blob: 33385e57443382ba090cd4a1e41b5bdf4af58936 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2** System Bus Adapter (SBA) I/O MMU manager
3**
4** (c) Copyright 2000-2004 Grant Grundler <grundler @ parisc-linux x org>
5** (c) Copyright 2004 Naresh Kumar Inna <knaresh at india x hp x com>
6** (c) Copyright 2000-2004 Hewlett-Packard Company
7**
8** Portions (c) 1999 Dave S. Miller (from sparc64 I/O MMU code)
9**
10** This program is free software; you can redistribute it and/or modify
11** it under the terms of the GNU General Public License as published by
12** the Free Software Foundation; either version 2 of the License, or
13** (at your option) any later version.
14**
15**
16** This module initializes the IOC (I/O Controller) found on B1000/C3000/
17** J5000/J7000/N-class/L-class machines and their successors.
18**
19** FIXME: add DMA hint support programming in both sba and lba modules.
20*/
21
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/types.h>
23#include <linux/kernel.h>
24#include <linux/spinlock.h>
25#include <linux/slab.h>
26#include <linux/init.h>
27
28#include <linux/mm.h>
29#include <linux/string.h>
30#include <linux/pci.h>
FUJITA Tomonorib61e8f42007-10-23 09:30:28 +020031#include <linux/scatterlist.h>
FUJITA Tomonori46663442008-03-04 14:29:28 -080032#include <linux/iommu-helper.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070033
34#include <asm/byteorder.h>
35#include <asm/io.h>
36#include <asm/dma.h> /* for DMA_CHUNK_SIZE */
37
38#include <asm/hardware.h> /* for register_parisc_driver() stuff */
39
40#include <linux/proc_fs.h>
Kyle McMartin7ec14e42006-02-06 10:10:15 -070041#include <linux/seq_file.h>
Paul Gortmaker6caddf02011-08-11 13:24:07 -040042#include <linux/module.h>
Kyle McMartin7ec14e42006-02-06 10:10:15 -070043
Kyle McMartin1790cf92006-08-24 21:32:49 -040044#include <asm/ropes.h>
Kyle McMartin6f034952006-08-13 22:18:57 -040045#include <asm/mckinley.h> /* for proc_mckinley_root */
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <asm/runway.h> /* for proc_runway_root */
Rolf Eike Beer4a8a0782012-05-10 23:08:17 +020047#include <asm/page.h> /* for PAGE0 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070048#include <asm/pdc.h> /* for PDC_MODEL_* */
49#include <asm/pdcpat.h> /* for is_pdc_pat() */
50#include <asm/parisc-device.h>
51
Linus Torvalds1da177e2005-04-16 15:20:36 -070052#define MODULE_NAME "SBA"
53
Linus Torvalds1da177e2005-04-16 15:20:36 -070054/*
55** The number of debug flags is a clue - this code is fragile.
56** Don't even think about messing with it unless you have
57** plenty of 710's to sacrifice to the computer gods. :^)
58*/
59#undef DEBUG_SBA_INIT
60#undef DEBUG_SBA_RUN
61#undef DEBUG_SBA_RUN_SG
62#undef DEBUG_SBA_RESOURCE
63#undef ASSERT_PDIR_SANITY
64#undef DEBUG_LARGE_SG_ENTRIES
65#undef DEBUG_DMB_TRAP
66
67#ifdef DEBUG_SBA_INIT
68#define DBG_INIT(x...) printk(x)
69#else
70#define DBG_INIT(x...)
71#endif
72
73#ifdef DEBUG_SBA_RUN
74#define DBG_RUN(x...) printk(x)
75#else
76#define DBG_RUN(x...)
77#endif
78
79#ifdef DEBUG_SBA_RUN_SG
80#define DBG_RUN_SG(x...) printk(x)
81#else
82#define DBG_RUN_SG(x...)
83#endif
84
85
86#ifdef DEBUG_SBA_RESOURCE
87#define DBG_RES(x...) printk(x)
88#else
89#define DBG_RES(x...)
90#endif
91
Linus Torvalds1da177e2005-04-16 15:20:36 -070092#define SBA_INLINE __inline__
93
Linus Torvalds1da177e2005-04-16 15:20:36 -070094#define DEFAULT_DMA_HINT_REG 0
95
Kyle McMartin08a64362006-08-24 21:33:40 -040096struct sba_device *sba_list;
97EXPORT_SYMBOL_GPL(sba_list);
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
99static unsigned long ioc_needs_fdc = 0;
100
101/* global count of IOMMUs in the system */
102static unsigned int global_ioc_cnt = 0;
103
104/* PA8700 (Piranha 2.2) bug workaround */
105static unsigned long piranha_bad_128k = 0;
106
107/* Looks nice and keeps the compiler happy */
108#define SBA_DEV(d) ((struct sba_device *) (d))
109
Kyle McMartin08a64362006-08-24 21:33:40 -0400110#ifdef CONFIG_AGP_PARISC
111#define SBA_AGP_SUPPORT
112#endif /*CONFIG_AGP_PARISC*/
113
Grant Grundler64908ad2005-10-21 22:37:20 -0400114#ifdef SBA_AGP_SUPPORT
Kyle McMartin08a64362006-08-24 21:33:40 -0400115static int sba_reserve_agpgart = 1;
Randy Dunlap29a1e1d2007-02-05 16:33:59 -0800116module_param(sba_reserve_agpgart, int, 0444);
Kyle McMartin08a64362006-08-24 21:33:40 -0400117MODULE_PARM_DESC(sba_reserve_agpgart, "Reserve half of IO pdir as AGPGART");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700118#endif
119
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120
121/************************************
122** SBA register read and write support
123**
124** BE WARNED: register writes are posted.
125** (ie follow writes which must reach HW with a read)
126**
127** Superdome (in particular, REO) allows only 64-bit CSR accesses.
128*/
Grant Grundler40d78de2006-05-11 00:31:31 -0600129#define READ_REG32(addr) readl(addr)
130#define READ_REG64(addr) readq(addr)
131#define WRITE_REG32(val, addr) writel((val), (addr))
132#define WRITE_REG64(val, addr) writeq((val), (addr))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
Grant Grundler64908ad2005-10-21 22:37:20 -0400134#ifdef CONFIG_64BIT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135#define READ_REG(addr) READ_REG64(addr)
136#define WRITE_REG(value, addr) WRITE_REG64(value, addr)
137#else
138#define READ_REG(addr) READ_REG32(addr)
139#define WRITE_REG(value, addr) WRITE_REG32(value, addr)
140#endif
141
142#ifdef DEBUG_SBA_INIT
143
Grant Grundler64908ad2005-10-21 22:37:20 -0400144/* NOTE: When CONFIG_64BIT isn't defined, READ_REG64() is two 32-bit reads */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
146/**
147 * sba_dump_ranges - debugging only - print ranges assigned to this IOA
148 * @hpa: base address of the sba
149 *
150 * Print the MMIO and IO Port address ranges forwarded by an Astro/Ike/RIO
151 * IO Adapter (aka Bus Converter).
152 */
153static void
154sba_dump_ranges(void __iomem *hpa)
155{
156 DBG_INIT("SBA at 0x%p\n", hpa);
157 DBG_INIT("IOS_DIST_BASE : %Lx\n", READ_REG64(hpa+IOS_DIST_BASE));
158 DBG_INIT("IOS_DIST_MASK : %Lx\n", READ_REG64(hpa+IOS_DIST_MASK));
159 DBG_INIT("IOS_DIST_ROUTE : %Lx\n", READ_REG64(hpa+IOS_DIST_ROUTE));
160 DBG_INIT("\n");
161 DBG_INIT("IOS_DIRECT_BASE : %Lx\n", READ_REG64(hpa+IOS_DIRECT_BASE));
162 DBG_INIT("IOS_DIRECT_MASK : %Lx\n", READ_REG64(hpa+IOS_DIRECT_MASK));
163 DBG_INIT("IOS_DIRECT_ROUTE: %Lx\n", READ_REG64(hpa+IOS_DIRECT_ROUTE));
164}
165
166/**
167 * sba_dump_tlb - debugging only - print IOMMU operating parameters
168 * @hpa: base address of the IOMMU
169 *
170 * Print the size/location of the IO MMU PDIR.
171 */
172static void sba_dump_tlb(void __iomem *hpa)
173{
174 DBG_INIT("IO TLB at 0x%p\n", hpa);
175 DBG_INIT("IOC_IBASE : 0x%Lx\n", READ_REG64(hpa+IOC_IBASE));
176 DBG_INIT("IOC_IMASK : 0x%Lx\n", READ_REG64(hpa+IOC_IMASK));
177 DBG_INIT("IOC_TCNFG : 0x%Lx\n", READ_REG64(hpa+IOC_TCNFG));
178 DBG_INIT("IOC_PDIR_BASE: 0x%Lx\n", READ_REG64(hpa+IOC_PDIR_BASE));
179 DBG_INIT("\n");
180}
181#else
182#define sba_dump_ranges(x)
183#define sba_dump_tlb(x)
Grant Grundler64908ad2005-10-21 22:37:20 -0400184#endif /* DEBUG_SBA_INIT */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
186
187#ifdef ASSERT_PDIR_SANITY
188
189/**
190 * sba_dump_pdir_entry - debugging only - print one IOMMU PDIR entry
191 * @ioc: IO MMU structure which owns the pdir we are interested in.
192 * @msg: text to print ont the output line.
193 * @pide: pdir index.
194 *
195 * Print one entry of the IO MMU PDIR in human readable form.
196 */
197static void
198sba_dump_pdir_entry(struct ioc *ioc, char *msg, uint pide)
199{
200 /* start printing from lowest pde in rval */
201 u64 *ptr = &(ioc->pdir_base[pide & (~0U * BITS_PER_LONG)]);
202 unsigned long *rptr = (unsigned long *) &(ioc->res_map[(pide >>3) & ~(sizeof(unsigned long) - 1)]);
203 uint rcnt;
204
205 printk(KERN_DEBUG "SBA: %s rp %p bit %d rval 0x%lx\n",
206 msg,
207 rptr, pide & (BITS_PER_LONG - 1), *rptr);
208
209 rcnt = 0;
210 while (rcnt < BITS_PER_LONG) {
211 printk(KERN_DEBUG "%s %2d %p %016Lx\n",
212 (rcnt == (pide & (BITS_PER_LONG - 1)))
213 ? " -->" : " ",
214 rcnt, ptr, *ptr );
215 rcnt++;
216 ptr++;
217 }
218 printk(KERN_DEBUG "%s", msg);
219}
220
221
222/**
223 * sba_check_pdir - debugging only - consistency checker
224 * @ioc: IO MMU structure which owns the pdir we are interested in.
225 * @msg: text to print ont the output line.
226 *
227 * Verify the resource map and pdir state is consistent
228 */
229static int
230sba_check_pdir(struct ioc *ioc, char *msg)
231{
232 u32 *rptr_end = (u32 *) &(ioc->res_map[ioc->res_size]);
233 u32 *rptr = (u32 *) ioc->res_map; /* resource map ptr */
234 u64 *pptr = ioc->pdir_base; /* pdir ptr */
235 uint pide = 0;
236
237 while (rptr < rptr_end) {
238 u32 rval = *rptr;
239 int rcnt = 32; /* number of bits we might check */
240
241 while (rcnt) {
242 /* Get last byte and highest bit from that */
243 u32 pde = ((u32) (((char *)pptr)[7])) << 24;
244 if ((rval ^ pde) & 0x80000000)
245 {
246 /*
247 ** BUMMER! -- res_map != pdir --
248 ** Dump rval and matching pdir entries
249 */
250 sba_dump_pdir_entry(ioc, msg, pide);
251 return(1);
252 }
253 rcnt--;
254 rval <<= 1; /* try the next bit */
255 pptr++;
256 pide++;
257 }
258 rptr++; /* look at next word of res_map */
259 }
260 /* It'd be nice if we always got here :^) */
261 return 0;
262}
263
264
265/**
266 * sba_dump_sg - debugging only - print Scatter-Gather list
267 * @ioc: IO MMU structure which owns the pdir we are interested in.
268 * @startsg: head of the SG list
269 * @nents: number of entries in SG list
270 *
271 * print the SG list so we can verify it's correct by hand.
272 */
273static void
274sba_dump_sg( struct ioc *ioc, struct scatterlist *startsg, int nents)
275{
276 while (nents-- > 0) {
277 printk(KERN_DEBUG " %d : %08lx/%05x %p/%05x\n",
278 nents,
279 (unsigned long) sg_dma_address(startsg),
280 sg_dma_len(startsg),
Matthew Wilcox8bf8a1d2015-03-20 13:37:59 -0400281 sg_virt(startsg), startsg->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 startsg++;
283 }
284}
285
286#endif /* ASSERT_PDIR_SANITY */
287
288
289
290
291/**************************************************************
292*
293* I/O Pdir Resource Management
294*
295* Bits set in the resource map are in use.
296* Each bit can represent a number of pages.
297* LSbs represent lower addresses (IOVA's).
298*
299***************************************************************/
300#define PAGES_PER_RANGE 1 /* could increase this to 4 or 8 if needed */
301
302/* Convert from IOVP to IOVA and vice versa. */
303
304#ifdef ZX1_SUPPORT
305/* Pluto (aka ZX1) boxes need to set or clear the ibase bits appropriately */
306#define SBA_IOVA(ioc,iovp,offset,hint_reg) ((ioc->ibase) | (iovp) | (offset))
307#define SBA_IOVP(ioc,iova) ((iova) & (ioc)->iovp_mask)
308#else
309/* only support Astro and ancestors. Saves a few cycles in key places */
310#define SBA_IOVA(ioc,iovp,offset,hint_reg) ((iovp) | (offset))
311#define SBA_IOVP(ioc,iova) (iova)
312#endif
313
314#define PDIR_INDEX(iovp) ((iovp)>>IOVP_SHIFT)
315
316#define RESMAP_MASK(n) (~0UL << (BITS_PER_LONG - (n)))
317#define RESMAP_IDX_MASK (sizeof(unsigned long) - 1)
318
FUJITA Tomonori56ee0cf2008-03-10 20:43:24 +0900319static unsigned long ptr_to_pide(struct ioc *ioc, unsigned long *res_ptr,
320 unsigned int bitshiftcnt)
FUJITA Tomonori46663442008-03-04 14:29:28 -0800321{
322 return (((unsigned long)res_ptr - (unsigned long)ioc->res_map) << 3)
323 + bitshiftcnt;
324}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
326/**
327 * sba_search_bitmap - find free space in IO PDIR resource bitmap
328 * @ioc: IO MMU structure which owns the pdir we are interested in.
329 * @bits_wanted: number of entries we need.
330 *
331 * Find consecutive free bits in resource bitmap.
332 * Each bit represents one entry in the IO Pdir.
333 * Cool perf optimization: search for log2(size) bits at a time.
334 */
335static SBA_INLINE unsigned long
FUJITA Tomonori46663442008-03-04 14:29:28 -0800336sba_search_bitmap(struct ioc *ioc, struct device *dev,
337 unsigned long bits_wanted)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338{
339 unsigned long *res_ptr = ioc->res_hint;
340 unsigned long *res_end = (unsigned long *) &(ioc->res_map[ioc->res_size]);
FUJITA Tomonori46663442008-03-04 14:29:28 -0800341 unsigned long pide = ~0UL, tpide;
342 unsigned long boundary_size;
343 unsigned long shift;
344 int ret;
345
FUJITA Tomonori4a0d3f32008-03-05 17:09:30 +0900346 boundary_size = ALIGN((unsigned long long)dma_get_seg_boundary(dev) + 1,
347 1ULL << IOVP_SHIFT) >> IOVP_SHIFT;
FUJITA Tomonori46663442008-03-04 14:29:28 -0800348
349#if defined(ZX1_SUPPORT)
350 BUG_ON(ioc->ibase & ~IOVP_MASK);
351 shift = ioc->ibase >> IOVP_SHIFT;
352#else
353 shift = 0;
354#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355
356 if (bits_wanted > (BITS_PER_LONG/2)) {
357 /* Search word at a time - no mask needed */
358 for(; res_ptr < res_end; ++res_ptr) {
FUJITA Tomonori46663442008-03-04 14:29:28 -0800359 tpide = ptr_to_pide(ioc, res_ptr, 0);
360 ret = iommu_is_span_boundary(tpide, bits_wanted,
361 shift,
362 boundary_size);
363 if ((*res_ptr == 0) && !ret) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 *res_ptr = RESMAP_MASK(bits_wanted);
FUJITA Tomonori46663442008-03-04 14:29:28 -0800365 pide = tpide;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 break;
367 }
368 }
369 /* point to the next word on next pass */
370 res_ptr++;
371 ioc->res_bitshift = 0;
372 } else {
373 /*
374 ** Search the resource bit map on well-aligned values.
375 ** "o" is the alignment.
376 ** We need the alignment to invalidate I/O TLB using
377 ** SBA HW features in the unmap path.
378 */
379 unsigned long o = 1 << get_order(bits_wanted << PAGE_SHIFT);
Milind Arun Choudhary3cb1d952007-03-06 02:44:13 -0800380 uint bitshiftcnt = ALIGN(ioc->res_bitshift, o);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 unsigned long mask;
382
383 if (bitshiftcnt >= BITS_PER_LONG) {
384 bitshiftcnt = 0;
385 res_ptr++;
386 }
387 mask = RESMAP_MASK(bits_wanted) >> bitshiftcnt;
388
Harvey Harrisona8043ec2008-05-14 16:21:56 -0700389 DBG_RES("%s() o %ld %p", __func__, o, res_ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 while(res_ptr < res_end)
391 {
392 DBG_RES(" %p %lx %lx\n", res_ptr, mask, *res_ptr);
393 WARN_ON(mask == 0);
FUJITA Tomonori46663442008-03-04 14:29:28 -0800394 tpide = ptr_to_pide(ioc, res_ptr, bitshiftcnt);
395 ret = iommu_is_span_boundary(tpide, bits_wanted,
396 shift,
397 boundary_size);
398 if ((((*res_ptr) & mask) == 0) && !ret) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399 *res_ptr |= mask; /* mark resources busy! */
FUJITA Tomonori46663442008-03-04 14:29:28 -0800400 pide = tpide;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 break;
402 }
403 mask >>= o;
404 bitshiftcnt += o;
405 if (mask == 0) {
406 mask = RESMAP_MASK(bits_wanted);
407 bitshiftcnt=0;
408 res_ptr++;
409 }
410 }
411 /* look in the same word on the next pass */
412 ioc->res_bitshift = bitshiftcnt + bits_wanted;
413 }
414
415 /* wrapped ? */
416 if (res_end <= res_ptr) {
417 ioc->res_hint = (unsigned long *) ioc->res_map;
418 ioc->res_bitshift = 0;
419 } else {
420 ioc->res_hint = res_ptr;
421 }
422 return (pide);
423}
424
425
426/**
427 * sba_alloc_range - find free bits and mark them in IO PDIR resource bitmap
428 * @ioc: IO MMU structure which owns the pdir we are interested in.
429 * @size: number of bytes to create a mapping for
430 *
431 * Given a size, find consecutive unmarked and then mark those bits in the
432 * resource bit map.
433 */
434static int
FUJITA Tomonori7c8cda62008-03-04 14:29:28 -0800435sba_alloc_range(struct ioc *ioc, struct device *dev, size_t size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436{
437 unsigned int pages_needed = size >> IOVP_SHIFT;
438#ifdef SBA_COLLECT_STATS
439 unsigned long cr_start = mfctl(16);
440#endif
441 unsigned long pide;
442
FUJITA Tomonori46663442008-03-04 14:29:28 -0800443 pide = sba_search_bitmap(ioc, dev, pages_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 if (pide >= (ioc->res_size << 3)) {
FUJITA Tomonori46663442008-03-04 14:29:28 -0800445 pide = sba_search_bitmap(ioc, dev, pages_needed);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 if (pide >= (ioc->res_size << 3))
447 panic("%s: I/O MMU @ %p is out of mapping resources\n",
448 __FILE__, ioc->ioc_hpa);
449 }
450
451#ifdef ASSERT_PDIR_SANITY
452 /* verify the first enable bit is clear */
453 if(0x00 != ((u8 *) ioc->pdir_base)[pide*sizeof(u64) + 7]) {
454 sba_dump_pdir_entry(ioc, "sba_search_bitmap() botched it?", pide);
455 }
456#endif
457
458 DBG_RES("%s(%x) %d -> %lx hint %x/%x\n",
Harvey Harrisona8043ec2008-05-14 16:21:56 -0700459 __func__, size, pages_needed, pide,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 (uint) ((unsigned long) ioc->res_hint - (unsigned long) ioc->res_map),
461 ioc->res_bitshift );
462
463#ifdef SBA_COLLECT_STATS
464 {
465 unsigned long cr_end = mfctl(16);
466 unsigned long tmp = cr_end - cr_start;
467 /* check for roll over */
468 cr_start = (cr_end < cr_start) ? -(tmp) : (tmp);
469 }
470 ioc->avg_search[ioc->avg_idx++] = cr_start;
471 ioc->avg_idx &= SBA_SEARCH_SAMPLE - 1;
472
473 ioc->used_pages += pages_needed;
474#endif
475
476 return (pide);
477}
478
479
480/**
481 * sba_free_range - unmark bits in IO PDIR resource bitmap
482 * @ioc: IO MMU structure which owns the pdir we are interested in.
483 * @iova: IO virtual address which was previously allocated.
484 * @size: number of bytes to create a mapping for
485 *
486 * clear bits in the ioc's resource map
487 */
488static SBA_INLINE void
489sba_free_range(struct ioc *ioc, dma_addr_t iova, size_t size)
490{
491 unsigned long iovp = SBA_IOVP(ioc, iova);
492 unsigned int pide = PDIR_INDEX(iovp);
493 unsigned int ridx = pide >> 3; /* convert bit to byte address */
494 unsigned long *res_ptr = (unsigned long *) &((ioc)->res_map[ridx & ~RESMAP_IDX_MASK]);
495
496 int bits_not_wanted = size >> IOVP_SHIFT;
497
498 /* 3-bits "bit" address plus 2 (or 3) bits for "byte" == bit in word */
499 unsigned long m = RESMAP_MASK(bits_not_wanted) >> (pide & (BITS_PER_LONG - 1));
500
501 DBG_RES("%s( ,%x,%x) %x/%lx %x %p %lx\n",
Harvey Harrisona8043ec2008-05-14 16:21:56 -0700502 __func__, (uint) iova, size,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 bits_not_wanted, m, pide, res_ptr, *res_ptr);
504
505#ifdef SBA_COLLECT_STATS
506 ioc->used_pages -= bits_not_wanted;
507#endif
508
509 *res_ptr &= ~m;
510}
511
512
513/**************************************************************
514*
515* "Dynamic DMA Mapping" support (aka "Coherent I/O")
516*
517***************************************************************/
518
Grant Grundler64908ad2005-10-21 22:37:20 -0400519#ifdef SBA_HINT_SUPPORT
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520#define SBA_DMA_HINT(ioc, val) ((val) << (ioc)->hint_shift_pdir)
521#endif
522
523typedef unsigned long space_t;
524#define KERNEL_SPACE 0
525
526/**
527 * sba_io_pdir_entry - fill in one IO PDIR entry
528 * @pdir_ptr: pointer to IO PDIR entry
529 * @sid: process Space ID - currently only support KERNEL_SPACE
530 * @vba: Virtual CPU address of buffer to map
531 * @hint: DMA hint set to use for this mapping
532 *
533 * SBA Mapping Routine
534 *
535 * Given a virtual address (vba, arg2) and space id, (sid, arg1)
536 * sba_io_pdir_entry() loads the I/O PDIR entry pointed to by
537 * pdir_ptr (arg0).
538 * Using the bass-ackwards HP bit numbering, Each IO Pdir entry
539 * for Astro/Ike looks like:
540 *
541 *
542 * 0 19 51 55 63
543 * +-+---------------------+----------------------------------+----+--------+
544 * |V| U | PPN[43:12] | U | VI |
545 * +-+---------------------+----------------------------------+----+--------+
546 *
547 * Pluto is basically identical, supports fewer physical address bits:
548 *
549 * 0 23 51 55 63
550 * +-+------------------------+-------------------------------+----+--------+
551 * |V| U | PPN[39:12] | U | VI |
552 * +-+------------------------+-------------------------------+----+--------+
553 *
554 * V == Valid Bit (Most Significant Bit is bit 0)
555 * U == Unused
556 * PPN == Physical Page Number
557 * VI == Virtual Index (aka Coherent Index)
558 *
559 * LPA instruction output is put into PPN field.
560 * LCI (Load Coherence Index) instruction provides the "VI" bits.
561 *
562 * We pre-swap the bytes since PCX-W is Big Endian and the
563 * IOMMU uses little endian for the pdir.
564 */
565
Adrian Bunkdf8e5bc2008-12-02 03:28:16 +0000566static void SBA_INLINE
Linus Torvalds1da177e2005-04-16 15:20:36 -0700567sba_io_pdir_entry(u64 *pdir_ptr, space_t sid, unsigned long vba,
568 unsigned long hint)
569{
570 u64 pa; /* physical address */
571 register unsigned ci; /* coherent index */
572
573 pa = virt_to_phys(vba);
574 pa &= IOVP_MASK;
575
576 mtsp(sid,1);
577 asm("lci 0(%%sr1, %1), %0" : "=r" (ci) : "r" (vba));
Helge Deller6a457162013-05-02 20:41:45 +0000578 pa |= (ci >> PAGE_SHIFT) & 0xff; /* move CI (8 bits) into lowest byte */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700579
Kyle McMartin983daee2006-08-25 12:28:24 -0400580 pa |= SBA_PDIR_VALID_BIT; /* set "valid" bit */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 *pdir_ptr = cpu_to_le64(pa); /* swap and store into I/O Pdir */
582
583 /*
584 * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit set
585 * (bit #61, big endian), we have to flush and sync every time
586 * IO-PDIR is changed in Ike/Astro.
587 */
Grant Grundler64908ad2005-10-21 22:37:20 -0400588 if (ioc_needs_fdc)
589 asm volatile("fdc %%r0(%0)" : : "r" (pdir_ptr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700590}
591
592
593/**
594 * sba_mark_invalid - invalidate one or more IO PDIR entries
595 * @ioc: IO MMU structure which owns the pdir we are interested in.
596 * @iova: IO Virtual Address mapped earlier
597 * @byte_cnt: number of bytes this mapping covers.
598 *
599 * Marking the IO PDIR entry(ies) as Invalid and invalidate
600 * corresponding IO TLB entry. The Ike PCOM (Purge Command Register)
601 * is to purge stale entries in the IO TLB when unmapping entries.
602 *
603 * The PCOM register supports purging of multiple pages, with a minium
604 * of 1 page and a maximum of 2GB. Hardware requires the address be
605 * aligned to the size of the range being purged. The size of the range
606 * must be a power of 2. The "Cool perf optimization" in the
607 * allocation routine helps keep that true.
608 */
609static SBA_INLINE void
610sba_mark_invalid(struct ioc *ioc, dma_addr_t iova, size_t byte_cnt)
611{
612 u32 iovp = (u32) SBA_IOVP(ioc,iova);
Grant Grundler64908ad2005-10-21 22:37:20 -0400613 u64 *pdir_ptr = &ioc->pdir_base[PDIR_INDEX(iovp)];
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614
615#ifdef ASSERT_PDIR_SANITY
Grant Grundler64908ad2005-10-21 22:37:20 -0400616 /* Assert first pdir entry is set.
617 **
618 ** Even though this is a big-endian machine, the entries
619 ** in the iopdir are little endian. That's why we look at
620 ** the byte at +7 instead of at +0.
621 */
622 if (0x80 != (((u8 *) pdir_ptr)[7])) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700623 sba_dump_pdir_entry(ioc,"sba_mark_invalid()", PDIR_INDEX(iovp));
624 }
625#endif
626
Grant Grundler64908ad2005-10-21 22:37:20 -0400627 if (byte_cnt > IOVP_SIZE)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700628 {
Grant Grundler64908ad2005-10-21 22:37:20 -0400629#if 0
630 unsigned long entries_per_cacheline = ioc_needs_fdc ?
631 L1_CACHE_ALIGN(((unsigned long) pdir_ptr))
632 - (unsigned long) pdir_ptr;
633 : 262144;
634#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700635
Grant Grundler64908ad2005-10-21 22:37:20 -0400636 /* set "size" field for PCOM */
637 iovp |= get_order(byte_cnt) + PAGE_SHIFT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700638
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 do {
640 /* clear I/O Pdir entry "valid" bit first */
Grant Grundler64908ad2005-10-21 22:37:20 -0400641 ((u8 *) pdir_ptr)[7] = 0;
642 if (ioc_needs_fdc) {
643 asm volatile("fdc %%r0(%0)" : : "r" (pdir_ptr));
644#if 0
645 entries_per_cacheline = L1_CACHE_SHIFT - 3;
646#endif
647 }
648 pdir_ptr++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700649 byte_cnt -= IOVP_SIZE;
Grant Grundler64908ad2005-10-21 22:37:20 -0400650 } while (byte_cnt > IOVP_SIZE);
651 } else
652 iovp |= IOVP_SHIFT; /* set "size" field for PCOM */
653
654 /*
655 ** clear I/O PDIR entry "valid" bit.
656 ** We have to R/M/W the cacheline regardless how much of the
657 ** pdir entry that we clobber.
658 ** The rest of the entry would be useful for debugging if we
659 ** could dump core on HPMC.
660 */
661 ((u8 *) pdir_ptr)[7] = 0;
662 if (ioc_needs_fdc)
663 asm volatile("fdc %%r0(%0)" : : "r" (pdir_ptr));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664
665 WRITE_REG( SBA_IOVA(ioc, iovp, 0, 0), ioc->ioc_hpa+IOC_PCOM);
666}
667
668/**
669 * sba_dma_supported - PCI driver can query DMA support
670 * @dev: instance of PCI owned by the driver that's asking
671 * @mask: number of address bits this PCI device can handle
672 *
Paul Bolle395cf962011-08-15 02:02:26 +0200673 * See Documentation/DMA-API-HOWTO.txt
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 */
675static int sba_dma_supported( struct device *dev, u64 mask)
676{
677 struct ioc *ioc;
Grant Grundler64908ad2005-10-21 22:37:20 -0400678
Linus Torvalds1da177e2005-04-16 15:20:36 -0700679 if (dev == NULL) {
680 printk(KERN_ERR MODULE_NAME ": EISA/ISA/et al not supported\n");
681 BUG();
682 return(0);
683 }
684
Paul Bolle395cf962011-08-15 02:02:26 +0200685 /* Documentation/DMA-API-HOWTO.txt tells drivers to try 64-bit
Randy Dunlap5872fb92009-01-29 16:28:02 -0800686 * first, then fall back to 32-bit if that fails.
Grant Grundler64908ad2005-10-21 22:37:20 -0400687 * We are just "encouraging" 32-bit DMA masks here since we can
688 * never allow IOMMU bypass unless we add special support for ZX1.
689 */
690 if (mask > ~0U)
691 return 0;
692
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 ioc = GET_IOC(dev);
694
Grant Grundler64908ad2005-10-21 22:37:20 -0400695 /*
696 * check if mask is >= than the current max IO Virt Address
697 * The max IO Virt address will *always* < 30 bits.
698 */
699 return((int)(mask >= (ioc->ibase - 1 +
700 (ioc->pdir_size / sizeof(u64) * IOVP_SIZE) )));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701}
702
703
704/**
705 * sba_map_single - map one buffer and return IOVA for DMA
706 * @dev: instance of PCI owned by the driver that's asking.
707 * @addr: driver buffer to map.
708 * @size: number of bytes to map in driver buffer.
709 * @direction: R/W or both.
710 *
Paul Bolle395cf962011-08-15 02:02:26 +0200711 * See Documentation/DMA-API-HOWTO.txt
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 */
713static dma_addr_t
714sba_map_single(struct device *dev, void *addr, size_t size,
715 enum dma_data_direction direction)
716{
717 struct ioc *ioc;
718 unsigned long flags;
719 dma_addr_t iovp;
720 dma_addr_t offset;
721 u64 *pdir_start;
722 int pide;
723
724 ioc = GET_IOC(dev);
725
726 /* save offset bits */
727 offset = ((dma_addr_t) (long) addr) & ~IOVP_MASK;
728
729 /* round up to nearest IOVP_SIZE */
730 size = (size + offset + ~IOVP_MASK) & IOVP_MASK;
731
732 spin_lock_irqsave(&ioc->res_lock, flags);
733#ifdef ASSERT_PDIR_SANITY
734 sba_check_pdir(ioc,"Check before sba_map_single()");
735#endif
736
737#ifdef SBA_COLLECT_STATS
738 ioc->msingle_calls++;
739 ioc->msingle_pages += size >> IOVP_SHIFT;
740#endif
FUJITA Tomonori7c8cda62008-03-04 14:29:28 -0800741 pide = sba_alloc_range(ioc, dev, size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 iovp = (dma_addr_t) pide << IOVP_SHIFT;
743
744 DBG_RUN("%s() 0x%p -> 0x%lx\n",
Harvey Harrisona8043ec2008-05-14 16:21:56 -0700745 __func__, addr, (long) iovp | offset);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746
747 pdir_start = &(ioc->pdir_base[pide]);
748
749 while (size > 0) {
750 sba_io_pdir_entry(pdir_start, KERNEL_SPACE, (unsigned long) addr, 0);
751
752 DBG_RUN(" pdir 0x%p %02x%02x%02x%02x%02x%02x%02x%02x\n",
753 pdir_start,
754 (u8) (((u8 *) pdir_start)[7]),
755 (u8) (((u8 *) pdir_start)[6]),
756 (u8) (((u8 *) pdir_start)[5]),
757 (u8) (((u8 *) pdir_start)[4]),
758 (u8) (((u8 *) pdir_start)[3]),
759 (u8) (((u8 *) pdir_start)[2]),
760 (u8) (((u8 *) pdir_start)[1]),
761 (u8) (((u8 *) pdir_start)[0])
762 );
763
764 addr += IOVP_SIZE;
765 size -= IOVP_SIZE;
766 pdir_start++;
767 }
Grant Grundler64908ad2005-10-21 22:37:20 -0400768
769 /* force FDC ops in io_pdir_entry() to be visible to IOMMU */
770 if (ioc_needs_fdc)
771 asm volatile("sync" : : );
772
Linus Torvalds1da177e2005-04-16 15:20:36 -0700773#ifdef ASSERT_PDIR_SANITY
774 sba_check_pdir(ioc,"Check after sba_map_single()");
775#endif
776 spin_unlock_irqrestore(&ioc->res_lock, flags);
Grant Grundler64908ad2005-10-21 22:37:20 -0400777
778 /* form complete address */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 return SBA_IOVA(ioc, iovp, offset, DEFAULT_DMA_HINT_REG);
780}
781
782
Christoph Hellwig79387172016-01-20 15:01:47 -0800783static dma_addr_t
784sba_map_page(struct device *dev, struct page *page, unsigned long offset,
785 size_t size, enum dma_data_direction direction,
Krzysztof Kozlowski00085f12016-08-03 13:46:00 -0700786 unsigned long attrs)
Christoph Hellwig79387172016-01-20 15:01:47 -0800787{
788 return sba_map_single(dev, page_address(page) + offset, size,
789 direction);
790}
791
792
Linus Torvalds1da177e2005-04-16 15:20:36 -0700793/**
Christoph Hellwig79387172016-01-20 15:01:47 -0800794 * sba_unmap_page - unmap one IOVA and free resources
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 * @dev: instance of PCI owned by the driver that's asking.
796 * @iova: IOVA of driver buffer previously mapped.
797 * @size: number of bytes mapped in driver buffer.
798 * @direction: R/W or both.
799 *
Paul Bolle395cf962011-08-15 02:02:26 +0200800 * See Documentation/DMA-API-HOWTO.txt
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 */
802static void
Christoph Hellwig79387172016-01-20 15:01:47 -0800803sba_unmap_page(struct device *dev, dma_addr_t iova, size_t size,
Krzysztof Kozlowski00085f12016-08-03 13:46:00 -0700804 enum dma_data_direction direction, unsigned long attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700805{
806 struct ioc *ioc;
807#if DELAYED_RESOURCE_CNT > 0
808 struct sba_dma_pair *d;
809#endif
810 unsigned long flags;
811 dma_addr_t offset;
812
Harvey Harrisona8043ec2008-05-14 16:21:56 -0700813 DBG_RUN("%s() iovp 0x%lx/%x\n", __func__, (long) iova, size);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814
815 ioc = GET_IOC(dev);
816 offset = iova & ~IOVP_MASK;
817 iova ^= offset; /* clear offset bits */
818 size += offset;
Milind Arun Choudhary3cb1d952007-03-06 02:44:13 -0800819 size = ALIGN(size, IOVP_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820
821 spin_lock_irqsave(&ioc->res_lock, flags);
822
823#ifdef SBA_COLLECT_STATS
824 ioc->usingle_calls++;
825 ioc->usingle_pages += size >> IOVP_SHIFT;
826#endif
827
828 sba_mark_invalid(ioc, iova, size);
829
830#if DELAYED_RESOURCE_CNT > 0
831 /* Delaying when we re-use a IO Pdir entry reduces the number
832 * of MMIO reads needed to flush writes to the PCOM register.
833 */
834 d = &(ioc->saved[ioc->saved_cnt]);
835 d->iova = iova;
836 d->size = size;
837 if (++(ioc->saved_cnt) >= DELAYED_RESOURCE_CNT) {
838 int cnt = ioc->saved_cnt;
839 while (cnt--) {
840 sba_free_range(ioc, d->iova, d->size);
841 d--;
842 }
843 ioc->saved_cnt = 0;
Grant Grundler64908ad2005-10-21 22:37:20 -0400844
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */
846 }
847#else /* DELAYED_RESOURCE_CNT == 0 */
848 sba_free_range(ioc, iova, size);
Grant Grundler64908ad2005-10-21 22:37:20 -0400849
850 /* If fdc's were issued, force fdc's to be visible now */
851 if (ioc_needs_fdc)
852 asm volatile("sync" : : );
853
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854 READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */
855#endif /* DELAYED_RESOURCE_CNT == 0 */
Grant Grundler64908ad2005-10-21 22:37:20 -0400856
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 spin_unlock_irqrestore(&ioc->res_lock, flags);
858
859 /* XXX REVISIT for 2.5 Linux - need syncdma for zero-copy support.
860 ** For Astro based systems this isn't a big deal WRT performance.
861 ** As long as 2.4 kernels copyin/copyout data from/to userspace,
862 ** we don't need the syncdma. The issue here is I/O MMU cachelines
863 ** are *not* coherent in all cases. May be hwrev dependent.
864 ** Need to investigate more.
865 asm volatile("syncdma");
866 */
867}
868
869
870/**
Christoph Hellwig79387172016-01-20 15:01:47 -0800871 * sba_alloc - allocate/map shared mem for DMA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 * @hwdev: instance of PCI owned by the driver that's asking.
873 * @size: number of bytes mapped in driver buffer.
874 * @dma_handle: IOVA of new buffer.
875 *
Paul Bolle395cf962011-08-15 02:02:26 +0200876 * See Documentation/DMA-API-HOWTO.txt
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 */
Christoph Hellwig79387172016-01-20 15:01:47 -0800878static void *sba_alloc(struct device *hwdev, size_t size, dma_addr_t *dma_handle,
Krzysztof Kozlowski00085f12016-08-03 13:46:00 -0700879 gfp_t gfp, unsigned long attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880{
881 void *ret;
882
883 if (!hwdev) {
884 /* only support PCI */
885 *dma_handle = 0;
Matthew Wilcoxc2c47982006-10-26 10:06:07 -0600886 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700887 }
888
889 ret = (void *) __get_free_pages(gfp, get_order(size));
890
891 if (ret) {
892 memset(ret, 0, size);
893 *dma_handle = sba_map_single(hwdev, ret, size, 0);
894 }
895
896 return ret;
897}
898
899
900/**
Christoph Hellwig79387172016-01-20 15:01:47 -0800901 * sba_free - free/unmap shared mem for DMA
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902 * @hwdev: instance of PCI owned by the driver that's asking.
903 * @size: number of bytes mapped in driver buffer.
904 * @vaddr: virtual address IOVA of "consistent" buffer.
905 * @dma_handler: IO virtual address of "consistent" buffer.
906 *
Paul Bolle395cf962011-08-15 02:02:26 +0200907 * See Documentation/DMA-API-HOWTO.txt
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 */
909static void
Christoph Hellwig79387172016-01-20 15:01:47 -0800910sba_free(struct device *hwdev, size_t size, void *vaddr,
Krzysztof Kozlowski00085f12016-08-03 13:46:00 -0700911 dma_addr_t dma_handle, unsigned long attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700912{
Krzysztof Kozlowski00085f12016-08-03 13:46:00 -0700913 sba_unmap_page(hwdev, dma_handle, size, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700914 free_pages((unsigned long) vaddr, get_order(size));
915}
916
917
918/*
919** Since 0 is a valid pdir_base index value, can't use that
920** to determine if a value is valid or not. Use a flag to indicate
921** the SG list entry contains a valid pdir index.
922*/
923#define PIDE_FLAG 0x80000000UL
924
925#ifdef SBA_COLLECT_STATS
926#define IOMMU_MAP_STATS
927#endif
928#include "iommu-helpers.h"
929
930#ifdef DEBUG_LARGE_SG_ENTRIES
931int dump_run_sg = 0;
932#endif
933
934
935/**
936 * sba_map_sg - map Scatter/Gather list
937 * @dev: instance of PCI owned by the driver that's asking.
938 * @sglist: array of buffer/length pairs
939 * @nents: number of entries in list
940 * @direction: R/W or both.
941 *
Paul Bolle395cf962011-08-15 02:02:26 +0200942 * See Documentation/DMA-API-HOWTO.txt
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943 */
944static int
945sba_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
Krzysztof Kozlowski00085f12016-08-03 13:46:00 -0700946 enum dma_data_direction direction, unsigned long attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700947{
948 struct ioc *ioc;
949 int coalesced, filled = 0;
950 unsigned long flags;
951
Harvey Harrisona8043ec2008-05-14 16:21:56 -0700952 DBG_RUN_SG("%s() START %d entries\n", __func__, nents);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700953
954 ioc = GET_IOC(dev);
955
956 /* Fast path single entry scatterlists. */
957 if (nents == 1) {
Matthew Wilcox8bf8a1d2015-03-20 13:37:59 -0400958 sg_dma_address(sglist) = sba_map_single(dev, sg_virt(sglist),
Linus Torvalds1da177e2005-04-16 15:20:36 -0700959 sglist->length, direction);
960 sg_dma_len(sglist) = sglist->length;
961 return 1;
962 }
963
964 spin_lock_irqsave(&ioc->res_lock, flags);
965
966#ifdef ASSERT_PDIR_SANITY
967 if (sba_check_pdir(ioc,"Check before sba_map_sg()"))
968 {
969 sba_dump_sg(ioc, sglist, nents);
970 panic("Check before sba_map_sg()");
971 }
972#endif
973
974#ifdef SBA_COLLECT_STATS
975 ioc->msg_calls++;
976#endif
977
978 /*
979 ** First coalesce the chunks and allocate I/O pdir space
980 **
981 ** If this is one DMA stream, we can properly map using the
982 ** correct virtual address associated with each DMA page.
983 ** w/o this association, we wouldn't have coherent DMA!
984 ** Access to the virtual address is what forces a two pass algorithm.
985 */
FUJITA Tomonorid1b51632008-02-04 22:28:03 -0800986 coalesced = iommu_coalesce_chunks(ioc, dev, sglist, nents, sba_alloc_range);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987
988 /*
989 ** Program the I/O Pdir
990 **
991 ** map the virtual addresses to the I/O Pdir
992 ** o dma_address will contain the pdir index
993 ** o dma_len will contain the number of bytes to map
994 ** o address contains the virtual address.
995 */
996 filled = iommu_fill_pdir(ioc, sglist, nents, 0, sba_io_pdir_entry);
997
Grant Grundler64908ad2005-10-21 22:37:20 -0400998 /* force FDC ops in io_pdir_entry() to be visible to IOMMU */
999 if (ioc_needs_fdc)
1000 asm volatile("sync" : : );
1001
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002#ifdef ASSERT_PDIR_SANITY
1003 if (sba_check_pdir(ioc,"Check after sba_map_sg()"))
1004 {
1005 sba_dump_sg(ioc, sglist, nents);
1006 panic("Check after sba_map_sg()\n");
1007 }
1008#endif
1009
1010 spin_unlock_irqrestore(&ioc->res_lock, flags);
1011
Harvey Harrisona8043ec2008-05-14 16:21:56 -07001012 DBG_RUN_SG("%s() DONE %d mappings\n", __func__, filled);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013
1014 return filled;
1015}
1016
1017
1018/**
1019 * sba_unmap_sg - unmap Scatter/Gather list
1020 * @dev: instance of PCI owned by the driver that's asking.
1021 * @sglist: array of buffer/length pairs
1022 * @nents: number of entries in list
1023 * @direction: R/W or both.
1024 *
Paul Bolle395cf962011-08-15 02:02:26 +02001025 * See Documentation/DMA-API-HOWTO.txt
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 */
1027static void
1028sba_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents,
Krzysztof Kozlowski00085f12016-08-03 13:46:00 -07001029 enum dma_data_direction direction, unsigned long attrs)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001030{
1031 struct ioc *ioc;
1032#ifdef ASSERT_PDIR_SANITY
1033 unsigned long flags;
1034#endif
1035
1036 DBG_RUN_SG("%s() START %d entries, %p,%x\n",
Matthew Wilcox8bf8a1d2015-03-20 13:37:59 -04001037 __func__, nents, sg_virt(sglist), sglist->length);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038
1039 ioc = GET_IOC(dev);
1040
1041#ifdef SBA_COLLECT_STATS
1042 ioc->usg_calls++;
1043#endif
1044
1045#ifdef ASSERT_PDIR_SANITY
1046 spin_lock_irqsave(&ioc->res_lock, flags);
1047 sba_check_pdir(ioc,"Check before sba_unmap_sg()");
1048 spin_unlock_irqrestore(&ioc->res_lock, flags);
1049#endif
1050
1051 while (sg_dma_len(sglist) && nents--) {
1052
Christoph Hellwig79387172016-01-20 15:01:47 -08001053 sba_unmap_page(dev, sg_dma_address(sglist), sg_dma_len(sglist),
Krzysztof Kozlowski00085f12016-08-03 13:46:00 -07001054 direction, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055#ifdef SBA_COLLECT_STATS
1056 ioc->usg_pages += ((sg_dma_address(sglist) & ~IOVP_MASK) + sg_dma_len(sglist) + IOVP_SIZE - 1) >> PAGE_SHIFT;
1057 ioc->usingle_calls--; /* kluge since call is unmap_sg() */
1058#endif
1059 ++sglist;
1060 }
1061
Harvey Harrisona8043ec2008-05-14 16:21:56 -07001062 DBG_RUN_SG("%s() DONE (nents %d)\n", __func__, nents);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063
1064#ifdef ASSERT_PDIR_SANITY
1065 spin_lock_irqsave(&ioc->res_lock, flags);
1066 sba_check_pdir(ioc,"Check after sba_unmap_sg()");
1067 spin_unlock_irqrestore(&ioc->res_lock, flags);
1068#endif
1069
1070}
1071
Bart Van Assche52997092017-01-20 13:04:01 -08001072static const struct dma_map_ops sba_ops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001073 .dma_supported = sba_dma_supported,
Christoph Hellwig79387172016-01-20 15:01:47 -08001074 .alloc = sba_alloc,
1075 .free = sba_free,
1076 .map_page = sba_map_page,
1077 .unmap_page = sba_unmap_page,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 .map_sg = sba_map_sg,
1079 .unmap_sg = sba_unmap_sg,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080};
1081
1082
1083/**************************************************************************
1084**
1085** SBA PAT PDC support
1086**
1087** o call pdc_pat_cell_module()
1088** o store ranges in PCI "resource" structures
1089**
1090**************************************************************************/
1091
1092static void
1093sba_get_pat_resources(struct sba_device *sba_dev)
1094{
1095#if 0
1096/*
1097** TODO/REVISIT/FIXME: support for directed ranges requires calls to
1098** PAT PDC to program the SBA/LBA directed range registers...this
1099** burden may fall on the LBA code since it directly supports the
1100** PCI subsystem. It's not clear yet. - ggg
1101*/
1102PAT_MOD(mod)->mod_info.mod_pages = PAT_GET_MOD_PAGES(temp);
1103 FIXME : ???
1104PAT_MOD(mod)->mod_info.dvi = PAT_GET_DVI(temp);
1105 Tells where the dvi bits are located in the address.
1106PAT_MOD(mod)->mod_info.ioc = PAT_GET_IOC(temp);
1107 FIXME : ???
1108#endif
1109}
1110
1111
1112/**************************************************************
1113*
1114* Initialization and claim
1115*
1116***************************************************************/
1117#define PIRANHA_ADDR_MASK 0x00160000UL /* bit 17,18,20 */
1118#define PIRANHA_ADDR_VAL 0x00060000UL /* bit 17,18 on */
1119static void *
1120sba_alloc_pdir(unsigned int pdir_size)
1121{
1122 unsigned long pdir_base;
1123 unsigned long pdir_order = get_order(pdir_size);
1124
1125 pdir_base = __get_free_pages(GFP_KERNEL, pdir_order);
Grant Grundler64908ad2005-10-21 22:37:20 -04001126 if (NULL == (void *) pdir_base) {
1127 panic("%s() could not allocate I/O Page Table\n",
Harvey Harrisona8043ec2008-05-14 16:21:56 -07001128 __func__);
Grant Grundler64908ad2005-10-21 22:37:20 -04001129 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130
1131 /* If this is not PA8700 (PCX-W2)
1132 ** OR newer than ver 2.2
1133 ** OR in a system that doesn't need VINDEX bits from SBA,
1134 **
1135 ** then we aren't exposed to the HW bug.
1136 */
1137 if ( ((boot_cpu_data.pdc.cpuid >> 5) & 0x7f) != 0x13
1138 || (boot_cpu_data.pdc.versions > 0x202)
1139 || (boot_cpu_data.pdc.capabilities & 0x08L) )
1140 return (void *) pdir_base;
1141
1142 /*
1143 * PA8700 (PCX-W2, aka piranha) silent data corruption fix
1144 *
1145 * An interaction between PA8700 CPU (Ver 2.2 or older) and
1146 * Ike/Astro can cause silent data corruption. This is only
1147 * a problem if the I/O PDIR is located in memory such that
1148 * (little-endian) bits 17 and 18 are on and bit 20 is off.
1149 *
1150 * Since the max IO Pdir size is 2MB, by cleverly allocating the
1151 * right physical address, we can either avoid (IOPDIR <= 1MB)
1152 * or minimize (2MB IO Pdir) the problem if we restrict the
1153 * IO Pdir to a maximum size of 2MB-128K (1902K).
1154 *
1155 * Because we always allocate 2^N sized IO pdirs, either of the
1156 * "bad" regions will be the last 128K if at all. That's easy
1157 * to test for.
1158 *
1159 */
1160 if (pdir_order <= (19-12)) {
1161 if (((virt_to_phys(pdir_base)+pdir_size-1) & PIRANHA_ADDR_MASK) == PIRANHA_ADDR_VAL) {
1162 /* allocate a new one on 512k alignment */
1163 unsigned long new_pdir = __get_free_pages(GFP_KERNEL, (19-12));
1164 /* release original */
1165 free_pages(pdir_base, pdir_order);
1166
1167 pdir_base = new_pdir;
1168
1169 /* release excess */
1170 while (pdir_order < (19-12)) {
1171 new_pdir += pdir_size;
1172 free_pages(new_pdir, pdir_order);
1173 pdir_order +=1;
1174 pdir_size <<=1;
1175 }
1176 }
1177 } else {
1178 /*
1179 ** 1MB or 2MB Pdir
1180 ** Needs to be aligned on an "odd" 1MB boundary.
1181 */
1182 unsigned long new_pdir = __get_free_pages(GFP_KERNEL, pdir_order+1); /* 2 or 4MB */
1183
1184 /* release original */
1185 free_pages( pdir_base, pdir_order);
1186
1187 /* release first 1MB */
1188 free_pages(new_pdir, 20-12);
1189
1190 pdir_base = new_pdir + 1024*1024;
1191
1192 if (pdir_order > (20-12)) {
1193 /*
1194 ** 2MB Pdir.
1195 **
1196 ** Flag tells init_bitmap() to mark bad 128k as used
1197 ** and to reduce the size by 128k.
1198 */
1199 piranha_bad_128k = 1;
1200
1201 new_pdir += 3*1024*1024;
1202 /* release last 1MB */
1203 free_pages(new_pdir, 20-12);
1204
1205 /* release unusable 128KB */
1206 free_pages(new_pdir - 128*1024 , 17-12);
1207
1208 pdir_size -= 128*1024;
1209 }
1210 }
1211
1212 memset((void *) pdir_base, 0, pdir_size);
1213 return (void *) pdir_base;
1214}
1215
James Bottomleybfe4f4f2009-01-09 18:57:06 -06001216struct ibase_data_struct {
1217 struct ioc *ioc;
1218 int ioc_num;
1219};
1220
1221static int setup_ibase_imask_callback(struct device *dev, void *data)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001222{
James Bottomleybfe4f4f2009-01-09 18:57:06 -06001223 /* lba_set_iregs() is in drivers/parisc/lba_pci.c */
1224 extern void lba_set_iregs(struct parisc_device *, u32, u32);
1225 struct parisc_device *lba = to_parisc_device(dev);
1226 struct ibase_data_struct *ibd = data;
1227 int rope_num = (lba->hpa.start >> 13) & 0xf;
1228 if (rope_num >> 3 == ibd->ioc_num)
1229 lba_set_iregs(lba, ibd->ioc->ibase, ibd->ioc->imask);
1230 return 0;
Matthew Wilcox56583742005-10-21 22:33:38 -04001231}
1232
1233/* setup Mercury or Elroy IBASE/IMASK registers. */
1234static void
1235setup_ibase_imask(struct parisc_device *sba, struct ioc *ioc, int ioc_num)
1236{
James Bottomleybfe4f4f2009-01-09 18:57:06 -06001237 struct ibase_data_struct ibase_data = {
1238 .ioc = ioc,
1239 .ioc_num = ioc_num,
1240 };
Linus Torvalds1da177e2005-04-16 15:20:36 -07001241
James Bottomleybfe4f4f2009-01-09 18:57:06 -06001242 device_for_each_child(&sba->dev, &ibase_data,
1243 setup_ibase_imask_callback);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001244}
1245
James Bottomleybfe4f4f2009-01-09 18:57:06 -06001246#ifdef SBA_AGP_SUPPORT
1247static int
1248sba_ioc_find_quicksilver(struct device *dev, void *data)
1249{
1250 int *agp_found = data;
1251 struct parisc_device *lba = to_parisc_device(dev);
1252
1253 if (IS_QUICKSILVER(lba))
1254 *agp_found = 1;
1255 return 0;
1256}
1257#endif
1258
Linus Torvalds1da177e2005-04-16 15:20:36 -07001259static void
1260sba_ioc_init_pluto(struct parisc_device *sba, struct ioc *ioc, int ioc_num)
1261{
1262 u32 iova_space_mask;
1263 u32 iova_space_size;
1264 int iov_order, tcnfg;
Grant Grundler64908ad2005-10-21 22:37:20 -04001265#ifdef SBA_AGP_SUPPORT
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266 int agp_found = 0;
1267#endif
1268 /*
1269 ** Firmware programs the base and size of a "safe IOVA space"
1270 ** (one that doesn't overlap memory or LMMIO space) in the
1271 ** IBASE and IMASK registers.
1272 */
1273 ioc->ibase = READ_REG(ioc->ioc_hpa + IOC_IBASE);
1274 iova_space_size = ~(READ_REG(ioc->ioc_hpa + IOC_IMASK) & 0xFFFFFFFFUL) + 1;
1275
1276 if ((ioc->ibase < 0xfed00000UL) && ((ioc->ibase + iova_space_size) > 0xfee00000UL)) {
1277 printk("WARNING: IOV space overlaps local config and interrupt message, truncating\n");
1278 iova_space_size /= 2;
1279 }
1280
1281 /*
1282 ** iov_order is always based on a 1GB IOVA space since we want to
1283 ** turn on the other half for AGP GART.
1284 */
1285 iov_order = get_order(iova_space_size >> (IOVP_SHIFT - PAGE_SHIFT));
1286 ioc->pdir_size = (iova_space_size / IOVP_SIZE) * sizeof(u64);
1287
Grant Grundler40d78de2006-05-11 00:31:31 -06001288 DBG_INIT("%s() hpa 0x%p IOV %dMB (%d bits)\n",
Harvey Harrisona8043ec2008-05-14 16:21:56 -07001289 __func__, ioc->ioc_hpa, iova_space_size >> 20,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290 iov_order + PAGE_SHIFT);
1291
1292 ioc->pdir_base = (void *) __get_free_pages(GFP_KERNEL,
1293 get_order(ioc->pdir_size));
1294 if (!ioc->pdir_base)
1295 panic("Couldn't allocate I/O Page Table\n");
1296
1297 memset(ioc->pdir_base, 0, ioc->pdir_size);
1298
1299 DBG_INIT("%s() pdir %p size %x\n",
Harvey Harrisona8043ec2008-05-14 16:21:56 -07001300 __func__, ioc->pdir_base, ioc->pdir_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301
Grant Grundler64908ad2005-10-21 22:37:20 -04001302#ifdef SBA_HINT_SUPPORT
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303 ioc->hint_shift_pdir = iov_order + PAGE_SHIFT;
1304 ioc->hint_mask_pdir = ~(0x3 << (iov_order + PAGE_SHIFT));
1305
1306 DBG_INIT(" hint_shift_pdir %x hint_mask_pdir %lx\n",
1307 ioc->hint_shift_pdir, ioc->hint_mask_pdir);
1308#endif
1309
1310 WARN_ON((((unsigned long) ioc->pdir_base) & PAGE_MASK) != (unsigned long) ioc->pdir_base);
1311 WRITE_REG(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE);
1312
1313 /* build IMASK for IOC and Elroy */
1314 iova_space_mask = 0xffffffff;
1315 iova_space_mask <<= (iov_order + PAGE_SHIFT);
1316 ioc->imask = iova_space_mask;
1317#ifdef ZX1_SUPPORT
1318 ioc->iovp_mask = ~(iova_space_mask + PAGE_SIZE - 1);
1319#endif
1320 sba_dump_tlb(ioc->ioc_hpa);
1321
1322 setup_ibase_imask(sba, ioc, ioc_num);
1323
1324 WRITE_REG(ioc->imask, ioc->ioc_hpa + IOC_IMASK);
1325
Grant Grundler64908ad2005-10-21 22:37:20 -04001326#ifdef CONFIG_64BIT
Linus Torvalds1da177e2005-04-16 15:20:36 -07001327 /*
1328 ** Setting the upper bits makes checking for bypass addresses
1329 ** a little faster later on.
1330 */
1331 ioc->imask |= 0xFFFFFFFF00000000UL;
1332#endif
1333
1334 /* Set I/O PDIR Page size to system page size */
1335 switch (PAGE_SHIFT) {
1336 case 12: tcnfg = 0; break; /* 4K */
1337 case 13: tcnfg = 1; break; /* 8K */
1338 case 14: tcnfg = 2; break; /* 16K */
1339 case 16: tcnfg = 3; break; /* 64K */
1340 default:
1341 panic(__FILE__ "Unsupported system page size %d",
1342 1 << PAGE_SHIFT);
1343 break;
1344 }
1345 WRITE_REG(tcnfg, ioc->ioc_hpa + IOC_TCNFG);
1346
1347 /*
1348 ** Program the IOC's ibase and enable IOVA translation
1349 ** Bit zero == enable bit.
1350 */
1351 WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa + IOC_IBASE);
1352
1353 /*
1354 ** Clear I/O TLB of any possible entries.
1355 ** (Yes. This is a bit paranoid...but so what)
1356 */
1357 WRITE_REG(ioc->ibase | 31, ioc->ioc_hpa + IOC_PCOM);
1358
Grant Grundler64908ad2005-10-21 22:37:20 -04001359#ifdef SBA_AGP_SUPPORT
Kyle McMartin08a64362006-08-24 21:33:40 -04001360
Linus Torvalds1da177e2005-04-16 15:20:36 -07001361 /*
1362 ** If an AGP device is present, only use half of the IOV space
1363 ** for PCI DMA. Unfortunately we can't know ahead of time
1364 ** whether GART support will actually be used, for now we
1365 ** can just key on any AGP device found in the system.
1366 ** We program the next pdir index after we stop w/ a key for
1367 ** the GART code to handshake on.
1368 */
James Bottomleybfe4f4f2009-01-09 18:57:06 -06001369 device_for_each_child(&sba->dev, &agp_found, sba_ioc_find_quicksilver);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001370
Kyle McMartin08a64362006-08-24 21:33:40 -04001371 if (agp_found && sba_reserve_agpgart) {
1372 printk(KERN_INFO "%s: reserving %dMb of IOVA space for agpgart\n",
Harvey Harrisona8043ec2008-05-14 16:21:56 -07001373 __func__, (iova_space_size/2) >> 20);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001374 ioc->pdir_size /= 2;
Kyle McMartin08a64362006-08-24 21:33:40 -04001375 ioc->pdir_base[PDIR_INDEX(iova_space_size/2)] = SBA_AGPGART_COOKIE;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001376 }
Kyle McMartin08a64362006-08-24 21:33:40 -04001377#endif /*SBA_AGP_SUPPORT*/
Linus Torvalds1da177e2005-04-16 15:20:36 -07001378}
1379
1380static void
1381sba_ioc_init(struct parisc_device *sba, struct ioc *ioc, int ioc_num)
1382{
1383 u32 iova_space_size, iova_space_mask;
Helge Deller6a457162013-05-02 20:41:45 +00001384 unsigned int pdir_size, iov_order, tcnfg;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001385
1386 /*
1387 ** Determine IOVA Space size from memory size.
1388 **
1389 ** Ideally, PCI drivers would register the maximum number
1390 ** of DMA they can have outstanding for each device they
1391 ** own. Next best thing would be to guess how much DMA
1392 ** can be outstanding based on PCI Class/sub-class. Both
1393 ** methods still require some "extra" to support PCI
1394 ** Hot-Plug/Removal of PCI cards. (aka PCI OLARD).
1395 **
1396 ** While we have 32-bits "IOVA" space, top two 2 bits are used
1397 ** for DMA hints - ergo only 30 bits max.
1398 */
1399
Jan Beulich44813742009-09-21 17:03:05 -07001400 iova_space_size = (u32) (totalram_pages/global_ioc_cnt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401
1402 /* limit IOVA space size to 1MB-1GB */
1403 if (iova_space_size < (1 << (20 - PAGE_SHIFT))) {
1404 iova_space_size = 1 << (20 - PAGE_SHIFT);
1405 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406 else if (iova_space_size > (1 << (30 - PAGE_SHIFT))) {
1407 iova_space_size = 1 << (30 - PAGE_SHIFT);
1408 }
Linus Torvalds1da177e2005-04-16 15:20:36 -07001409
1410 /*
1411 ** iova space must be log2() in size.
1412 ** thus, pdir/res_map will also be log2().
1413 ** PIRANHA BUG: Exception is when IO Pdir is 2MB (gets reduced)
1414 */
1415 iov_order = get_order(iova_space_size << PAGE_SHIFT);
1416
1417 /* iova_space_size is now bytes, not pages */
1418 iova_space_size = 1 << (iov_order + PAGE_SHIFT);
1419
1420 ioc->pdir_size = pdir_size = (iova_space_size/IOVP_SIZE) * sizeof(u64);
1421
1422 DBG_INIT("%s() hpa 0x%lx mem %ldMB IOV %dMB (%d bits)\n",
Harvey Harrisona8043ec2008-05-14 16:21:56 -07001423 __func__,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001424 ioc->ioc_hpa,
Jan Beulich44813742009-09-21 17:03:05 -07001425 (unsigned long) totalram_pages >> (20 - PAGE_SHIFT),
Linus Torvalds1da177e2005-04-16 15:20:36 -07001426 iova_space_size>>20,
1427 iov_order + PAGE_SHIFT);
1428
1429 ioc->pdir_base = sba_alloc_pdir(pdir_size);
1430
1431 DBG_INIT("%s() pdir %p size %x\n",
Harvey Harrisona8043ec2008-05-14 16:21:56 -07001432 __func__, ioc->pdir_base, pdir_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001433
Grant Grundler64908ad2005-10-21 22:37:20 -04001434#ifdef SBA_HINT_SUPPORT
Linus Torvalds1da177e2005-04-16 15:20:36 -07001435 /* FIXME : DMA HINTs not used */
1436 ioc->hint_shift_pdir = iov_order + PAGE_SHIFT;
1437 ioc->hint_mask_pdir = ~(0x3 << (iov_order + PAGE_SHIFT));
1438
1439 DBG_INIT(" hint_shift_pdir %x hint_mask_pdir %lx\n",
1440 ioc->hint_shift_pdir, ioc->hint_mask_pdir);
1441#endif
1442
1443 WRITE_REG64(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE);
1444
1445 /* build IMASK for IOC and Elroy */
1446 iova_space_mask = 0xffffffff;
1447 iova_space_mask <<= (iov_order + PAGE_SHIFT);
1448
1449 /*
1450 ** On C3000 w/512MB mem, HP-UX 10.20 reports:
1451 ** ibase=0, imask=0xFE000000, size=0x2000000.
1452 */
1453 ioc->ibase = 0;
1454 ioc->imask = iova_space_mask; /* save it */
1455#ifdef ZX1_SUPPORT
1456 ioc->iovp_mask = ~(iova_space_mask + PAGE_SIZE - 1);
1457#endif
1458
1459 DBG_INIT("%s() IOV base 0x%lx mask 0x%0lx\n",
Harvey Harrisona8043ec2008-05-14 16:21:56 -07001460 __func__, ioc->ibase, ioc->imask);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001461
1462 /*
1463 ** FIXME: Hint registers are programmed with default hint
1464 ** values during boot, so hints should be sane even if we
1465 ** can't reprogram them the way drivers want.
1466 */
1467
1468 setup_ibase_imask(sba, ioc, ioc_num);
1469
1470 /*
1471 ** Program the IOC's ibase and enable IOVA translation
1472 */
1473 WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa+IOC_IBASE);
1474 WRITE_REG(ioc->imask, ioc->ioc_hpa+IOC_IMASK);
1475
Helge Deller6a457162013-05-02 20:41:45 +00001476 /* Set I/O PDIR Page size to system page size */
1477 switch (PAGE_SHIFT) {
1478 case 12: tcnfg = 0; break; /* 4K */
1479 case 13: tcnfg = 1; break; /* 8K */
1480 case 14: tcnfg = 2; break; /* 16K */
1481 case 16: tcnfg = 3; break; /* 64K */
1482 default:
1483 panic(__FILE__ "Unsupported system page size %d",
1484 1 << PAGE_SHIFT);
1485 break;
1486 }
1487 /* Set I/O PDIR Page size to PAGE_SIZE (4k/16k/...) */
1488 WRITE_REG(tcnfg, ioc->ioc_hpa+IOC_TCNFG);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001489
1490 /*
1491 ** Clear I/O TLB of any possible entries.
1492 ** (Yes. This is a bit paranoid...but so what)
1493 */
1494 WRITE_REG(0 | 31, ioc->ioc_hpa+IOC_PCOM);
1495
1496 ioc->ibase = 0; /* used by SBA_IOVA and related macros */
1497
Harvey Harrisona8043ec2008-05-14 16:21:56 -07001498 DBG_INIT("%s() DONE\n", __func__);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001499}
1500
1501
1502
1503/**************************************************************************
1504**
1505** SBA initialization code (HW and SW)
1506**
1507** o identify SBA chip itself
1508** o initialize SBA chip modes (HardFail)
1509** o initialize SBA chip modes (HardFail)
1510** o FIXME: initialize DMA hints for reasonable defaults
1511**
1512**************************************************************************/
1513
Helge Deller5076c152006-03-27 12:52:15 -07001514static void __iomem *ioc_remap(struct sba_device *sba_dev, unsigned int offset)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001515{
Helge Deller5076c152006-03-27 12:52:15 -07001516 return ioremap_nocache(sba_dev->dev->hpa.start + offset, SBA_FUNC_SIZE);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001517}
1518
1519static void sba_hw_init(struct sba_device *sba_dev)
1520{
1521 int i;
1522 int num_ioc;
1523 u64 ioc_ctl;
1524
1525 if (!is_pdc_pat()) {
1526 /* Shutdown the USB controller on Astro-based workstations.
1527 ** Once we reprogram the IOMMU, the next DMA performed by
1528 ** USB will HPMC the box. USB is only enabled if a
1529 ** keyboard is present and found.
1530 **
1531 ** With serial console, j6k v5.0 firmware says:
1532 ** mem_kbd hpa 0xfee003f8 sba 0x0 pad 0x0 cl_class 0x7
1533 **
1534 ** FIXME: Using GFX+USB console at power up but direct
1535 ** linux to serial console is still broken.
1536 ** USB could generate DMA so we must reset USB.
1537 ** The proper sequence would be:
1538 ** o block console output
1539 ** o reset USB device
1540 ** o reprogram serial port
1541 ** o unblock console output
1542 */
1543 if (PAGE0->mem_kbd.cl_class == CL_KEYBD) {
1544 pdc_io_reset_devices();
1545 }
1546
1547 }
1548
1549
1550#if 0
1551printk("sba_hw_init(): mem_boot 0x%x 0x%x 0x%x 0x%x\n", PAGE0->mem_boot.hpa,
1552 PAGE0->mem_boot.spa, PAGE0->mem_boot.pad, PAGE0->mem_boot.cl_class);
1553
1554 /*
1555 ** Need to deal with DMA from LAN.
1556 ** Maybe use page zero boot device as a handle to talk
1557 ** to PDC about which device to shutdown.
1558 **
1559 ** Netbooting, j6k v5.0 firmware says:
1560 ** mem_boot hpa 0xf4008000 sba 0x0 pad 0x0 cl_class 0x1002
1561 ** ARGH! invalid class.
1562 */
1563 if ((PAGE0->mem_boot.cl_class != CL_RANDOM)
1564 && (PAGE0->mem_boot.cl_class != CL_SEQU)) {
1565 pdc_io_reset();
1566 }
1567#endif
1568
Kyle McMartin1b240f42006-08-24 21:30:19 -04001569 if (!IS_PLUTO(sba_dev->dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570 ioc_ctl = READ_REG(sba_dev->sba_hpa+IOC_CTRL);
1571 DBG_INIT("%s() hpa 0x%lx ioc_ctl 0x%Lx ->",
Harvey Harrisona8043ec2008-05-14 16:21:56 -07001572 __func__, sba_dev->sba_hpa, ioc_ctl);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001573 ioc_ctl &= ~(IOC_CTRL_RM | IOC_CTRL_NC | IOC_CTRL_CE);
1574 ioc_ctl |= IOC_CTRL_DD | IOC_CTRL_D4 | IOC_CTRL_TC;
1575 /* j6700 v1.6 firmware sets 0x294f */
1576 /* A500 firmware sets 0x4d */
1577
1578 WRITE_REG(ioc_ctl, sba_dev->sba_hpa+IOC_CTRL);
1579
1580#ifdef DEBUG_SBA_INIT
1581 ioc_ctl = READ_REG64(sba_dev->sba_hpa+IOC_CTRL);
1582 DBG_INIT(" 0x%Lx\n", ioc_ctl);
1583#endif
1584 } /* if !PLUTO */
1585
Kyle McMartin1b240f42006-08-24 21:30:19 -04001586 if (IS_ASTRO(sba_dev->dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001587 int err;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001588 sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, ASTRO_IOC_OFFSET);
1589 num_ioc = 1;
1590
1591 sba_dev->chip_resv.name = "Astro Intr Ack";
1592 sba_dev->chip_resv.start = PCI_F_EXTEND | 0xfef00000UL;
1593 sba_dev->chip_resv.end = PCI_F_EXTEND | (0xff000000UL - 1) ;
1594 err = request_resource(&iomem_resource, &(sba_dev->chip_resv));
Eric Sesterhennb7494552006-03-24 18:52:10 +01001595 BUG_ON(err < 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001596
Kyle McMartin1b240f42006-08-24 21:30:19 -04001597 } else if (IS_PLUTO(sba_dev->dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001598 int err;
1599
Linus Torvalds1da177e2005-04-16 15:20:36 -07001600 sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, PLUTO_IOC_OFFSET);
1601 num_ioc = 1;
1602
1603 sba_dev->chip_resv.name = "Pluto Intr/PIOP/VGA";
1604 sba_dev->chip_resv.start = PCI_F_EXTEND | 0xfee00000UL;
1605 sba_dev->chip_resv.end = PCI_F_EXTEND | (0xff200000UL - 1);
1606 err = request_resource(&iomem_resource, &(sba_dev->chip_resv));
1607 WARN_ON(err < 0);
1608
1609 sba_dev->iommu_resv.name = "IOVA Space";
1610 sba_dev->iommu_resv.start = 0x40000000UL;
1611 sba_dev->iommu_resv.end = 0x50000000UL - 1;
1612 err = request_resource(&iomem_resource, &(sba_dev->iommu_resv));
1613 WARN_ON(err < 0);
1614 } else {
Matthew Wilcox78860892006-09-12 05:19:15 -06001615 /* IKE, REO */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001616 sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, IKE_IOC_OFFSET(0));
1617 sba_dev->ioc[1].ioc_hpa = ioc_remap(sba_dev, IKE_IOC_OFFSET(1));
1618 num_ioc = 2;
1619
1620 /* TODO - LOOKUP Ike/Stretch chipset mem map */
1621 }
Matthew Wilcox78860892006-09-12 05:19:15 -06001622 /* XXX: What about Reo Grande? */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001623
1624 sba_dev->num_ioc = num_ioc;
1625 for (i = 0; i < num_ioc; i++) {
Grant Grundler40d78de2006-05-11 00:31:31 -06001626 void __iomem *ioc_hpa = sba_dev->ioc[i].ioc_hpa;
Grant Grundlerb312c332006-03-30 07:13:21 +00001627 unsigned int j;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001628
Grant Grundlerb312c332006-03-30 07:13:21 +00001629 for (j=0; j < sizeof(u64) * ROPES_PER_IOC; j+=sizeof(u64)) {
1630
1631 /*
1632 * Clear ROPE(N)_CONFIG AO bit.
1633 * Disables "NT Ordering" (~= !"Relaxed Ordering")
1634 * Overrides bit 1 in DMA Hint Sets.
1635 * Improves netperf UDP_STREAM by ~10% for bcm5701.
1636 */
Kyle McMartin1b240f42006-08-24 21:30:19 -04001637 if (IS_PLUTO(sba_dev->dev)) {
Grant Grundler40d78de2006-05-11 00:31:31 -06001638 void __iomem *rope_cfg;
1639 unsigned long cfg_val;
Grant Grundlerb312c332006-03-30 07:13:21 +00001640
1641 rope_cfg = ioc_hpa + IOC_ROPE0_CFG + j;
1642 cfg_val = READ_REG(rope_cfg);
1643 cfg_val &= ~IOC_ROPE_AO;
1644 WRITE_REG(cfg_val, rope_cfg);
1645 }
1646
1647 /*
1648 ** Make sure the box crashes on rope errors.
1649 */
1650 WRITE_REG(HF_ENABLE, ioc_hpa + ROPE0_CTL + j);
1651 }
1652
1653 /* flush out the last writes */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001654 READ_REG(sba_dev->ioc[i].ioc_hpa + ROPE7_CTL);
1655
1656 DBG_INIT(" ioc[%d] ROPE_CFG 0x%Lx ROPE_DBG 0x%Lx\n",
1657 i,
1658 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x40),
1659 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x50)
1660 );
1661 DBG_INIT(" STATUS_CONTROL 0x%Lx FLUSH_CTRL 0x%Lx\n",
1662 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x108),
1663 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x400)
1664 );
1665
Kyle McMartin1b240f42006-08-24 21:30:19 -04001666 if (IS_PLUTO(sba_dev->dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001667 sba_ioc_init_pluto(sba_dev->dev, &(sba_dev->ioc[i]), i);
1668 } else {
1669 sba_ioc_init(sba_dev->dev, &(sba_dev->ioc[i]), i);
1670 }
1671 }
1672}
1673
1674static void
1675sba_common_init(struct sba_device *sba_dev)
1676{
1677 int i;
1678
1679 /* add this one to the head of the list (order doesn't matter)
1680 ** This will be useful for debugging - especially if we get coredumps
1681 */
1682 sba_dev->next = sba_list;
1683 sba_list = sba_dev;
1684
1685 for(i=0; i< sba_dev->num_ioc; i++) {
1686 int res_size;
1687#ifdef DEBUG_DMB_TRAP
1688 extern void iterate_pages(unsigned long , unsigned long ,
1689 void (*)(pte_t * , unsigned long),
1690 unsigned long );
1691 void set_data_memory_break(pte_t * , unsigned long);
1692#endif
1693 /* resource map size dictated by pdir_size */
1694 res_size = sba_dev->ioc[i].pdir_size/sizeof(u64); /* entries */
1695
1696 /* Second part of PIRANHA BUG */
1697 if (piranha_bad_128k) {
1698 res_size -= (128*1024)/sizeof(u64);
1699 }
1700
1701 res_size >>= 3; /* convert bit count to byte count */
1702 DBG_INIT("%s() res_size 0x%x\n",
Harvey Harrisona8043ec2008-05-14 16:21:56 -07001703 __func__, res_size);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001704
1705 sba_dev->ioc[i].res_size = res_size;
1706 sba_dev->ioc[i].res_map = (char *) __get_free_pages(GFP_KERNEL, get_order(res_size));
1707
1708#ifdef DEBUG_DMB_TRAP
1709 iterate_pages( sba_dev->ioc[i].res_map, res_size,
1710 set_data_memory_break, 0);
1711#endif
1712
1713 if (NULL == sba_dev->ioc[i].res_map)
1714 {
1715 panic("%s:%s() could not allocate resource map\n",
Harvey Harrisona8043ec2008-05-14 16:21:56 -07001716 __FILE__, __func__ );
Linus Torvalds1da177e2005-04-16 15:20:36 -07001717 }
1718
1719 memset(sba_dev->ioc[i].res_map, 0, res_size);
1720 /* next available IOVP - circular search */
1721 sba_dev->ioc[i].res_hint = (unsigned long *)
1722 &(sba_dev->ioc[i].res_map[L1_CACHE_BYTES]);
1723
1724#ifdef ASSERT_PDIR_SANITY
1725 /* Mark first bit busy - ie no IOVA 0 */
1726 sba_dev->ioc[i].res_map[0] = 0x80;
1727 sba_dev->ioc[i].pdir_base[0] = 0xeeffc0addbba0080ULL;
1728#endif
1729
1730 /* Third (and last) part of PIRANHA BUG */
1731 if (piranha_bad_128k) {
1732 /* region from +1408K to +1536 is un-usable. */
1733
1734 int idx_start = (1408*1024/sizeof(u64)) >> 3;
1735 int idx_end = (1536*1024/sizeof(u64)) >> 3;
1736 long *p_start = (long *) &(sba_dev->ioc[i].res_map[idx_start]);
1737 long *p_end = (long *) &(sba_dev->ioc[i].res_map[idx_end]);
1738
1739 /* mark that part of the io pdir busy */
1740 while (p_start < p_end)
1741 *p_start++ = -1;
1742
1743 }
1744
1745#ifdef DEBUG_DMB_TRAP
1746 iterate_pages( sba_dev->ioc[i].res_map, res_size,
1747 set_data_memory_break, 0);
1748 iterate_pages( sba_dev->ioc[i].pdir_base, sba_dev->ioc[i].pdir_size,
1749 set_data_memory_break, 0);
1750#endif
1751
1752 DBG_INIT("%s() %d res_map %x %p\n",
Harvey Harrisona8043ec2008-05-14 16:21:56 -07001753 __func__, i, res_size, sba_dev->ioc[i].res_map);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001754 }
1755
1756 spin_lock_init(&sba_dev->sba_lock);
1757 ioc_needs_fdc = boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC;
1758
1759#ifdef DEBUG_SBA_INIT
1760 /*
1761 * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit set
1762 * (bit #61, big endian), we have to flush and sync every time
1763 * IO-PDIR is changed in Ike/Astro.
1764 */
Kyle McMartin692086e2006-05-30 17:50:29 +00001765 if (ioc_needs_fdc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001766 printk(KERN_INFO MODULE_NAME " FDC/SYNC required.\n");
1767 } else {
1768 printk(KERN_INFO MODULE_NAME " IOC has cache coherent PDIR.\n");
1769 }
1770#endif
1771}
1772
1773#ifdef CONFIG_PROC_FS
Kyle McMartin7ec14e42006-02-06 10:10:15 -07001774static int sba_proc_info(struct seq_file *m, void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001775{
1776 struct sba_device *sba_dev = sba_list;
1777 struct ioc *ioc = &sba_dev->ioc[0]; /* FIXME: Multi-IOC support! */
1778 int total_pages = (int) (ioc->res_size << 3); /* 8 bits per byte */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001779#ifdef SBA_COLLECT_STATS
1780 unsigned long avg = 0, min, max;
1781#endif
Joe Perchese693d732015-04-15 16:18:28 -07001782 int i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001783
Joe Perchese693d732015-04-15 16:18:28 -07001784 seq_printf(m, "%s rev %d.%d\n",
1785 sba_dev->name,
1786 (sba_dev->hw_rev & 0x7) + 1,
1787 (sba_dev->hw_rev & 0x18) >> 3);
1788 seq_printf(m, "IO PDIR size : %d bytes (%d entries)\n",
1789 (int)((ioc->res_size << 3) * sizeof(u64)), /* 8 bits/byte */
1790 total_pages);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001791
Joe Perchese693d732015-04-15 16:18:28 -07001792 seq_printf(m, "Resource bitmap : %d bytes (%d pages)\n",
1793 ioc->res_size, ioc->res_size << 3); /* 8 bits per byte */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001794
Joe Perchese693d732015-04-15 16:18:28 -07001795 seq_printf(m, "LMMIO_BASE/MASK/ROUTE %08x %08x %08x\n",
1796 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_BASE),
1797 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_MASK),
1798 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_ROUTE));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001799
1800 for (i=0; i<4; i++)
Joe Perchese693d732015-04-15 16:18:28 -07001801 seq_printf(m, "DIR%d_BASE/MASK/ROUTE %08x %08x %08x\n",
1802 i,
1803 READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_BASE + i*0x18),
1804 READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_MASK + i*0x18),
1805 READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_ROUTE + i*0x18));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001806
1807#ifdef SBA_COLLECT_STATS
Joe Perchese693d732015-04-15 16:18:28 -07001808 seq_printf(m, "IO PDIR entries : %ld free %ld used (%d%%)\n",
1809 total_pages - ioc->used_pages, ioc->used_pages,
1810 (int)(ioc->used_pages * 100 / total_pages));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001811
1812 min = max = ioc->avg_search[0];
1813 for (i = 0; i < SBA_SEARCH_SAMPLE; i++) {
1814 avg += ioc->avg_search[i];
1815 if (ioc->avg_search[i] > max) max = ioc->avg_search[i];
1816 if (ioc->avg_search[i] < min) min = ioc->avg_search[i];
1817 }
1818 avg /= SBA_SEARCH_SAMPLE;
Joe Perchese693d732015-04-15 16:18:28 -07001819 seq_printf(m, " Bitmap search : %ld/%ld/%ld (min/avg/max CPU Cycles)\n",
1820 min, avg, max);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001821
Joe Perchese693d732015-04-15 16:18:28 -07001822 seq_printf(m, "pci_map_single(): %12ld calls %12ld pages (avg %d/1000)\n",
1823 ioc->msingle_calls, ioc->msingle_pages,
1824 (int)((ioc->msingle_pages * 1000)/ioc->msingle_calls));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001825
1826 /* KLUGE - unmap_sg calls unmap_single for each mapped page */
1827 min = ioc->usingle_calls;
1828 max = ioc->usingle_pages - ioc->usg_pages;
Joe Perchese693d732015-04-15 16:18:28 -07001829 seq_printf(m, "pci_unmap_single: %12ld calls %12ld pages (avg %d/1000)\n",
1830 min, max, (int)((max * 1000)/min));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001831
Joe Perchese693d732015-04-15 16:18:28 -07001832 seq_printf(m, "pci_map_sg() : %12ld calls %12ld pages (avg %d/1000)\n",
1833 ioc->msg_calls, ioc->msg_pages,
1834 (int)((ioc->msg_pages * 1000)/ioc->msg_calls));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001835
Joe Perchese693d732015-04-15 16:18:28 -07001836 seq_printf(m, "pci_unmap_sg() : %12ld calls %12ld pages (avg %d/1000)\n",
1837 ioc->usg_calls, ioc->usg_pages,
1838 (int)((ioc->usg_pages * 1000)/ioc->usg_calls));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001839#endif
1840
Kyle McMartin7ec14e42006-02-06 10:10:15 -07001841 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001842}
1843
Linus Torvalds1da177e2005-04-16 15:20:36 -07001844static int
Kyle McMartin7ec14e42006-02-06 10:10:15 -07001845sba_proc_open(struct inode *i, struct file *f)
1846{
1847 return single_open(f, &sba_proc_info, NULL);
1848}
1849
Arjan van de Vend54b1fd2007-02-12 00:55:34 -08001850static const struct file_operations sba_proc_fops = {
Kyle McMartin7ec14e42006-02-06 10:10:15 -07001851 .owner = THIS_MODULE,
1852 .open = sba_proc_open,
1853 .read = seq_read,
1854 .llseek = seq_lseek,
1855 .release = single_release,
1856};
1857
1858static int
1859sba_proc_bitmap_info(struct seq_file *m, void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001860{
1861 struct sba_device *sba_dev = sba_list;
Kyle McMartin7ec14e42006-02-06 10:10:15 -07001862 struct ioc *ioc = &sba_dev->ioc[0]; /* FIXME: Multi-IOC support! */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001863
Andy Shevchenkob342a652015-09-09 15:38:39 -07001864 seq_hex_dump(m, " ", DUMP_PREFIX_NONE, 32, 4, ioc->res_map,
1865 ioc->res_size, false);
Joe Perchese693d732015-04-15 16:18:28 -07001866 seq_putc(m, '\n');
Linus Torvalds1da177e2005-04-16 15:20:36 -07001867
Kyle McMartin7ec14e42006-02-06 10:10:15 -07001868 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001869}
Kyle McMartin7ec14e42006-02-06 10:10:15 -07001870
1871static int
1872sba_proc_bitmap_open(struct inode *i, struct file *f)
1873{
1874 return single_open(f, &sba_proc_bitmap_info, NULL);
1875}
1876
Arjan van de Vend54b1fd2007-02-12 00:55:34 -08001877static const struct file_operations sba_proc_bitmap_fops = {
Kyle McMartin7ec14e42006-02-06 10:10:15 -07001878 .owner = THIS_MODULE,
1879 .open = sba_proc_bitmap_open,
1880 .read = seq_read,
1881 .llseek = seq_lseek,
1882 .release = single_release,
1883};
Linus Torvalds1da177e2005-04-16 15:20:36 -07001884#endif /* CONFIG_PROC_FS */
1885
1886static struct parisc_device_id sba_tbl[] = {
1887 { HPHW_IOA, HVERSION_REV_ANY_ID, ASTRO_RUNWAY_PORT, 0xb },
1888 { HPHW_BCPORT, HVERSION_REV_ANY_ID, IKE_MERCED_PORT, 0xc },
1889 { HPHW_BCPORT, HVERSION_REV_ANY_ID, REO_MERCED_PORT, 0xc },
1890 { HPHW_BCPORT, HVERSION_REV_ANY_ID, REOG_MERCED_PORT, 0xc },
1891 { HPHW_IOA, HVERSION_REV_ANY_ID, PLUTO_MCKINLEY_PORT, 0xc },
1892 { 0, }
1893};
1894
Adrian Bunkdf8e5bc2008-12-02 03:28:16 +00001895static int sba_driver_callback(struct parisc_device *);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001896
1897static struct parisc_driver sba_driver = {
1898 .name = MODULE_NAME,
1899 .id_table = sba_tbl,
1900 .probe = sba_driver_callback,
1901};
1902
1903/*
1904** Determine if sba should claim this chip (return 0) or not (return 1).
1905** If so, initialize the chip and tell other partners in crime they
1906** have work to do.
1907*/
Adrian Bunkdf8e5bc2008-12-02 03:28:16 +00001908static int sba_driver_callback(struct parisc_device *dev)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001909{
1910 struct sba_device *sba_dev;
1911 u32 func_class;
1912 int i;
1913 char *version;
Helge Deller5076c152006-03-27 12:52:15 -07001914 void __iomem *sba_addr = ioremap_nocache(dev->hpa.start, SBA_FUNC_SIZE);
Denis V. Lunev0fd68942008-04-29 01:02:32 -07001915#ifdef CONFIG_PROC_FS
1916 struct proc_dir_entry *root;
1917#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -07001918
1919 sba_dump_ranges(sba_addr);
1920
1921 /* Read HW Rev First */
1922 func_class = READ_REG(sba_addr + SBA_FCLASS);
1923
Kyle McMartin1b240f42006-08-24 21:30:19 -04001924 if (IS_ASTRO(dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001925 unsigned long fclass;
1926 static char astro_rev[]="Astro ?.?";
1927
1928 /* Astro is broken...Read HW Rev First */
1929 fclass = READ_REG(sba_addr);
1930
1931 astro_rev[6] = '1' + (char) (fclass & 0x7);
1932 astro_rev[8] = '0' + (char) ((fclass & 0x18) >> 3);
1933 version = astro_rev;
1934
Kyle McMartin1b240f42006-08-24 21:30:19 -04001935 } else if (IS_IKE(dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001936 static char ike_rev[] = "Ike rev ?";
1937 ike_rev[8] = '0' + (char) (func_class & 0xff);
1938 version = ike_rev;
Kyle McMartin1b240f42006-08-24 21:30:19 -04001939 } else if (IS_PLUTO(dev)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001940 static char pluto_rev[]="Pluto ?.?";
1941 pluto_rev[6] = '0' + (char) ((func_class & 0xf0) >> 4);
1942 pluto_rev[8] = '0' + (char) (func_class & 0x0f);
1943 version = pluto_rev;
1944 } else {
1945 static char reo_rev[] = "REO rev ?";
1946 reo_rev[8] = '0' + (char) (func_class & 0xff);
1947 version = reo_rev;
1948 }
1949
1950 if (!global_ioc_cnt) {
1951 global_ioc_cnt = count_parisc_driver(&sba_driver);
1952
1953 /* Astro and Pluto have one IOC per SBA */
Kyle McMartin1b240f42006-08-24 21:30:19 -04001954 if ((!IS_ASTRO(dev)) || (!IS_PLUTO(dev)))
Linus Torvalds1da177e2005-04-16 15:20:36 -07001955 global_ioc_cnt *= 2;
1956 }
1957
Kyle McMartine9a03992007-10-18 00:04:00 -07001958 printk(KERN_INFO "%s found %s at 0x%llx\n",
1959 MODULE_NAME, version, (unsigned long long)dev->hpa.start);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001960
Helge Dellercb6fc182006-01-17 12:40:40 -07001961 sba_dev = kzalloc(sizeof(struct sba_device), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001962 if (!sba_dev) {
1963 printk(KERN_ERR MODULE_NAME " - couldn't alloc sba_device\n");
1964 return -ENOMEM;
1965 }
1966
1967 parisc_set_drvdata(dev, sba_dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001968
1969 for(i=0; i<MAX_IOC; i++)
1970 spin_lock_init(&(sba_dev->ioc[i].res_lock));
1971
1972 sba_dev->dev = dev;
1973 sba_dev->hw_rev = func_class;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001974 sba_dev->name = dev->name;
1975 sba_dev->sba_hpa = sba_addr;
1976
1977 sba_get_pat_resources(sba_dev);
1978 sba_hw_init(sba_dev);
1979 sba_common_init(sba_dev);
1980
1981 hppa_dma_ops = &sba_ops;
1982
1983#ifdef CONFIG_PROC_FS
Kyle McMartin7ec14e42006-02-06 10:10:15 -07001984 switch (dev->id.hversion) {
1985 case PLUTO_MCKINLEY_PORT:
1986 root = proc_mckinley_root;
1987 break;
1988 case ASTRO_RUNWAY_PORT:
1989 case IKE_MERCED_PORT:
1990 default:
1991 root = proc_runway_root;
1992 break;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001993 }
Kyle McMartin7ec14e42006-02-06 10:10:15 -07001994
Denis V. Lunev0fd68942008-04-29 01:02:32 -07001995 proc_create("sba_iommu", 0, root, &sba_proc_fops);
1996 proc_create("sba_iommu-bitmap", 0, root, &sba_proc_bitmap_fops);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001997#endif
Kyle McMartin7ec14e42006-02-06 10:10:15 -07001998
Linus Torvalds1da177e2005-04-16 15:20:36 -07001999 parisc_has_iommu();
2000 return 0;
2001}
2002
2003/*
2004** One time initialization to let the world know the SBA was found.
2005** This is the only routine which is NOT static.
2006** Must be called exactly once before pci_init().
2007*/
2008void __init sba_init(void)
2009{
2010 register_parisc_driver(&sba_driver);
2011}
2012
2013
2014/**
2015 * sba_get_iommu - Assign the iommu pointer for the pci bus controller.
2016 * @dev: The parisc device.
2017 *
2018 * Returns the appropriate IOMMU data for the given parisc PCI controller.
2019 * This is cached and used later for PCI DMA Mapping.
2020 */
2021void * sba_get_iommu(struct parisc_device *pci_hba)
2022{
2023 struct parisc_device *sba_dev = parisc_parent(pci_hba);
Greg Kroah-Hartmand18dbfa2009-05-04 12:40:54 -07002024 struct sba_device *sba = dev_get_drvdata(&sba_dev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002025 char t = sba_dev->id.hw_type;
2026 int iocnum = (pci_hba->hw_path >> 3); /* rope # */
2027
2028 WARN_ON((t != HPHW_IOA) && (t != HPHW_BCPORT));
2029
2030 return &(sba->ioc[iocnum]);
2031}
2032
2033
2034/**
2035 * sba_directed_lmmio - return first directed LMMIO range routed to rope
2036 * @pa_dev: The parisc device.
2037 * @r: resource PCI host controller wants start/end fields assigned.
2038 *
2039 * For the given parisc PCI controller, determine if any direct ranges
2040 * are routed down the corresponding rope.
2041 */
2042void sba_directed_lmmio(struct parisc_device *pci_hba, struct resource *r)
2043{
2044 struct parisc_device *sba_dev = parisc_parent(pci_hba);
Greg Kroah-Hartmand18dbfa2009-05-04 12:40:54 -07002045 struct sba_device *sba = dev_get_drvdata(&sba_dev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002046 char t = sba_dev->id.hw_type;
2047 int i;
2048 int rope = (pci_hba->hw_path & (ROPES_PER_IOC-1)); /* rope # */
2049
Eric Sesterhennb7494552006-03-24 18:52:10 +01002050 BUG_ON((t!=HPHW_IOA) && (t!=HPHW_BCPORT));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002051
2052 r->start = r->end = 0;
2053
2054 /* Astro has 4 directed ranges. Not sure about Ike/Pluto/et al */
2055 for (i=0; i<4; i++) {
2056 int base, size;
2057 void __iomem *reg = sba->sba_hpa + i*0x18;
2058
2059 base = READ_REG32(reg + LMMIO_DIRECT0_BASE);
2060 if ((base & 1) == 0)
2061 continue; /* not enabled */
2062
2063 size = READ_REG32(reg + LMMIO_DIRECT0_ROUTE);
2064
2065 if ((size & (ROPES_PER_IOC-1)) != rope)
2066 continue; /* directed down different rope */
2067
2068 r->start = (base & ~1UL) | PCI_F_EXTEND;
2069 size = ~ READ_REG32(reg + LMMIO_DIRECT0_MASK);
2070 r->end = r->start + size;
Matthew Wilcoxca0844e2009-06-26 17:44:18 +00002071 r->flags = IORESOURCE_MEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002072 }
2073}
2074
2075
2076/**
2077 * sba_distributed_lmmio - return portion of distributed LMMIO range
2078 * @pa_dev: The parisc device.
2079 * @r: resource PCI host controller wants start/end fields assigned.
2080 *
2081 * For the given parisc PCI controller, return portion of distributed LMMIO
2082 * range. The distributed LMMIO is always present and it's just a question
2083 * of the base address and size of the range.
2084 */
2085void sba_distributed_lmmio(struct parisc_device *pci_hba, struct resource *r )
2086{
2087 struct parisc_device *sba_dev = parisc_parent(pci_hba);
Greg Kroah-Hartmand18dbfa2009-05-04 12:40:54 -07002088 struct sba_device *sba = dev_get_drvdata(&sba_dev->dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -07002089 char t = sba_dev->id.hw_type;
2090 int base, size;
2091 int rope = (pci_hba->hw_path & (ROPES_PER_IOC-1)); /* rope # */
2092
Eric Sesterhennb7494552006-03-24 18:52:10 +01002093 BUG_ON((t!=HPHW_IOA) && (t!=HPHW_BCPORT));
Linus Torvalds1da177e2005-04-16 15:20:36 -07002094
2095 r->start = r->end = 0;
2096
2097 base = READ_REG32(sba->sba_hpa + LMMIO_DIST_BASE);
2098 if ((base & 1) == 0) {
2099 BUG(); /* Gah! Distr Range wasn't enabled! */
2100 return;
2101 }
2102
2103 r->start = (base & ~1UL) | PCI_F_EXTEND;
2104
2105 size = (~READ_REG32(sba->sba_hpa + LMMIO_DIST_MASK)) / ROPES_PER_IOC;
2106 r->start += rope * (size + 1); /* adjust base for this rope */
2107 r->end = r->start + size;
Matthew Wilcoxca0844e2009-06-26 17:44:18 +00002108 r->flags = IORESOURCE_MEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -07002109}