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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2**
3** PCI Lower Bus Adapter (LBA) manager
4**
5** (c) Copyright 1999,2000 Grant Grundler
6** (c) Copyright 1999,2000 Hewlett-Packard Company
7**
8** This program is free software; you can redistribute it and/or modify
9** it under the terms of the GNU General Public License as published by
10** the Free Software Foundation; either version 2 of the License, or
11** (at your option) any later version.
12**
13**
14** This module primarily provides access to PCI bus (config/IOport
15** spaces) on platforms with an SBA/LBA chipset. A/B/C/J/L/N-class
16** with 4 digit model numbers - eg C3000 (and A400...sigh).
17**
18** LBA driver isn't as simple as the Dino driver because:
19** (a) this chip has substantial bug fixes between revisions
20** (Only one Dino bug has a software workaround :^( )
21** (b) has more options which we don't (yet) support (DMA hints, OLARD)
22** (c) IRQ support lives in the I/O SAPIC driver (not with PCI driver)
23** (d) play nicely with both PAT and "Legacy" PA-RISC firmware (PDC).
24** (dino only deals with "Legacy" PDC)
25**
26** LBA driver passes the I/O SAPIC HPA to the I/O SAPIC driver.
27** (I/O SAPIC is integratd in the LBA chip).
28**
29** FIXME: Add support to SBA and LBA drivers for DMA hint sets
30** FIXME: Add support for PCI card hot-plug (OLARD).
31*/
32
33#include <linux/delay.h>
34#include <linux/types.h>
35#include <linux/kernel.h>
36#include <linux/spinlock.h>
37#include <linux/init.h> /* for __init and __devinit */
38#include <linux/pci.h>
39#include <linux/ioport.h>
40#include <linux/slab.h>
41#include <linux/smp_lock.h>
42
43#include <asm/byteorder.h>
44#include <asm/pdc.h>
45#include <asm/pdcpat.h>
46#include <asm/page.h>
47#include <asm/system.h>
48
49#include <asm/hardware.h> /* for register_parisc_driver() stuff */
50#include <asm/parisc-device.h>
51#include <asm/iosapic.h> /* for iosapic_register() */
52#include <asm/io.h> /* read/write stuff */
53
54#undef DEBUG_LBA /* general stuff */
55#undef DEBUG_LBA_PORT /* debug I/O Port access */
56#undef DEBUG_LBA_CFG /* debug Config Space Access (ie PCI Bus walk) */
57#undef DEBUG_LBA_PAT /* debug PCI Resource Mgt code - PDC PAT only */
58
59#undef FBB_SUPPORT /* Fast Back-Back xfers - NOT READY YET */
60
61
62#ifdef DEBUG_LBA
63#define DBG(x...) printk(x)
64#else
65#define DBG(x...)
66#endif
67
68#ifdef DEBUG_LBA_PORT
69#define DBG_PORT(x...) printk(x)
70#else
71#define DBG_PORT(x...)
72#endif
73
74#ifdef DEBUG_LBA_CFG
75#define DBG_CFG(x...) printk(x)
76#else
77#define DBG_CFG(x...)
78#endif
79
80#ifdef DEBUG_LBA_PAT
81#define DBG_PAT(x...) printk(x)
82#else
83#define DBG_PAT(x...)
84#endif
85
86
87/*
88** Config accessor functions only pass in the 8-bit bus number and not
89** the 8-bit "PCI Segment" number. Each LBA will be assigned a PCI bus
90** number based on what firmware wrote into the scratch register.
91**
92** The "secondary" bus number is set to this before calling
93** pci_register_ops(). If any PPB's are present, the scan will
94** discover them and update the "secondary" and "subordinate"
95** fields in the pci_bus structure.
96**
97** Changes in the configuration *may* result in a different
98** bus number for each LBA depending on what firmware does.
99*/
100
101#define MODULE_NAME "LBA"
102
103#define LBA_FUNC_ID 0x0000 /* function id */
104#define LBA_FCLASS 0x0008 /* function class, bist, header, rev... */
105#define LBA_CAPABLE 0x0030 /* capabilities register */
106
107#define LBA_PCI_CFG_ADDR 0x0040 /* poke CFG address here */
108#define LBA_PCI_CFG_DATA 0x0048 /* read or write data here */
109
110#define LBA_PMC_MTLT 0x0050 /* Firmware sets this - read only. */
111#define LBA_FW_SCRATCH 0x0058 /* Firmware writes the PCI bus number here. */
112#define LBA_ERROR_ADDR 0x0070 /* On error, address gets logged here */
113
114#define LBA_ARB_MASK 0x0080 /* bit 0 enable arbitration. PAT/PDC enables */
115#define LBA_ARB_PRI 0x0088 /* firmware sets this. */
116#define LBA_ARB_MODE 0x0090 /* firmware sets this. */
117#define LBA_ARB_MTLT 0x0098 /* firmware sets this. */
118
119#define LBA_MOD_ID 0x0100 /* Module ID. PDC_PAT_CELL reports 4 */
120
121#define LBA_STAT_CTL 0x0108 /* Status & Control */
122#define LBA_BUS_RESET 0x01 /* Deassert PCI Bus Reset Signal */
123#define CLEAR_ERRLOG 0x10 /* "Clear Error Log" cmd */
124#define CLEAR_ERRLOG_ENABLE 0x20 /* "Clear Error Log" Enable */
125#define HF_ENABLE 0x40 /* enable HF mode (default is -1 mode) */
126
127#define LBA_LMMIO_BASE 0x0200 /* < 4GB I/O address range */
128#define LBA_LMMIO_MASK 0x0208
129
130#define LBA_GMMIO_BASE 0x0210 /* > 4GB I/O address range */
131#define LBA_GMMIO_MASK 0x0218
132
133#define LBA_WLMMIO_BASE 0x0220 /* All < 4GB ranges under the same *SBA* */
134#define LBA_WLMMIO_MASK 0x0228
135
136#define LBA_WGMMIO_BASE 0x0230 /* All > 4GB ranges under the same *SBA* */
137#define LBA_WGMMIO_MASK 0x0238
138
139#define LBA_IOS_BASE 0x0240 /* I/O port space for this LBA */
140#define LBA_IOS_MASK 0x0248
141
142#define LBA_ELMMIO_BASE 0x0250 /* Extra LMMIO range */
143#define LBA_ELMMIO_MASK 0x0258
144
145#define LBA_EIOS_BASE 0x0260 /* Extra I/O port space */
146#define LBA_EIOS_MASK 0x0268
147
148#define LBA_GLOBAL_MASK 0x0270 /* Mercury only: Global Address Mask */
149#define LBA_DMA_CTL 0x0278 /* firmware sets this */
150
151#define LBA_IBASE 0x0300 /* SBA DMA support */
152#define LBA_IMASK 0x0308
153
154/* FIXME: ignore DMA Hint stuff until we can measure performance */
155#define LBA_HINT_CFG 0x0310
156#define LBA_HINT_BASE 0x0380 /* 14 registers at every 8 bytes. */
157
158#define LBA_BUS_MODE 0x0620
159
160/* ERROR regs are needed for config cycle kluges */
161#define LBA_ERROR_CONFIG 0x0680
162#define LBA_SMART_MODE 0x20
163#define LBA_ERROR_STATUS 0x0688
164#define LBA_ROPE_CTL 0x06A0
165
166#define LBA_IOSAPIC_BASE 0x800 /* Offset of IRQ logic */
167
168/* non-postable I/O port space, densely packed */
169#define LBA_PORT_BASE (PCI_F_EXTEND | 0xfee00000UL)
Helge Deller8039de12006-01-10 20:35:03 -0500170static void __iomem *astro_iop_base __read_mostly;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171
172#define ELROY_HVERS 0x782
173#define MERCURY_HVERS 0x783
174#define QUICKSILVER_HVERS 0x784
175
176static inline int IS_ELROY(struct parisc_device *d)
177{
178 return (d->id.hversion == ELROY_HVERS);
179}
180
181static inline int IS_MERCURY(struct parisc_device *d)
182{
183 return (d->id.hversion == MERCURY_HVERS);
184}
185
186static inline int IS_QUICKSILVER(struct parisc_device *d)
187{
188 return (d->id.hversion == QUICKSILVER_HVERS);
189}
190
191
192/*
193** lba_device: Per instance Elroy data structure
194*/
195struct lba_device {
196 struct pci_hba_data hba;
197
198 spinlock_t lba_lock;
199 void *iosapic_obj;
200
201#ifdef CONFIG_64BIT
202 void __iomem * iop_base; /* PA_VIEW - for IO port accessor funcs */
203#endif
204
205 int flags; /* state/functionality enabled */
206 int hw_rev; /* HW revision of chip */
207};
208
209
210static u32 lba_t32;
211
212/* lba flags */
213#define LBA_FLAG_SKIP_PROBE 0x10
214
215#define LBA_SKIP_PROBE(d) ((d)->flags & LBA_FLAG_SKIP_PROBE)
216
217
218/* Looks nice and keeps the compiler happy */
219#define LBA_DEV(d) ((struct lba_device *) (d))
220
221
222/*
223** Only allow 8 subsidiary busses per LBA
224** Problem is the PCI bus numbering is globally shared.
225*/
226#define LBA_MAX_NUM_BUSES 8
227
228/************************************
229 * LBA register read and write support
230 *
231 * BE WARNED: register writes are posted.
232 * (ie follow writes which must reach HW with a read)
233 */
234#define READ_U8(addr) __raw_readb(addr)
235#define READ_U16(addr) __raw_readw(addr)
236#define READ_U32(addr) __raw_readl(addr)
237#define WRITE_U8(value, addr) __raw_writeb(value, addr)
238#define WRITE_U16(value, addr) __raw_writew(value, addr)
239#define WRITE_U32(value, addr) __raw_writel(value, addr)
240
241#define READ_REG8(addr) readb(addr)
242#define READ_REG16(addr) readw(addr)
243#define READ_REG32(addr) readl(addr)
244#define READ_REG64(addr) readq(addr)
245#define WRITE_REG8(value, addr) writeb(value, addr)
246#define WRITE_REG16(value, addr) writew(value, addr)
247#define WRITE_REG32(value, addr) writel(value, addr)
248
249
250#define LBA_CFG_TOK(bus,dfn) ((u32) ((bus)<<16 | (dfn)<<8))
251#define LBA_CFG_BUS(tok) ((u8) ((tok)>>16))
252#define LBA_CFG_DEV(tok) ((u8) ((tok)>>11) & 0x1f)
253#define LBA_CFG_FUNC(tok) ((u8) ((tok)>>8 ) & 0x7)
254
255
256/*
257** Extract LBA (Rope) number from HPA
258** REVISIT: 16 ropes for Stretch/Ike?
259*/
260#define ROPES_PER_IOC 8
261#define LBA_NUM(x) ((((unsigned long) x) >> 13) & (ROPES_PER_IOC-1))
262
263
264static void
265lba_dump_res(struct resource *r, int d)
266{
267 int i;
268
269 if (NULL == r)
270 return;
271
272 printk(KERN_DEBUG "(%p)", r->parent);
273 for (i = d; i ; --i) printk(" ");
274 printk(KERN_DEBUG "%p [%lx,%lx]/%lx\n", r, r->start, r->end, r->flags);
275 lba_dump_res(r->child, d+2);
276 lba_dump_res(r->sibling, d);
277}
278
279
280/*
281** LBA rev 2.0, 2.1, 2.2, and 3.0 bus walks require a complex
282** workaround for cfg cycles:
283** -- preserve LBA state
284** -- prevent any DMA from occurring
285** -- turn on smart mode
286** -- probe with config writes before doing config reads
287** -- check ERROR_STATUS
288** -- clear ERROR_STATUS
289** -- restore LBA state
290**
291** The workaround is only used for device discovery.
292*/
293
294static int lba_device_present(u8 bus, u8 dfn, struct lba_device *d)
295{
296 u8 first_bus = d->hba.hba_bus->secondary;
297 u8 last_sub_bus = d->hba.hba_bus->subordinate;
298
299 if ((bus < first_bus) ||
300 (bus > last_sub_bus) ||
301 ((bus - first_bus) >= LBA_MAX_NUM_BUSES)) {
302 return 0;
303 }
304
305 return 1;
306}
307
308
309
310#define LBA_CFG_SETUP(d, tok) { \
311 /* Save contents of error config register. */ \
312 error_config = READ_REG32(d->hba.base_addr + LBA_ERROR_CONFIG); \
313\
314 /* Save contents of status control register. */ \
315 status_control = READ_REG32(d->hba.base_addr + LBA_STAT_CTL); \
316\
317 /* For LBA rev 2.0, 2.1, 2.2, and 3.0, we must disable DMA \
318 ** arbitration for full bus walks. \
319 */ \
320 /* Save contents of arb mask register. */ \
321 arb_mask = READ_REG32(d->hba.base_addr + LBA_ARB_MASK); \
322\
323 /* \
324 * Turn off all device arbitration bits (i.e. everything \
325 * except arbitration enable bit). \
326 */ \
327 WRITE_REG32(0x1, d->hba.base_addr + LBA_ARB_MASK); \
328\
329 /* \
330 * Set the smart mode bit so that master aborts don't cause \
331 * LBA to go into PCI fatal mode (required). \
332 */ \
333 WRITE_REG32(error_config | LBA_SMART_MODE, d->hba.base_addr + LBA_ERROR_CONFIG); \
334}
335
336
337#define LBA_CFG_PROBE(d, tok) { \
338 /* \
339 * Setup Vendor ID write and read back the address register \
340 * to make sure that LBA is the bus master. \
341 */ \
342 WRITE_REG32(tok | PCI_VENDOR_ID, (d)->hba.base_addr + LBA_PCI_CFG_ADDR);\
343 /* \
344 * Read address register to ensure that LBA is the bus master, \
345 * which implies that DMA traffic has stopped when DMA arb is off. \
346 */ \
347 lba_t32 = READ_REG32((d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
348 /* \
349 * Generate a cfg write cycle (will have no affect on \
350 * Vendor ID register since read-only). \
351 */ \
352 WRITE_REG32(~0, (d)->hba.base_addr + LBA_PCI_CFG_DATA); \
353 /* \
354 * Make sure write has completed before proceeding further, \
355 * i.e. before setting clear enable. \
356 */ \
357 lba_t32 = READ_REG32((d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
358}
359
360
361/*
362 * HPREVISIT:
363 * -- Can't tell if config cycle got the error.
364 *
365 * OV bit is broken until rev 4.0, so can't use OV bit and
366 * LBA_ERROR_LOG_ADDR to tell if error belongs to config cycle.
367 *
368 * As of rev 4.0, no longer need the error check.
369 *
370 * -- Even if we could tell, we still want to return -1
371 * for **ANY** error (not just master abort).
372 *
373 * -- Only clear non-fatal errors (we don't want to bring
374 * LBA out of pci-fatal mode).
375 *
376 * Actually, there is still a race in which
377 * we could be clearing a fatal error. We will
378 * live with this during our initial bus walk
379 * until rev 4.0 (no driver activity during
380 * initial bus walk). The initial bus walk
381 * has race conditions concerning the use of
382 * smart mode as well.
383 */
384
385#define LBA_MASTER_ABORT_ERROR 0xc
386#define LBA_FATAL_ERROR 0x10
387
388#define LBA_CFG_MASTER_ABORT_CHECK(d, base, tok, error) { \
389 u32 error_status = 0; \
390 /* \
391 * Set clear enable (CE) bit. Unset by HW when new \
392 * errors are logged -- LBA HW ERS section 14.3.3). \
393 */ \
394 WRITE_REG32(status_control | CLEAR_ERRLOG_ENABLE, base + LBA_STAT_CTL); \
395 error_status = READ_REG32(base + LBA_ERROR_STATUS); \
396 if ((error_status & 0x1f) != 0) { \
397 /* \
398 * Fail the config read request. \
399 */ \
400 error = 1; \
401 if ((error_status & LBA_FATAL_ERROR) == 0) { \
402 /* \
403 * Clear error status (if fatal bit not set) by setting \
404 * clear error log bit (CL). \
405 */ \
406 WRITE_REG32(status_control | CLEAR_ERRLOG, base + LBA_STAT_CTL); \
407 } \
408 } \
409}
410
411#define LBA_CFG_TR4_ADDR_SETUP(d, addr) \
412 WRITE_REG32(((addr) & ~3), (d)->hba.base_addr + LBA_PCI_CFG_ADDR);
413
414#define LBA_CFG_ADDR_SETUP(d, addr) { \
415 WRITE_REG32(((addr) & ~3), (d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
416 /* \
417 * Read address register to ensure that LBA is the bus master, \
418 * which implies that DMA traffic has stopped when DMA arb is off. \
419 */ \
420 lba_t32 = READ_REG32((d)->hba.base_addr + LBA_PCI_CFG_ADDR); \
421}
422
423
424#define LBA_CFG_RESTORE(d, base) { \
425 /* \
426 * Restore status control register (turn off clear enable). \
427 */ \
428 WRITE_REG32(status_control, base + LBA_STAT_CTL); \
429 /* \
430 * Restore error config register (turn off smart mode). \
431 */ \
432 WRITE_REG32(error_config, base + LBA_ERROR_CONFIG); \
433 /* \
434 * Restore arb mask register (reenables DMA arbitration). \
435 */ \
436 WRITE_REG32(arb_mask, base + LBA_ARB_MASK); \
437}
438
439
440
441static unsigned int
442lba_rd_cfg(struct lba_device *d, u32 tok, u8 reg, u32 size)
443{
444 u32 data = ~0U;
445 int error = 0;
446 u32 arb_mask = 0; /* used by LBA_CFG_SETUP/RESTORE */
447 u32 error_config = 0; /* used by LBA_CFG_SETUP/RESTORE */
448 u32 status_control = 0; /* used by LBA_CFG_SETUP/RESTORE */
449
450 LBA_CFG_SETUP(d, tok);
451 LBA_CFG_PROBE(d, tok);
452 LBA_CFG_MASTER_ABORT_CHECK(d, d->hba.base_addr, tok, error);
453 if (!error) {
454 void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
455
456 LBA_CFG_ADDR_SETUP(d, tok | reg);
457 switch (size) {
458 case 1: data = (u32) READ_REG8(data_reg + (reg & 3)); break;
459 case 2: data = (u32) READ_REG16(data_reg+ (reg & 2)); break;
460 case 4: data = READ_REG32(data_reg); break;
461 }
462 }
463 LBA_CFG_RESTORE(d, d->hba.base_addr);
464 return(data);
465}
466
467
468static int elroy_cfg_read(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 *data)
469{
470 struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
471 u32 local_bus = (bus->parent == NULL) ? 0 : bus->secondary;
472 u32 tok = LBA_CFG_TOK(local_bus, devfn);
473 void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
474
475 if ((pos > 255) || (devfn > 255))
476 return -EINVAL;
477
478/* FIXME: B2K/C3600 workaround is always use old method... */
479 /* if (!LBA_SKIP_PROBE(d)) */ {
480 /* original - Generate config cycle on broken elroy
481 with risk we will miss PCI bus errors. */
482 *data = lba_rd_cfg(d, tok, pos, size);
483 DBG_CFG("%s(%x+%2x) -> 0x%x (a)\n", __FUNCTION__, tok, pos, *data);
484 return 0;
485 }
486
487 if (LBA_SKIP_PROBE(d) && !lba_device_present(bus->secondary, devfn, d)) {
488 DBG_CFG("%s(%x+%2x) -> -1 (b)\n", __FUNCTION__, tok, pos);
489 /* either don't want to look or know device isn't present. */
490 *data = ~0U;
491 return(0);
492 }
493
494 /* Basic Algorithm
495 ** Should only get here on fully working LBA rev.
496 ** This is how simple the code should have been.
497 */
498 LBA_CFG_ADDR_SETUP(d, tok | pos);
499 switch(size) {
500 case 1: *data = READ_REG8 (data_reg + (pos & 3)); break;
501 case 2: *data = READ_REG16(data_reg + (pos & 2)); break;
502 case 4: *data = READ_REG32(data_reg); break;
503 }
504 DBG_CFG("%s(%x+%2x) -> 0x%x (c)\n", __FUNCTION__, tok, pos, *data);
505 return 0;
506}
507
508
509static void
510lba_wr_cfg(struct lba_device *d, u32 tok, u8 reg, u32 data, u32 size)
511{
512 int error = 0;
513 u32 arb_mask = 0;
514 u32 error_config = 0;
515 u32 status_control = 0;
516 void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
517
518 LBA_CFG_SETUP(d, tok);
519 LBA_CFG_ADDR_SETUP(d, tok | reg);
520 switch (size) {
521 case 1: WRITE_REG8 (data, data_reg + (reg & 3)); break;
522 case 2: WRITE_REG16(data, data_reg + (reg & 2)); break;
523 case 4: WRITE_REG32(data, data_reg); break;
524 }
525 LBA_CFG_MASTER_ABORT_CHECK(d, d->hba.base_addr, tok, error);
526 LBA_CFG_RESTORE(d, d->hba.base_addr);
527}
528
529
530/*
531 * LBA 4.0 config write code implements non-postable semantics
532 * by doing a read of CONFIG ADDR after the write.
533 */
534
535static int elroy_cfg_write(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 data)
536{
537 struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
538 u32 local_bus = (bus->parent == NULL) ? 0 : bus->secondary;
539 u32 tok = LBA_CFG_TOK(local_bus,devfn);
540
541 if ((pos > 255) || (devfn > 255))
542 return -EINVAL;
543
544 if (!LBA_SKIP_PROBE(d)) {
545 /* Original Workaround */
546 lba_wr_cfg(d, tok, pos, (u32) data, size);
547 DBG_CFG("%s(%x+%2x) = 0x%x (a)\n", __FUNCTION__, tok, pos,data);
548 return 0;
549 }
550
551 if (LBA_SKIP_PROBE(d) && (!lba_device_present(bus->secondary, devfn, d))) {
552 DBG_CFG("%s(%x+%2x) = 0x%x (b)\n", __FUNCTION__, tok, pos,data);
553 return 1; /* New Workaround */
554 }
555
556 DBG_CFG("%s(%x+%2x) = 0x%x (c)\n", __FUNCTION__, tok, pos, data);
557
558 /* Basic Algorithm */
559 LBA_CFG_ADDR_SETUP(d, tok | pos);
560 switch(size) {
561 case 1: WRITE_REG8 (data, d->hba.base_addr + LBA_PCI_CFG_DATA + (pos & 3));
562 break;
563 case 2: WRITE_REG16(data, d->hba.base_addr + LBA_PCI_CFG_DATA + (pos & 2));
564 break;
565 case 4: WRITE_REG32(data, d->hba.base_addr + LBA_PCI_CFG_DATA);
566 break;
567 }
568 /* flush posted write */
569 lba_t32 = READ_REG32(d->hba.base_addr + LBA_PCI_CFG_ADDR);
570 return 0;
571}
572
573
574static struct pci_ops elroy_cfg_ops = {
575 .read = elroy_cfg_read,
576 .write = elroy_cfg_write,
577};
578
579/*
580 * The mercury_cfg_ops are slightly misnamed; they're also used for Elroy
581 * TR4.0 as no additional bugs were found in this areea between Elroy and
582 * Mercury
583 */
584
585static int mercury_cfg_read(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 *data)
586{
587 struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
588 u32 local_bus = (bus->parent == NULL) ? 0 : bus->secondary;
589 u32 tok = LBA_CFG_TOK(local_bus, devfn);
590 void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
591
592 if ((pos > 255) || (devfn > 255))
593 return -EINVAL;
594
595 LBA_CFG_TR4_ADDR_SETUP(d, tok | pos);
596 switch(size) {
597 case 1:
598 *data = READ_REG8(data_reg + (pos & 3));
599 break;
600 case 2:
601 *data = READ_REG16(data_reg + (pos & 2));
602 break;
603 case 4:
604 *data = READ_REG32(data_reg); break;
605 break;
606 }
607
608 DBG_CFG("mercury_cfg_read(%x+%2x) -> 0x%x\n", tok, pos, *data);
609 return 0;
610}
611
612/*
613 * LBA 4.0 config write code implements non-postable semantics
614 * by doing a read of CONFIG ADDR after the write.
615 */
616
617static int mercury_cfg_write(struct pci_bus *bus, unsigned int devfn, int pos, int size, u32 data)
618{
619 struct lba_device *d = LBA_DEV(parisc_walk_tree(bus->bridge));
620 void __iomem *data_reg = d->hba.base_addr + LBA_PCI_CFG_DATA;
621 u32 local_bus = (bus->parent == NULL) ? 0 : bus->secondary;
622 u32 tok = LBA_CFG_TOK(local_bus,devfn);
623
624 if ((pos > 255) || (devfn > 255))
625 return -EINVAL;
626
627 DBG_CFG("%s(%x+%2x) <- 0x%x (c)\n", __FUNCTION__, tok, pos, data);
628
629 LBA_CFG_TR4_ADDR_SETUP(d, tok | pos);
630 switch(size) {
631 case 1:
632 WRITE_REG8 (data, data_reg + (pos & 3));
633 break;
634 case 2:
635 WRITE_REG16(data, data_reg + (pos & 2));
636 break;
637 case 4:
638 WRITE_REG32(data, data_reg);
639 break;
640 }
641
642 /* flush posted write */
643 lba_t32 = READ_U32(d->hba.base_addr + LBA_PCI_CFG_ADDR);
644 return 0;
645}
646
647static struct pci_ops mercury_cfg_ops = {
648 .read = mercury_cfg_read,
649 .write = mercury_cfg_write,
650};
651
652
653static void
654lba_bios_init(void)
655{
656 DBG(MODULE_NAME ": lba_bios_init\n");
657}
658
659
660#ifdef CONFIG_64BIT
661
662/*
663** Determine if a device is already configured.
664** If so, reserve it resources.
665**
666** Read PCI cfg command register and see if I/O or MMIO is enabled.
667** PAT has to enable the devices it's using.
668**
669** Note: resources are fixed up before we try to claim them.
670*/
671static void
672lba_claim_dev_resources(struct pci_dev *dev)
673{
674 u16 cmd;
675 int i, srch_flags;
676
677 (void) pci_read_config_word(dev, PCI_COMMAND, &cmd);
678
679 srch_flags = (cmd & PCI_COMMAND_IO) ? IORESOURCE_IO : 0;
680 if (cmd & PCI_COMMAND_MEMORY)
681 srch_flags |= IORESOURCE_MEM;
682
683 if (!srch_flags)
684 return;
685
686 for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
687 if (dev->resource[i].flags & srch_flags) {
688 pci_claim_resource(dev, i);
689 DBG(" claimed %s %d [%lx,%lx]/%lx\n",
690 pci_name(dev), i,
691 dev->resource[i].start,
692 dev->resource[i].end,
693 dev->resource[i].flags
694 );
695 }
696 }
697}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698
699
700/*
Grant Grundler6ca45a22006-01-10 20:47:56 -0500701 * truncate_pat_collision: Deal with overlaps or outright collisions
702 * between PAT PDC reported ranges.
703 *
704 * Broken PA8800 firmware will report lmmio range that
705 * overlaps with CPU HPA. Just truncate the lmmio range.
706 *
707 * BEWARE: conflicts with this lmmio range may be an
708 * elmmio range which is pointing down another rope.
709 *
710 * FIXME: only deals with one collision per range...theoretically we
711 * could have several. Supporting more than one collision will get messy.
712 */
713static unsigned long
714truncate_pat_collision(struct resource *root, struct resource *new)
715{
716 unsigned long start = new->start;
717 unsigned long end = new->end;
718 struct resource *tmp = root->child;
719
720 if (end <= start || start < root->start || !tmp)
721 return 0;
722
723 /* find first overlap */
724 while (tmp && tmp->end < start)
725 tmp = tmp->sibling;
726
727 /* no entries overlap */
728 if (!tmp) return 0;
729
730 /* found one that starts behind the new one
731 ** Don't need to do anything.
732 */
733 if (tmp->start >= end) return 0;
734
735 if (tmp->start <= start) {
736 /* "front" of new one overlaps */
737 new->start = tmp->end + 1;
738
739 if (tmp->end >= end) {
740 /* AACCKK! totally overlaps! drop this range. */
741 return 1;
742 }
743 }
744
745 if (tmp->end < end ) {
746 /* "end" of new one overlaps */
747 new->end = tmp->start - 1;
748 }
749
750 printk(KERN_WARNING "LBA: Truncating lmmio_space [%lx/%lx] "
751 "to [%lx,%lx]\n",
752 start, end,
753 new->start, new->end );
754
755 return 0; /* truncation successful */
756}
757
758#else
759#define lba_claim_dev_resources(dev) do { } while (0)
760#define truncate_pat_collision(r,n) (0)
761#endif
762
763/*
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764** The algorithm is generic code.
765** But it needs to access local data structures to get the IRQ base.
766** Could make this a "pci_fixup_irq(bus, region)" but not sure
767** it's worth it.
768**
769** Called by do_pci_scan_bus() immediately after each PCI bus is walked.
770** Resources aren't allocated until recursive buswalk below HBA is completed.
771*/
772static void
773lba_fixup_bus(struct pci_bus *bus)
774{
775 struct list_head *ln;
776#ifdef FBB_SUPPORT
777 u16 status;
778#endif
779 struct lba_device *ldev = LBA_DEV(parisc_walk_tree(bus->bridge));
780 int lba_portbase = HBA_PORT_BASE(ldev->hba.hba_num);
781
782 DBG("lba_fixup_bus(0x%p) bus %d platform_data 0x%p\n",
783 bus, bus->secondary, bus->bridge->platform_data);
784
785 /*
786 ** Properly Setup MMIO resources for this bus.
787 ** pci_alloc_primary_bus() mangles this.
788 */
789 if (bus->self) {
790 /* PCI-PCI Bridge */
791 pci_read_bridge_bases(bus);
792 } else {
793 /* Host-PCI Bridge */
794 int err, i;
795
796 DBG("lba_fixup_bus() %s [%lx/%lx]/%lx\n",
797 ldev->hba.io_space.name,
798 ldev->hba.io_space.start, ldev->hba.io_space.end,
799 ldev->hba.io_space.flags);
800 DBG("lba_fixup_bus() %s [%lx/%lx]/%lx\n",
801 ldev->hba.lmmio_space.name,
802 ldev->hba.lmmio_space.start, ldev->hba.lmmio_space.end,
803 ldev->hba.lmmio_space.flags);
804
805 err = request_resource(&ioport_resource, &(ldev->hba.io_space));
806 if (err < 0) {
807 lba_dump_res(&ioport_resource, 2);
808 BUG();
809 }
Grant Grundler6ca45a22006-01-10 20:47:56 -0500810 /* advertize Host bridge resources to PCI bus */
811 bus->resource[0] = &(ldev->hba.io_space);
812 i = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813
814 if (ldev->hba.elmmio_space.start) {
815 err = request_resource(&iomem_resource,
816 &(ldev->hba.elmmio_space));
817 if (err < 0) {
818
819 printk("FAILED: lba_fixup_bus() request for "
820 "elmmio_space [%lx/%lx]\n",
821 ldev->hba.elmmio_space.start,
822 ldev->hba.elmmio_space.end);
823
824 /* lba_dump_res(&iomem_resource, 2); */
825 /* BUG(); */
Grant Grundler6ca45a22006-01-10 20:47:56 -0500826 } else
827 bus->resource[i++] = &(ldev->hba.elmmio_space);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 }
829
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830
Grant Grundler6ca45a22006-01-10 20:47:56 -0500831 /* Overlaps with elmmio can (and should) fail here.
832 * We will prune (or ignore) the distributed range.
833 *
834 * FIXME: SBA code should register all elmmio ranges first.
835 * that would take care of elmmio ranges routed
836 * to a different rope (already discovered) from
837 * getting registered *after* LBA code has already
838 * registered it's distributed lmmio range.
839 */
840 if (truncate_pat_collision(&iomem_resource,
841 &(ldev->hba.lmmio_space))) {
842
843 printk(KERN_WARNING "LBA: lmmio_space [%lx/%lx] duplicate!\n",
844 ldev->hba.lmmio_space.start,
845 ldev->hba.lmmio_space.end);
846 } else {
847 err = request_resource(&iomem_resource, &(ldev->hba.lmmio_space));
848 if (err < 0) {
849 printk(KERN_ERR "FAILED: lba_fixup_bus() request for "
Linus Torvalds1da177e2005-04-16 15:20:36 -0700850 "lmmio_space [%lx/%lx]\n",
851 ldev->hba.lmmio_space.start,
852 ldev->hba.lmmio_space.end);
Grant Grundler6ca45a22006-01-10 20:47:56 -0500853 } else
854 bus->resource[i++] = &(ldev->hba.lmmio_space);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700855 }
856
857#ifdef CONFIG_64BIT
858 /* GMMIO is distributed range. Every LBA/Rope gets part it. */
859 if (ldev->hba.gmmio_space.flags) {
860 err = request_resource(&iomem_resource, &(ldev->hba.gmmio_space));
861 if (err < 0) {
862 printk("FAILED: lba_fixup_bus() request for "
863 "gmmio_space [%lx/%lx]\n",
864 ldev->hba.gmmio_space.start,
865 ldev->hba.gmmio_space.end);
866 lba_dump_res(&iomem_resource, 2);
867 BUG();
868 }
Grant Grundler6ca45a22006-01-10 20:47:56 -0500869 bus->resource[i++] = &(ldev->hba.gmmio_space);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700870 }
871#endif
872
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 }
874
875 list_for_each(ln, &bus->devices) {
876 int i;
877 struct pci_dev *dev = pci_dev_b(ln);
878
879 DBG("lba_fixup_bus() %s\n", pci_name(dev));
880
881 /* Virtualize Device/Bridge Resources. */
882 for (i = 0; i < PCI_BRIDGE_RESOURCES; i++) {
883 struct resource *res = &dev->resource[i];
884
885 /* If resource not allocated - skip it */
886 if (!res->start)
887 continue;
888
889 if (res->flags & IORESOURCE_IO) {
890 DBG("lba_fixup_bus() I/O Ports [%lx/%lx] -> ",
891 res->start, res->end);
892 res->start |= lba_portbase;
893 res->end |= lba_portbase;
894 DBG("[%lx/%lx]\n", res->start, res->end);
895 } else if (res->flags & IORESOURCE_MEM) {
896 /*
897 ** Convert PCI (IO_VIEW) addresses to
898 ** processor (PA_VIEW) addresses
899 */
900 DBG("lba_fixup_bus() MMIO [%lx/%lx] -> ",
901 res->start, res->end);
902 res->start = PCI_HOST_ADDR(HBA_DATA(ldev), res->start);
903 res->end = PCI_HOST_ADDR(HBA_DATA(ldev), res->end);
904 DBG("[%lx/%lx]\n", res->start, res->end);
905 } else {
906 DBG("lba_fixup_bus() WTF? 0x%lx [%lx/%lx] XXX",
907 res->flags, res->start, res->end);
908 }
909 }
910
911#ifdef FBB_SUPPORT
912 /*
913 ** If one device does not support FBB transfers,
914 ** No one on the bus can be allowed to use them.
915 */
916 (void) pci_read_config_word(dev, PCI_STATUS, &status);
917 bus->bridge_ctl &= ~(status & PCI_STATUS_FAST_BACK);
918#endif
919
920 if (is_pdc_pat()) {
921 /* Claim resources for PDC's devices */
922 lba_claim_dev_resources(dev);
923 }
924
925 /*
926 ** P2PB's have no IRQs. ignore them.
927 */
928 if ((dev->class >> 8) == PCI_CLASS_BRIDGE_PCI)
929 continue;
930
931 /* Adjust INTERRUPT_LINE for this dev */
932 iosapic_fixup_irq(ldev->iosapic_obj, dev);
933 }
934
935#ifdef FBB_SUPPORT
936/* FIXME/REVISIT - finish figuring out to set FBB on both
937** pci_setup_bridge() clobbers PCI_BRIDGE_CONTROL.
938** Can't fixup here anyway....garr...
939*/
940 if (fbb_enable) {
941 if (bus->self) {
942 u8 control;
943 /* enable on PPB */
944 (void) pci_read_config_byte(bus->self, PCI_BRIDGE_CONTROL, &control);
945 (void) pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, control | PCI_STATUS_FAST_BACK);
946
947 } else {
948 /* enable on LBA */
949 }
950 fbb_enable = PCI_COMMAND_FAST_BACK;
951 }
952
953 /* Lastly enable FBB/PERR/SERR on all devices too */
954 list_for_each(ln, &bus->devices) {
955 (void) pci_read_config_word(dev, PCI_COMMAND, &status);
956 status |= PCI_COMMAND_PARITY | PCI_COMMAND_SERR | fbb_enable;
957 (void) pci_write_config_word(dev, PCI_COMMAND, status);
958 }
959#endif
960}
961
962
963struct pci_bios_ops lba_bios_ops = {
964 .init = lba_bios_init,
965 .fixup_bus = lba_fixup_bus,
966};
967
968
969
970
971/*******************************************************
972**
973** LBA Sprockets "I/O Port" Space Accessor Functions
974**
975** This set of accessor functions is intended for use with
976** "legacy firmware" (ie Sprockets on Allegro/Forte boxes).
977**
978** Many PCI devices don't require use of I/O port space (eg Tulip,
979** NCR720) since they export the same registers to both MMIO and
980** I/O port space. In general I/O port space is slower than
981** MMIO since drivers are designed so PIO writes can be posted.
982**
983********************************************************/
984
985#define LBA_PORT_IN(size, mask) \
986static u##size lba_astro_in##size (struct pci_hba_data *d, u16 addr) \
987{ \
988 u##size t; \
989 t = READ_REG##size(astro_iop_base + addr); \
990 DBG_PORT(" 0x%x\n", t); \
991 return (t); \
992}
993
994LBA_PORT_IN( 8, 3)
995LBA_PORT_IN(16, 2)
996LBA_PORT_IN(32, 0)
997
998
999
1000/*
1001** BUG X4107: Ordering broken - DMA RD return can bypass PIO WR
1002**
1003** Fixed in Elroy 2.2. The READ_U32(..., LBA_FUNC_ID) below is
1004** guarantee non-postable completion semantics - not avoid X4107.
1005** The READ_U32 only guarantees the write data gets to elroy but
1006** out to the PCI bus. We can't read stuff from I/O port space
1007** since we don't know what has side-effects. Attempting to read
1008** from configuration space would be suicidal given the number of
1009** bugs in that elroy functionality.
1010**
1011** Description:
1012** DMA read results can improperly pass PIO writes (X4107). The
1013** result of this bug is that if a processor modifies a location in
1014** memory after having issued PIO writes, the PIO writes are not
1015** guaranteed to be completed before a PCI device is allowed to see
1016** the modified data in a DMA read.
1017**
1018** Note that IKE bug X3719 in TR1 IKEs will result in the same
1019** symptom.
1020**
1021** Workaround:
1022** The workaround for this bug is to always follow a PIO write with
1023** a PIO read to the same bus before starting DMA on that PCI bus.
1024**
1025*/
1026#define LBA_PORT_OUT(size, mask) \
1027static void lba_astro_out##size (struct pci_hba_data *d, u16 addr, u##size val) \
1028{ \
1029 DBG_PORT("%s(0x%p, 0x%x, 0x%x)\n", __FUNCTION__, d, addr, val); \
1030 WRITE_REG##size(val, astro_iop_base + addr); \
1031 if (LBA_DEV(d)->hw_rev < 3) \
1032 lba_t32 = READ_U32(d->base_addr + LBA_FUNC_ID); \
1033}
1034
1035LBA_PORT_OUT( 8, 3)
1036LBA_PORT_OUT(16, 2)
1037LBA_PORT_OUT(32, 0)
1038
1039
1040static struct pci_port_ops lba_astro_port_ops = {
1041 .inb = lba_astro_in8,
1042 .inw = lba_astro_in16,
1043 .inl = lba_astro_in32,
1044 .outb = lba_astro_out8,
1045 .outw = lba_astro_out16,
1046 .outl = lba_astro_out32
1047};
1048
1049
1050#ifdef CONFIG_64BIT
1051#define PIOP_TO_GMMIO(lba, addr) \
1052 ((lba)->iop_base + (((addr)&0xFFFC)<<10) + ((addr)&3))
1053
1054/*******************************************************
1055**
1056** LBA PAT "I/O Port" Space Accessor Functions
1057**
1058** This set of accessor functions is intended for use with
1059** "PAT PDC" firmware (ie Prelude/Rhapsody/Piranha boxes).
1060**
1061** This uses the PIOP space located in the first 64MB of GMMIO.
1062** Each rope gets a full 64*KB* (ie 4 bytes per page) this way.
1063** bits 1:0 stay the same. bits 15:2 become 25:12.
1064** Then add the base and we can generate an I/O Port cycle.
1065********************************************************/
1066#undef LBA_PORT_IN
1067#define LBA_PORT_IN(size, mask) \
1068static u##size lba_pat_in##size (struct pci_hba_data *l, u16 addr) \
1069{ \
1070 u##size t; \
1071 DBG_PORT("%s(0x%p, 0x%x) ->", __FUNCTION__, l, addr); \
1072 t = READ_REG##size(PIOP_TO_GMMIO(LBA_DEV(l), addr)); \
1073 DBG_PORT(" 0x%x\n", t); \
1074 return (t); \
1075}
1076
1077LBA_PORT_IN( 8, 3)
1078LBA_PORT_IN(16, 2)
1079LBA_PORT_IN(32, 0)
1080
1081
1082#undef LBA_PORT_OUT
1083#define LBA_PORT_OUT(size, mask) \
1084static void lba_pat_out##size (struct pci_hba_data *l, u16 addr, u##size val) \
1085{ \
1086 void *where = (void *) PIOP_TO_GMMIO(LBA_DEV(l), addr); \
1087 DBG_PORT("%s(0x%p, 0x%x, 0x%x)\n", __FUNCTION__, l, addr, val); \
1088 WRITE_REG##size(val, where); \
1089 /* flush the I/O down to the elroy at least */ \
1090 lba_t32 = READ_U32(l->base_addr + LBA_FUNC_ID); \
1091}
1092
1093LBA_PORT_OUT( 8, 3)
1094LBA_PORT_OUT(16, 2)
1095LBA_PORT_OUT(32, 0)
1096
1097
1098static struct pci_port_ops lba_pat_port_ops = {
1099 .inb = lba_pat_in8,
1100 .inw = lba_pat_in16,
1101 .inl = lba_pat_in32,
1102 .outb = lba_pat_out8,
1103 .outw = lba_pat_out16,
1104 .outl = lba_pat_out32
1105};
1106
1107
1108
1109/*
1110** make range information from PDC available to PCI subsystem.
1111** We make the PDC call here in order to get the PCI bus range
1112** numbers. The rest will get forwarded in pcibios_fixup_bus().
1113** We don't have a struct pci_bus assigned to us yet.
1114*/
1115static void
1116lba_pat_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev)
1117{
1118 unsigned long bytecnt;
1119 pdc_pat_cell_mod_maddr_block_t pa_pdc_cell; /* PA_VIEW */
1120 pdc_pat_cell_mod_maddr_block_t io_pdc_cell; /* IO_VIEW */
1121 long io_count;
1122 long status; /* PDC return status */
1123 long pa_count;
1124 int i;
1125
1126 /* return cell module (IO view) */
1127 status = pdc_pat_cell_module(&bytecnt, pa_dev->pcell_loc, pa_dev->mod_index,
1128 PA_VIEW, & pa_pdc_cell);
1129 pa_count = pa_pdc_cell.mod[1];
1130
1131 status |= pdc_pat_cell_module(&bytecnt, pa_dev->pcell_loc, pa_dev->mod_index,
1132 IO_VIEW, &io_pdc_cell);
1133 io_count = io_pdc_cell.mod[1];
1134
1135 /* We've already done this once for device discovery...*/
1136 if (status != PDC_OK) {
1137 panic("pdc_pat_cell_module() call failed for LBA!\n");
1138 }
1139
1140 if (PAT_GET_ENTITY(pa_pdc_cell.mod_info) != PAT_ENTITY_LBA) {
1141 panic("pdc_pat_cell_module() entity returned != PAT_ENTITY_LBA!\n");
1142 }
1143
1144 /*
1145 ** Inspect the resources PAT tells us about
1146 */
1147 for (i = 0; i < pa_count; i++) {
1148 struct {
1149 unsigned long type;
1150 unsigned long start;
1151 unsigned long end; /* aka finish */
1152 } *p, *io;
1153 struct resource *r;
1154
1155 p = (void *) &(pa_pdc_cell.mod[2+i*3]);
1156 io = (void *) &(io_pdc_cell.mod[2+i*3]);
1157
1158 /* Convert the PAT range data to PCI "struct resource" */
1159 switch(p->type & 0xff) {
1160 case PAT_PBNUM:
1161 lba_dev->hba.bus_num.start = p->start;
1162 lba_dev->hba.bus_num.end = p->end;
1163 break;
1164
1165 case PAT_LMMIO:
1166 /* used to fix up pre-initialized MEM BARs */
1167 if (!lba_dev->hba.lmmio_space.start) {
1168 sprintf(lba_dev->hba.lmmio_name,
1169 "PCI%02lx LMMIO",
1170 lba_dev->hba.bus_num.start);
1171 lba_dev->hba.lmmio_space_offset = p->start -
1172 io->start;
1173 r = &lba_dev->hba.lmmio_space;
1174 r->name = lba_dev->hba.lmmio_name;
1175 } else if (!lba_dev->hba.elmmio_space.start) {
1176 sprintf(lba_dev->hba.elmmio_name,
1177 "PCI%02lx ELMMIO",
1178 lba_dev->hba.bus_num.start);
1179 r = &lba_dev->hba.elmmio_space;
1180 r->name = lba_dev->hba.elmmio_name;
1181 } else {
1182 printk(KERN_WARNING MODULE_NAME
1183 " only supports 2 LMMIO resources!\n");
1184 break;
1185 }
1186
1187 r->start = p->start;
1188 r->end = p->end;
1189 r->flags = IORESOURCE_MEM;
1190 r->parent = r->sibling = r->child = NULL;
1191 break;
1192
1193 case PAT_GMMIO:
1194 /* MMIO space > 4GB phys addr; for 64-bit BAR */
1195 sprintf(lba_dev->hba.gmmio_name, "PCI%02lx GMMIO",
1196 lba_dev->hba.bus_num.start);
1197 r = &lba_dev->hba.gmmio_space;
1198 r->name = lba_dev->hba.gmmio_name;
1199 r->start = p->start;
1200 r->end = p->end;
1201 r->flags = IORESOURCE_MEM;
1202 r->parent = r->sibling = r->child = NULL;
1203 break;
1204
1205 case PAT_NPIOP:
1206 printk(KERN_WARNING MODULE_NAME
1207 " range[%d] : ignoring NPIOP (0x%lx)\n",
1208 i, p->start);
1209 break;
1210
1211 case PAT_PIOP:
1212 /*
1213 ** Postable I/O port space is per PCI host adapter.
1214 ** base of 64MB PIOP region
1215 */
1216 lba_dev->iop_base = ioremap(p->start, 64 * 1024 * 1024);
1217
1218 sprintf(lba_dev->hba.io_name, "PCI%02lx Ports",
1219 lba_dev->hba.bus_num.start);
1220 r = &lba_dev->hba.io_space;
1221 r->name = lba_dev->hba.io_name;
1222 r->start = HBA_PORT_BASE(lba_dev->hba.hba_num);
1223 r->end = r->start + HBA_PORT_SPACE_SIZE - 1;
1224 r->flags = IORESOURCE_IO;
1225 r->parent = r->sibling = r->child = NULL;
1226 break;
1227
1228 default:
1229 printk(KERN_WARNING MODULE_NAME
1230 " range[%d] : unknown pat range type (0x%lx)\n",
1231 i, p->type & 0xff);
1232 break;
1233 }
1234 }
1235}
1236#else
1237/* keep compiler from complaining about missing declarations */
1238#define lba_pat_port_ops lba_astro_port_ops
1239#define lba_pat_resources(pa_dev, lba_dev)
1240#endif /* CONFIG_64BIT */
1241
1242
1243extern void sba_distributed_lmmio(struct parisc_device *, struct resource *);
1244extern void sba_directed_lmmio(struct parisc_device *, struct resource *);
1245
1246
1247static void
1248lba_legacy_resources(struct parisc_device *pa_dev, struct lba_device *lba_dev)
1249{
1250 struct resource *r;
1251 int lba_num;
1252
1253 lba_dev->hba.lmmio_space_offset = PCI_F_EXTEND;
1254
1255 /*
1256 ** With "legacy" firmware, the lowest byte of FW_SCRATCH
1257 ** represents bus->secondary and the second byte represents
1258 ** bus->subsidiary (i.e. highest PPB programmed by firmware).
1259 ** PCI bus walk *should* end up with the same result.
1260 ** FIXME: But we don't have sanity checks in PCI or LBA.
1261 */
1262 lba_num = READ_REG32(lba_dev->hba.base_addr + LBA_FW_SCRATCH);
1263 r = &(lba_dev->hba.bus_num);
1264 r->name = "LBA PCI Busses";
1265 r->start = lba_num & 0xff;
1266 r->end = (lba_num>>8) & 0xff;
1267
1268 /* Set up local PCI Bus resources - we don't need them for
1269 ** Legacy boxes but it's nice to see in /proc/iomem.
1270 */
1271 r = &(lba_dev->hba.lmmio_space);
1272 sprintf(lba_dev->hba.lmmio_name, "PCI%02lx LMMIO",
1273 lba_dev->hba.bus_num.start);
1274 r->name = lba_dev->hba.lmmio_name;
1275
1276#if 1
1277 /* We want the CPU -> IO routing of addresses.
1278 * The SBA BASE/MASK registers control CPU -> IO routing.
1279 * Ask SBA what is routed to this rope/LBA.
1280 */
1281 sba_distributed_lmmio(pa_dev, r);
1282#else
1283 /*
1284 * The LBA BASE/MASK registers control IO -> System routing.
1285 *
1286 * The following code works but doesn't get us what we want.
1287 * Well, only because firmware (v5.0) on C3000 doesn't program
1288 * the LBA BASE/MASE registers to be the exact inverse of
1289 * the corresponding SBA registers. Other Astro/Pluto
1290 * based platform firmware may do it right.
1291 *
1292 * Should someone want to mess with MSI, they may need to
1293 * reprogram LBA BASE/MASK registers. Thus preserve the code
1294 * below until MSI is known to work on C3000/A500/N4000/RP3440.
1295 *
1296 * Using the code below, /proc/iomem shows:
1297 * ...
1298 * f0000000-f0ffffff : PCI00 LMMIO
1299 * f05d0000-f05d0000 : lcd_data
1300 * f05d0008-f05d0008 : lcd_cmd
1301 * f1000000-f1ffffff : PCI01 LMMIO
1302 * f4000000-f4ffffff : PCI02 LMMIO
1303 * f4000000-f4001fff : sym53c8xx
1304 * f4002000-f4003fff : sym53c8xx
1305 * f4004000-f40043ff : sym53c8xx
1306 * f4005000-f40053ff : sym53c8xx
1307 * f4007000-f4007fff : ohci_hcd
1308 * f4008000-f40083ff : tulip
1309 * f6000000-f6ffffff : PCI03 LMMIO
1310 * f8000000-fbffffff : PCI00 ELMMIO
1311 * fa100000-fa4fffff : stifb mmio
1312 * fb000000-fb1fffff : stifb fb
1313 *
1314 * But everything listed under PCI02 actually lives under PCI00.
1315 * This is clearly wrong.
1316 *
1317 * Asking SBA how things are routed tells the correct story:
1318 * LMMIO_BASE/MASK/ROUTE f4000001 fc000000 00000000
1319 * DIR0_BASE/MASK/ROUTE fa000001 fe000000 00000006
1320 * DIR1_BASE/MASK/ROUTE f9000001 ff000000 00000004
1321 * DIR2_BASE/MASK/ROUTE f0000000 fc000000 00000000
1322 * DIR3_BASE/MASK/ROUTE f0000000 fc000000 00000000
1323 *
1324 * Which looks like this in /proc/iomem:
1325 * f4000000-f47fffff : PCI00 LMMIO
1326 * f4000000-f4001fff : sym53c8xx
1327 * ...[deteled core devices - same as above]...
1328 * f4008000-f40083ff : tulip
1329 * f4800000-f4ffffff : PCI01 LMMIO
1330 * f6000000-f67fffff : PCI02 LMMIO
1331 * f7000000-f77fffff : PCI03 LMMIO
1332 * f9000000-f9ffffff : PCI02 ELMMIO
1333 * fa000000-fbffffff : PCI03 ELMMIO
1334 * fa100000-fa4fffff : stifb mmio
1335 * fb000000-fb1fffff : stifb fb
1336 *
1337 * ie all Built-in core are under now correctly under PCI00.
1338 * The "PCI02 ELMMIO" directed range is for:
1339 * +-[02]---03.0 3Dfx Interactive, Inc. Voodoo 2
1340 *
1341 * All is well now.
1342 */
1343 r->start = READ_REG32(lba_dev->hba.base_addr + LBA_LMMIO_BASE);
1344 if (r->start & 1) {
1345 unsigned long rsize;
1346
1347 r->flags = IORESOURCE_MEM;
1348 /* mmio_mask also clears Enable bit */
1349 r->start &= mmio_mask;
1350 r->start = PCI_HOST_ADDR(HBA_DATA(lba_dev), r->start);
1351 rsize = ~ READ_REG32(lba_dev->hba.base_addr + LBA_LMMIO_MASK);
1352
1353 /*
1354 ** Each rope only gets part of the distributed range.
1355 ** Adjust "window" for this rope.
1356 */
1357 rsize /= ROPES_PER_IOC;
Matthew Wilcox53f01bb2005-10-21 22:36:40 -04001358 r->start += (rsize + 1) * LBA_NUM(pa_dev->hpa.start);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001359 r->end = r->start + rsize;
1360 } else {
1361 r->end = r->start = 0; /* Not enabled. */
1362 }
1363#endif
1364
1365 /*
1366 ** "Directed" ranges are used when the "distributed range" isn't
1367 ** sufficient for all devices below a given LBA. Typically devices
1368 ** like graphics cards or X25 may need a directed range when the
1369 ** bus has multiple slots (ie multiple devices) or the device
1370 ** needs more than the typical 4 or 8MB a distributed range offers.
1371 **
1372 ** The main reason for ignoring it now frigging complications.
1373 ** Directed ranges may overlap (and have precedence) over
1374 ** distributed ranges. Or a distributed range assigned to a unused
1375 ** rope may be used by a directed range on a different rope.
1376 ** Support for graphics devices may require fixing this
1377 ** since they may be assigned a directed range which overlaps
1378 ** an existing (but unused portion of) distributed range.
1379 */
1380 r = &(lba_dev->hba.elmmio_space);
1381 sprintf(lba_dev->hba.elmmio_name, "PCI%02lx ELMMIO",
1382 lba_dev->hba.bus_num.start);
1383 r->name = lba_dev->hba.elmmio_name;
1384
1385#if 1
1386 /* See comment which precedes call to sba_directed_lmmio() */
1387 sba_directed_lmmio(pa_dev, r);
1388#else
1389 r->start = READ_REG32(lba_dev->hba.base_addr + LBA_ELMMIO_BASE);
1390
1391 if (r->start & 1) {
1392 unsigned long rsize;
1393 r->flags = IORESOURCE_MEM;
1394 /* mmio_mask also clears Enable bit */
1395 r->start &= mmio_mask;
1396 r->start = PCI_HOST_ADDR(HBA_DATA(lba_dev), r->start);
1397 rsize = READ_REG32(lba_dev->hba.base_addr + LBA_ELMMIO_MASK);
1398 r->end = r->start + ~rsize;
1399 }
1400#endif
1401
1402 r = &(lba_dev->hba.io_space);
1403 sprintf(lba_dev->hba.io_name, "PCI%02lx Ports",
1404 lba_dev->hba.bus_num.start);
1405 r->name = lba_dev->hba.io_name;
1406 r->flags = IORESOURCE_IO;
1407 r->start = READ_REG32(lba_dev->hba.base_addr + LBA_IOS_BASE) & ~1L;
1408 r->end = r->start + (READ_REG32(lba_dev->hba.base_addr + LBA_IOS_MASK) ^ (HBA_PORT_SPACE_SIZE - 1));
1409
1410 /* Virtualize the I/O Port space ranges */
1411 lba_num = HBA_PORT_BASE(lba_dev->hba.hba_num);
1412 r->start |= lba_num;
1413 r->end |= lba_num;
1414}
1415
1416
1417/**************************************************************************
1418**
1419** LBA initialization code (HW and SW)
1420**
1421** o identify LBA chip itself
1422** o initialize LBA chip modes (HardFail)
1423** o FIXME: initialize DMA hints for reasonable defaults
1424** o enable configuration functions
1425** o call pci_register_ops() to discover devs (fixup/fixup_bus get invoked)
1426**
1427**************************************************************************/
1428
1429static int __init
1430lba_hw_init(struct lba_device *d)
1431{
1432 u32 stat;
1433 u32 bus_reset; /* PDC_PAT_BUG */
1434
1435#if 0
1436 printk(KERN_DEBUG "LBA %lx STAT_CTL %Lx ERROR_CFG %Lx STATUS %Lx DMA_CTL %Lx\n",
1437 d->hba.base_addr,
1438 READ_REG64(d->hba.base_addr + LBA_STAT_CTL),
1439 READ_REG64(d->hba.base_addr + LBA_ERROR_CONFIG),
1440 READ_REG64(d->hba.base_addr + LBA_ERROR_STATUS),
1441 READ_REG64(d->hba.base_addr + LBA_DMA_CTL) );
1442 printk(KERN_DEBUG " ARB mask %Lx pri %Lx mode %Lx mtlt %Lx\n",
1443 READ_REG64(d->hba.base_addr + LBA_ARB_MASK),
1444 READ_REG64(d->hba.base_addr + LBA_ARB_PRI),
1445 READ_REG64(d->hba.base_addr + LBA_ARB_MODE),
1446 READ_REG64(d->hba.base_addr + LBA_ARB_MTLT) );
1447 printk(KERN_DEBUG " HINT cfg 0x%Lx\n",
1448 READ_REG64(d->hba.base_addr + LBA_HINT_CFG));
1449 printk(KERN_DEBUG " HINT reg ");
1450 { int i;
1451 for (i=LBA_HINT_BASE; i< (14*8 + LBA_HINT_BASE); i+=8)
1452 printk(" %Lx", READ_REG64(d->hba.base_addr + i));
1453 }
1454 printk("\n");
1455#endif /* DEBUG_LBA_PAT */
1456
1457#ifdef CONFIG_64BIT
1458/*
1459 * FIXME add support for PDC_PAT_IO "Get slot status" - OLAR support
1460 * Only N-Class and up can really make use of Get slot status.
1461 * maybe L-class too but I've never played with it there.
1462 */
1463#endif
1464
1465 /* PDC_PAT_BUG: exhibited in rev 40.48 on L2000 */
1466 bus_reset = READ_REG32(d->hba.base_addr + LBA_STAT_CTL + 4) & 1;
1467 if (bus_reset) {
1468 printk(KERN_DEBUG "NOTICE: PCI bus reset still asserted! (clearing)\n");
1469 }
1470
1471 stat = READ_REG32(d->hba.base_addr + LBA_ERROR_CONFIG);
1472 if (stat & LBA_SMART_MODE) {
1473 printk(KERN_DEBUG "NOTICE: LBA in SMART mode! (cleared)\n");
1474 stat &= ~LBA_SMART_MODE;
1475 WRITE_REG32(stat, d->hba.base_addr + LBA_ERROR_CONFIG);
1476 }
1477
1478 /* Set HF mode as the default (vs. -1 mode). */
1479 stat = READ_REG32(d->hba.base_addr + LBA_STAT_CTL);
1480 WRITE_REG32(stat | HF_ENABLE, d->hba.base_addr + LBA_STAT_CTL);
1481
1482 /*
1483 ** Writing a zero to STAT_CTL.rf (bit 0) will clear reset signal
1484 ** if it's not already set. If we just cleared the PCI Bus Reset
1485 ** signal, wait a bit for the PCI devices to recover and setup.
1486 */
1487 if (bus_reset)
1488 mdelay(pci_post_reset_delay);
1489
1490 if (0 == READ_REG32(d->hba.base_addr + LBA_ARB_MASK)) {
1491 /*
1492 ** PDC_PAT_BUG: PDC rev 40.48 on L2000.
1493 ** B2000/C3600/J6000 also have this problem?
1494 **
1495 ** Elroys with hot pluggable slots don't get configured
1496 ** correctly if the slot is empty. ARB_MASK is set to 0
1497 ** and we can't master transactions on the bus if it's
1498 ** not at least one. 0x3 enables elroy and first slot.
1499 */
1500 printk(KERN_DEBUG "NOTICE: Enabling PCI Arbitration\n");
1501 WRITE_REG32(0x3, d->hba.base_addr + LBA_ARB_MASK);
1502 }
1503
1504 /*
1505 ** FIXME: Hint registers are programmed with default hint
1506 ** values by firmware. Hints should be sane even if we
1507 ** can't reprogram them the way drivers want.
1508 */
1509 return 0;
1510}
1511
1512
1513
1514/*
1515** Determine if lba should claim this chip (return 0) or not (return 1).
1516** If so, initialize the chip and tell other partners in crime they
1517** have work to do.
1518*/
1519static int __init
1520lba_driver_probe(struct parisc_device *dev)
1521{
1522 struct lba_device *lba_dev;
1523 struct pci_bus *lba_bus;
1524 struct pci_ops *cfg_ops;
1525 u32 func_class;
1526 void *tmp_obj;
1527 char *version;
Matthew Wilcox53f01bb2005-10-21 22:36:40 -04001528 void __iomem *addr = ioremap(dev->hpa.start, 4096);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001529
1530 /* Read HW Rev First */
1531 func_class = READ_REG32(addr + LBA_FCLASS);
1532
1533 if (IS_ELROY(dev)) {
1534 func_class &= 0xf;
1535 switch (func_class) {
1536 case 0: version = "TR1.0"; break;
1537 case 1: version = "TR2.0"; break;
1538 case 2: version = "TR2.1"; break;
1539 case 3: version = "TR2.2"; break;
1540 case 4: version = "TR3.0"; break;
1541 case 5: version = "TR4.0"; break;
1542 default: version = "TR4+";
1543 }
1544
1545 printk(KERN_INFO "%s version %s (0x%x) found at 0x%lx\n",
Matthew Wilcox53f01bb2005-10-21 22:36:40 -04001546 MODULE_NAME, version, func_class & 0xf, dev->hpa.start);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001547
1548 if (func_class < 2) {
1549 printk(KERN_WARNING "Can't support LBA older than "
1550 "TR2.1 - continuing under adversity.\n");
1551 }
1552
1553#if 0
1554/* Elroy TR4.0 should work with simple algorithm.
1555 But it doesn't. Still missing something. *sigh*
1556*/
1557 if (func_class > 4) {
1558 cfg_ops = &mercury_cfg_ops;
1559 } else
1560#endif
1561 {
1562 cfg_ops = &elroy_cfg_ops;
1563 }
1564
1565 } else if (IS_MERCURY(dev) || IS_QUICKSILVER(dev)) {
1566 func_class &= 0xff;
1567 version = kmalloc(6, GFP_KERNEL);
Helge Dellercb6fc182006-01-17 12:40:40 -07001568 snprintf(version, 6, "TR%d.%d",(func_class >> 4),(func_class & 0xf));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001569 /* We could use one printk for both Elroy and Mercury,
1570 * but for the mask for func_class.
1571 */
1572 printk(KERN_INFO "%s version %s (0x%x) found at 0x%lx\n",
Matthew Wilcox53f01bb2005-10-21 22:36:40 -04001573 MODULE_NAME, version, func_class & 0xff, dev->hpa.start);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001574 cfg_ops = &mercury_cfg_ops;
1575 } else {
Matthew Wilcox53f01bb2005-10-21 22:36:40 -04001576 printk(KERN_ERR "Unknown LBA found at 0x%lx\n", dev->hpa.start);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001577 return -ENODEV;
1578 }
1579
1580 /*
1581 ** Tell I/O SAPIC driver we have a IRQ handler/region.
1582 */
Matthew Wilcox53f01bb2005-10-21 22:36:40 -04001583 tmp_obj = iosapic_register(dev->hpa.start + LBA_IOSAPIC_BASE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001584
1585 /* NOTE: PCI devices (e.g. 103c:1005 graphics card) which don't
1586 ** have an IRT entry will get NULL back from iosapic code.
1587 */
1588
Helge Dellercb6fc182006-01-17 12:40:40 -07001589 lba_dev = kzalloc(sizeof(struct lba_device), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001590 if (!lba_dev) {
1591 printk(KERN_ERR "lba_init_chip - couldn't alloc lba_device\n");
1592 return(1);
1593 }
1594
Linus Torvalds1da177e2005-04-16 15:20:36 -07001595
1596 /* ---------- First : initialize data we already have --------- */
1597
1598 lba_dev->hw_rev = func_class;
1599 lba_dev->hba.base_addr = addr;
1600 lba_dev->hba.dev = dev;
1601 lba_dev->iosapic_obj = tmp_obj; /* save interrupt handle */
1602 lba_dev->hba.iommu = sba_get_iommu(dev); /* get iommu data */
1603
1604 /* ------------ Second : initialize common stuff ---------- */
1605 pci_bios = &lba_bios_ops;
1606 pcibios_register_hba(HBA_DATA(lba_dev));
1607 spin_lock_init(&lba_dev->lba_lock);
1608
1609 if (lba_hw_init(lba_dev))
1610 return(1);
1611
1612 /* ---------- Third : setup I/O Port and MMIO resources --------- */
1613
1614 if (is_pdc_pat()) {
1615 /* PDC PAT firmware uses PIOP region of GMMIO space. */
1616 pci_port = &lba_pat_port_ops;
1617 /* Go ask PDC PAT what resources this LBA has */
1618 lba_pat_resources(dev, lba_dev);
1619 } else {
1620 if (!astro_iop_base) {
1621 /* Sprockets PDC uses NPIOP region */
1622 astro_iop_base = ioremap(LBA_PORT_BASE, 64 * 1024);
1623 pci_port = &lba_astro_port_ops;
1624 }
1625
1626 /* Poke the chip a bit for /proc output */
1627 lba_legacy_resources(dev, lba_dev);
1628 }
1629
1630 /*
1631 ** Tell PCI support another PCI bus was found.
1632 ** Walks PCI bus for us too.
1633 */
1634 dev->dev.platform_data = lba_dev;
1635 lba_bus = lba_dev->hba.hba_bus =
1636 pci_scan_bus_parented(&dev->dev, lba_dev->hba.bus_num.start,
1637 cfg_ops, NULL);
Rajesh Shahc431ada2005-04-28 00:25:45 -07001638 if (lba_bus)
1639 pci_bus_add_devices(lba_bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001640
1641 /* This is in lieu of calling pci_assign_unassigned_resources() */
1642 if (is_pdc_pat()) {
1643 /* assign resources to un-initialized devices */
1644
1645 DBG_PAT("LBA pci_bus_size_bridges()\n");
1646 pci_bus_size_bridges(lba_bus);
1647
1648 DBG_PAT("LBA pci_bus_assign_resources()\n");
1649 pci_bus_assign_resources(lba_bus);
1650
1651#ifdef DEBUG_LBA_PAT
1652 DBG_PAT("\nLBA PIOP resource tree\n");
1653 lba_dump_res(&lba_dev->hba.io_space, 2);
1654 DBG_PAT("\nLBA LMMIO resource tree\n");
1655 lba_dump_res(&lba_dev->hba.lmmio_space, 2);
1656#endif
1657 }
1658 pci_enable_bridges(lba_bus);
1659
1660
1661 /*
1662 ** Once PCI register ops has walked the bus, access to config
1663 ** space is restricted. Avoids master aborts on config cycles.
1664 ** Early LBA revs go fatal on *any* master abort.
1665 */
1666 if (cfg_ops == &elroy_cfg_ops) {
1667 lba_dev->flags |= LBA_FLAG_SKIP_PROBE;
1668 }
1669
1670 /* Whew! Finally done! Tell services we got this one covered. */
1671 return 0;
1672}
1673
1674static struct parisc_device_id lba_tbl[] = {
1675 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, ELROY_HVERS, 0xa },
1676 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, MERCURY_HVERS, 0xa },
1677 { HPHW_BRIDGE, HVERSION_REV_ANY_ID, QUICKSILVER_HVERS, 0xa },
1678 { 0, }
1679};
1680
1681static struct parisc_driver lba_driver = {
1682 .name = MODULE_NAME,
1683 .id_table = lba_tbl,
1684 .probe = lba_driver_probe,
1685};
1686
1687/*
1688** One time initialization to let the world know the LBA was found.
1689** Must be called exactly once before pci_init().
1690*/
1691void __init lba_init(void)
1692{
1693 register_parisc_driver(&lba_driver);
1694}
1695
1696/*
1697** Initialize the IBASE/IMASK registers for LBA (Elroy).
1698** Only called from sba_iommu.c in order to route ranges (MMIO vs DMA).
1699** sba_iommu is responsible for locking (none needed at init time).
1700*/
1701void lba_set_iregs(struct parisc_device *lba, u32 ibase, u32 imask)
1702{
Matthew Wilcox53f01bb2005-10-21 22:36:40 -04001703 void __iomem * base_addr = ioremap(lba->hpa.start, 4096);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704
1705 imask <<= 2; /* adjust for hints - 2 more bits */
1706
1707 /* Make sure we aren't trying to set bits that aren't writeable. */
1708 WARN_ON((ibase & 0x001fffff) != 0);
1709 WARN_ON((imask & 0x001fffff) != 0);
1710
1711 DBG("%s() ibase 0x%x imask 0x%x\n", __FUNCTION__, ibase, imask);
1712 WRITE_REG32( imask, base_addr + LBA_IMASK);
1713 WRITE_REG32( ibase, base_addr + LBA_IBASE);
1714 iounmap(base_addr);
1715}
1716