion of) distributed range.
1300 */
1301 r = &(lba_dev->hba.elmmio_space);
1302 sprintf(buf: lba_dev->hba.elmmio_name, fmt: "PCI%02x ELMMIO",
1303 (int)lba_dev->hba.bus_num.start);
1304 r->name = lba_dev->hba.elmmio_name;
1305
1306#if 1
1307 /* See comment which precedes call to sba_directed_lmmio() */
1308 sba_directed_lmmio(pa_dev, r);
1309#else
1310 r->start = READ_REG32(lba_dev->hba.base_addr + LBA_ELMMIO_BASE);
1311
1312 if (r->start & 1) {
1313 unsigned long rsize;
1314 r->flags = IORESOURCE_MEM;
1315 /* mmio_mask also clears Enable bit */
1316 r->start &= mmio_mask;
1317 r->start = PCI_HOST_ADDR(&lba_dev->hba, r->start);
1318 rsize = READ_REG32(lba_dev->hba.base_addr + LBA_ELMMIO_MASK);
1319 r->end = r->start + ~rsize;
1320 }
1321#endif
1322
1323 r = &(lba_dev->hba.io_space);
1324 sprintf(buf: lba_dev->hba.io_name, fmt: "PCI%02x Ports",
1325 (int)lba_dev->hba.bus_num.start);
1326 r->name = lba_dev->hba.io_name;
1327 r->flags = IORESOURCE_IO;
1328 r->start = READ_REG32(lba_dev->hba.base_addr + LBA_IOS_BASE) & ~1L;
1329 r->end = r->start + (READ_REG32(lba_dev->hba.base_addr + LBA_IOS_MASK) ^ (HBA_PORT_SPACE_SIZE - 1));
1330
1331 /* Virtualize the I/O Port space ranges */
1332 lba_num = HBA_PORT_BASE(lba_dev->hba.hba_num);
1333 r->start |= lba_num;
1334 r->end |= lba_num;
1335}
1336
1337
1338/**************************************************************************
1339**
1340** LBA initialization code (HW and SW)
1341**
1342** o identify LBA chip itself
1343** o initialize LBA chip modes (HardFail)
1344** o FIXME: initialize DMA hints for reasonable defaults
1345** o enable configuration functions
1346** o call pci_register_ops() to discover devs (fixup/fixup_bus get invoked)
1347**
1348**************************************************************************/
1349
1350static int __init
1351lba_hw_init(struct lba_device *d)
1352{
1353 u32 stat;
1354 u32 bus_reset; /* PDC_PAT_BUG */
1355
1356#if 0
1357 printk(KERN_DEBUG "LBA %lx STAT_CTL %Lx ERROR_CFG %Lx STATUS %Lx DMA_CTL %Lx\n",
1358 d->hba.base_addr,
1359 READ_REG64(d->hba.base_addr + LBA_STAT_CTL),
1360 READ_REG64(d->hba.base_addr + LBA_ERROR_CONFIG),
1361 READ_REG64(d->hba.base_addr + LBA_ERROR_STATUS),
1362 READ_REG64(d->hba.base_addr + LBA_DMA_CTL) );
1363 printk(KERN_DEBUG " ARB mask %Lx pri %Lx mode %Lx mtlt %Lx\n",
1364 READ_REG64(d->hba.base_addr + LBA_ARB_MASK),
1365 READ_REG64(d->hba.base_addr + LBA_ARB_PRI),
1366 READ_REG64(d->hba.base_addr + LBA_ARB_MODE),
1367 READ_REG64(d->hba.base_addr + LBA_ARB_MTLT) );
1368 printk(KERN_DEBUG " HINT cfg 0x%Lx\n",
1369 READ_REG64(d->hba.base_addr + LBA_HINT_CFG));
1370 printk(KERN_DEBUG " HINT reg ");
1371 { int i;
1372 for (i=LBA_HINT_BASE; i< (14*8 + LBA_HINT_BASE); i+=8)
1373 printk(" %Lx", READ_REG64(d->hba.base_addr + i));
1374 }
1375 printk("\n");
1376#endif /* DEBUG_LBA_PAT */
1377
1378#ifdef CONFIG_64BIT
1379/*
1380 * FIXME add support for PDC_PAT_IO "Get slot status" - OLAR support
1381 * Only N-Class and up can really make use of Get slot status.
1382 * maybe L-class too but I've never played with it there.
1383 */
1384#endif
1385
1386 /* PDC_PAT_BUG: exhibited in rev 40.48 on L2000 */
1387 bus_reset = READ_REG32(d->hba.base_addr + LBA_STAT_CTL + 4) & 1;
1388 if (bus_reset) {
1389 printk(KERN_DEBUG "NOTICE: PCI bus reset still asserted! (clearing)\n");
1390 }
1391
1392 stat = READ_REG32(d->hba.base_addr + LBA_ERROR_CONFIG);
1393 if (stat & LBA_SMART_MODE) {
1394 printk(KERN_DEBUG "NOTICE: LBA in SMART mode! (cleared)\n");
1395 stat &= ~LBA_SMART_MODE;
1396 WRITE_REG32(stat, d->hba.base_addr + LBA_ERROR_CONFIG);
1397 }
1398
1399
1400 /*
1401 * Hard Fail vs. Soft Fail on PCI "Master Abort".
1402 *
1403 * "Master Abort" means the MMIO transaction timed out - usually due to
1404 * the device not responding to an MMIO read. We would like HF to be
1405 * enabled to find driver problems, though it means the system will
1406 * crash with a HPMC.
1407 *
1408 * In SoftFail mode "~0L" is returned as a result of a timeout on the
1409 * pci bus. This is like how PCI busses on x86 and most other
1410 * architectures behave. In order to increase compatibility with
1411 * existing (x86) PCI hardware and existing Linux drivers we enable
1412 * Soft Faul mode on PA-RISC now too.
1413 */
1414 stat = READ_REG32(d->hba.base_addr + LBA_STAT_CTL);
1415#if defined(ENABLE_HARDFAIL)
1416 WRITE_REG32(stat | HF_ENABLE, d->hba.base_addr + LBA_STAT_CTL);
1417#else
1418 WRITE_REG32(stat & ~HF_ENABLE, d->hba.base_addr + LBA_STAT_CTL);
1419#endif
1420
1421 /*
1422 ** Writing a zero to STAT_CTL.rf (bit 0) will clear reset signal
1423 ** if it's not already set. If we just cleared the PCI Bus Reset
1424 ** signal, wait a bit for the PCI devices to recover and setup.
1425 */
1426 if (bus_reset)
1427 mdelay(pci_post_reset_delay);
1428
1429 if (0 == READ_REG32(d->hba.base_addr + LBA_ARB_MASK)) {
1430 /*
1431 ** PDC_PAT_BUG: PDC rev 40.48 on L2000.
1432 ** B2000/C3600/J6000 also have this problem?
1433 **
1434 ** Elroys with hot pluggable slots don't get configured
1435 ** correctly if the slot is empty. ARB_MASK is set to 0
1436 ** and we can't master transactions on the bus if it's
1437 ** not at least one. 0x3 enables elroy and first slot.
1438 */
1439 printk(KERN_DEBUG "NOTICE: Enabling PCI Arbitration\n");
1440 WRITE_REG32(0x3, d->hba.base_addr + LBA_ARB_MASK);
1441 }
1442
1443 /*
1444 ** FIXME: Hint registers are programmed with default hint
1445 ** values by firmware. Hints should be sane even if we
1446 ** can't reprogram them the way drivers want.
1447 */
1448 return 0;
1449}
1450
1451/*
1452 * Unfortunately, when firmware numbers busses, it doesn't take into account
1453 * Cardbus bridges. So we have to renumber the busses to suit ourselves.
1454 * Elroy/Mercury don't actually know what bus number they're attached to;
1455 * we use bus 0 to indicate the directly attached bus and any other bus
1456 * number will be taken care of by the PCI-PCI bridge.
1457 */
1458static unsigned int lba_next_bus = 0;
1459
1460/*
1461 * Determine if lba should claim this chip (return 0) or not (return 1).
1462 * If so, initialize the chip and tell other partners in crime they
1463 * have work to do.
1464 */
1465static int __init
1466lba_driver_probe(struct parisc_device *dev)
1467{
1468 struct lba_device *lba_dev;
1469 LIST_HEAD(resources);
1470 struct pci_bus *lba_bus;
1471 struct pci_ops *cfg_ops;
1472 u32 func_class;
1473 void *tmp_obj;
1474 char *version;
1475 void __iomem *addr;
1476 int max;
1477
1478 addr = ioremap(offset: dev->hpa.start, size: 4096);
1479 if (addr == NULL)
1480 return -ENOMEM;
1481
1482 /* Read HW Rev First */
1483 func_class = READ_REG32(addr + LBA_FCLASS);
1484
1485 if (IS_ELROY(dev)) {
1486 func_class &= 0xf;
1487 switch (func_class) {
1488 case 0: version = "TR1.0"; break;
1489 case 1: version = "TR2.0"; break;
1490 case 2: version = "TR2.1"; break;
1491 case 3: version = "TR2.2"; break;
1492 case 4: version = "TR3.0"; break;
1493 case 5: version = "TR4.0"; break;
1494 default: version = "TR4+";
1495 }
1496
1497 printk(KERN_INFO "Elroy version %s (0x%x) found at 0x%lx\n",
1498 version, func_class & 0xf, (long)dev->hpa.start);
1499
1500 if (func_class < 2) {
1501 printk(KERN_WARNING "Can't support LBA older than "
1502 "TR2.1 - continuing under adversity.\n");
1503 }
1504
1505#if 0
1506/* Elroy TR4.0 should work with simple algorithm.
1507 But it doesn't. Still missing something. *sigh*
1508*/
1509 if (func_class > 4) {
1510 cfg_ops = &mercury_cfg_ops;
1511 } else
1512#endif
1513 {
1514 cfg_ops = &elroy_cfg_ops;
1515 }
1516
1517 } else if (IS_MERCURY(dev) || IS_QUICKSILVER(dev)) {
1518 int major, minor;
1519
1520 func_class &= 0xff;
1521 major = func_class >> 4, minor = func_class & 0xf;
1522
1523 /* We could use one printk for both Elroy and Mercury,
1524 * but for the mask for func_class.
1525 */
1526 printk(KERN_INFO "%s version TR%d.%d (0x%x) found at 0x%lx\n",
1527 IS_MERCURY(dev) ? "Mercury" : "Quicksilver", major,
1528 minor, func_class, (long)dev->hpa.start);
1529
1530 cfg_ops = &mercury_cfg_ops;
1531 } else {
1532 printk(KERN_ERR "Unknown LBA found at 0x%lx\n",
1533 (long)dev->hpa.start);
1534 return -ENODEV;
1535 }
1536
1537 /* Tell I/O SAPIC driver we have a IRQ handler/region. */
1538 tmp_obj = iosapic_register(dev->hpa.start + LBA_IOSAPIC_BASE,
1539 addr + LBA_IOSAPIC_BASE);
1540
1541 /* NOTE: PCI devices (e.g. 103c:1005 graphics card) which don't
1542 ** have an IRT entry will get NULL back from iosapic code.
1543 */
1544
1545 lba_dev = kzalloc(sizeof(struct lba_device), GFP_KERNEL);
1546 if (!lba_dev) {
1547 printk(KERN_ERR "lba_init_chip - couldn't alloc lba_device\n");
1548 return(1);
1549 }
1550
1551
1552 /* ---------- First : initialize data we already have --------- */
1553
1554 lba_dev->hw_rev = func_class;
1555 lba_dev->hba.base_addr = addr;
1556 lba_dev->hba.dev = dev;
1557 lba_dev->iosapic_obj = tmp_obj; /* save interrupt handle */
1558 lba_dev->hba.iommu = sba_get_iommu(dev); /* get iommu data */
1559 parisc_set_drvdata(dev, lba_dev);
1560
1561 /* ------------ Second : initialize common stuff ---------- */
1562 pci_bios = &lba_bios_ops;
1563 pcibios_register_hba(&lba_dev->hba);
1564 spin_lock_init(&lba_dev->lba_lock);
1565
1566 if (lba_hw_init(d: lba_dev))
1567 return(1);
1568
1569 /* ---------- Third : setup I/O Port and MMIO resources --------- */
1570
1571 if (is_pdc_pat()) {
1572 /* PDC PAT firmware uses PIOP region of GMMIO space. */
1573 pci_port = &lba_pat_port_ops;
1574 /* Go ask PDC PAT what resources this LBA has */
1575 lba_pat_resources(pa_dev: dev, lba_dev);
1576 } else {
1577 if (!astro_iop_base) {
1578 /* Sprockets PDC uses NPIOP region */
1579 astro_iop_base = ioremap(LBA_PORT_BASE, 64 * 1024);
1580 pci_port = &lba_astro_port_ops;
1581 }
1582
1583 /* Poke the chip a bit for /proc output */
1584 lba_legacy_resources(pa_dev: dev, lba_dev);
1585 }
1586
1587 if (lba_dev->hba.bus_num.start < lba_next_bus)
1588 lba_dev->hba.bus_num.start = lba_next_bus;
1589
1590 /* Overlaps with elmmio can (and should) fail here.
1591 * We will prune (or ignore) the distributed range.
1592 *
1593 * FIXME: SBA code should register all elmmio ranges first.
1594 * that would take care of elmmio ranges routed
1595 * to a different rope (already discovered) from
1596 * getting registered *after* LBA code has already
1597 * registered it's distributed lmmio range.
1598 */
1599 if (truncate_pat_collision(root: &iomem_resource,
1600 new: &(lba_dev->hba.lmmio_space))) {
1601 printk(KERN_WARNING "LBA: lmmio_space [%lx/%lx] duplicate!\n",
1602 (long)lba_dev->hba.lmmio_space.start,
1603 (long)lba_dev->hba.lmmio_space.end);
1604 lba_dev->hba.lmmio_space.flags = 0;
1605 }
1606
1607 pci_add_resource_offset(resources: &resources, res: &lba_dev->hba.io_space,
1608 offset: HBA_PORT_BASE(lba_dev->hba.hba_num));
1609 if (lba_dev->hba.elmmio_space.flags)
1610 pci_add_resource_offset(resources: &resources, res: &lba_dev->hba.elmmio_space,
1611 offset: lba_dev->hba.lmmio_space_offset);
1612 if (lba_dev->hba.lmmio_space.flags)
1613 pci_add_resource_offset(resources: &resources, res: &lba_dev->hba.lmmio_space,
1614 offset: lba_dev->hba.lmmio_space_offset);
1615 if (lba_dev->hba.gmmio_space.flags) {
1616 /* Not registering GMMIO space - according to docs it's not
1617 * even used on HP-UX. */
1618 /* pci_add_resource(&resources, &lba_dev->hba.gmmio_space); */
1619 }
1620
1621 pci_add_resource(resources: &resources, res: &lba_dev->hba.bus_num);
1622
1623 dev->dev.platform_data = lba_dev;
1624 lba_bus = lba_dev->hba.hba_bus =
1625 pci_create_root_bus(parent: &dev->dev, bus: lba_dev->hba.bus_num.start,
1626 ops: cfg_ops, NULL, resources: &resources);
1627 if (!lba_bus) {
1628 pci_free_resource_list(resources: &resources);
1629 return 0;
1630 }
1631
1632 max = pci_scan_child_bus(bus: lba_bus);
1633
1634 /* This is in lieu of calling pci_assign_unassigned_resources() */
1635 if (is_pdc_pat()) {
1636 /* assign resources to un-initialized devices */
1637
1638 DBG_PAT("LBA pci_bus_size_bridges()\n");
1639 pci_bus_size_bridges(bus: lba_bus);
1640
1641 DBG_PAT("LBA pci_bus_assign_resources()\n");
1642 pci_bus_assign_resources(bus: lba_bus);
1643
1644#ifdef DEBUG_LBA_PAT
1645 DBG_PAT("\nLBA PIOP resource tree\n");
1646 lba_dump_res(&lba_dev->hba.io_space, 2);
1647 DBG_PAT("\nLBA LMMIO resource tree\n");
1648 lba_dump_res(&lba_dev->hba.lmmio_space, 2);
1649#endif
1650 }
1651
1652 /*
1653 ** Once PCI register ops has walked the bus, access to config
1654 ** space is restricted. Avoids master aborts on config cycles.
1655 ** Early LBA revs go fatal on *any* master abort.
1656 */
1657 if (cfg_ops == &elroy_cfg_ops) {
1658 lba_dev->flags |= LBA_FLAG_SKIP_PROBE;
1659 }
1660
1661 lba_next_bus = max + 1;
1662 pci_bus_add_devices(bus: lba_bus);
1663
1664 /* Whew! Finally done! Tell services we got this one covered. */
1665 return 0;
1666}
1667
1668static const struct parisc_device_id lba_tbl[] __initconst = {
1669 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, ELROY_HVERS, 0xa },
1670 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, MERCURY_HVERS, 0xa },
1671 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, QUICKSILVER_HVERS, 0xa },
1672 { 0, }
1673};
1674
1675static struct parisc_driver lba_driver __refdata = {
1676 .name = MODULE_NAME,
1677 .id_table = lba_tbl,
1678 .probe = lba_driver_probe,
1679};
1680
1681/*
1682** One time initialization to let the world know the LBA was found.
1683** Must be called exactly once before pci_init().
1684*/
1685static int __init lba_init(void)
1686{
1687 return register_parisc_driver(&lba_driver);
1688}
1689arch_initcall(lba_init);
1690
1691/*
1692** Initialize the IBASE/IMASK registers for LBA (Elroy).
1693** Only called from sba_iommu.c in order to route ranges (MMIO vs DMA).
1694** sba_iommu is responsible for locking (none needed at init time).
1695*/
1696void lba_set_iregs(struct parisc_device *lba, u32 ibase, u32 imask)
1697{
1698 void __iomem * base_addr = ioremap(offset: lba->hpa.start, size: 4096);
1699
1700 imask <<= 2; /* adjust for hints - 2 more bits */
1701
1702 /* Make sure we aren't trying to set bits that aren't writeable. */
1703 WARN_ON((ibase & 0x001fffff) != 0);
1704 WARN_ON((imask & 0x001fffff) != 0);
1705
1706 DBG("%s() ibase 0x%x imask 0x%x\n", __func__, ibase, imask);
1707 WRITE_REG32( imask, base_addr + LBA_IMASK);
1708 WRITE_REG32( ibase, base_addr + LBA_IBASE);
1709 iounmap(addr: base_addr);
1710}
1711
1712
1713/*
1714 * The design of the Diva management card in rp34x0 machines (rp3410, rp3440)
1715 * seems rushed, so that many built-in components simply don't work.
1716 * The following quirks disable the serial AUX port and the built-in ATI RV100
1717 * Radeon 7000 graphics card which both don't have any external connectors and
1718 * thus are useless, and even worse, e.g. the AUX port occupies ttyS0 and as
1719 * such makes those machines the only PARISC machines on which we can't use
1720 * ttyS0 as boot console.
1721 */
1722static void quirk_diva_ati_card(struct pci_dev *dev)
1723{
1724 if (dev->subsystem_vendor != PCI_VENDOR_ID_HP ||
1725 dev->subsystem_device != 0x1292)
1726 return;
1727
1728 dev_info(&dev->dev, "Hiding Diva built-in ATI card");
1729 dev->device = 0;
1730}
1731DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ATI, PCI_DEVICE_ID_ATI_RADEON_QY,
1732 quirk_diva_ati_card);
1733
1734static void quirk_diva_aux_disable(struct pci_dev *dev)
1735{
1736 if (dev->subsystem_vendor != PCI_VENDOR_ID_HP ||
1737 dev->subsystem_device != 0x1291)
1738 return;
1739
1740 dev_info(&dev->dev, "Hiding Diva built-in AUX serial device");
1741 dev->device = 0;
1742}
1743DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_DIVA_AUX,
1744 quirk_diva_aux_disable);
1745
1746static void quirk_tosca_aux_disable(struct pci_dev *dev)
1747{
1748 if (dev->subsystem_vendor != PCI_VENDOR_ID_HP ||
1749 dev->subsystem_device != 0x104a)
1750 return;
1751
1752 dev_info(&dev->dev, "Hiding Tosca secondary built-in AUX serial device");
1753 dev->device = 0;
1754}
1755DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_HP, PCI_DEVICE_ID_HP_DIVA,
1756 quirk_tosca_aux_disable);
1757

source code of linux/drivers/parisc/lba_pci.c