2 ** System Bus Adapter (SBA) I/O MMU manager
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
8 ** Portions (c) 1999 Dave S. Miller (from sparc64 I/O MMU code)
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.
16 ** This module initializes the IOC (I/O Controller) found on B1000/C3000/
17 ** J5000/J7000/N-class/L-class machines and their successors.
19 ** FIXME: add DMA hint support programming in both sba and lba modules.
22 #include <linux/types.h>
23 #include <linux/kernel.h>
24 #include <linux/spinlock.h>
25 #include <linux/slab.h>
26 #include <linux/init.h>
29 #include <linux/string.h>
30 #include <linux/pci.h>
32 #include <asm/byteorder.h>
34 #include <asm/dma.h> /* for DMA_CHUNK_SIZE */
36 #include <asm/hardware.h> /* for register_parisc_driver() stuff */
38 #include <linux/proc_fs.h>
39 #include <linux/seq_file.h>
41 #include <asm/mckinley.h> /* for proc_mckinley_root */
42 #include <asm/runway.h> /* for proc_runway_root */
43 #include <asm/pdc.h> /* for PDC_MODEL_* */
44 #include <asm/pdcpat.h> /* for is_pdc_pat() */
45 #include <asm/parisc-device.h>
47 #define MODULE_NAME "SBA"
50 /* depends on proc fs support. But costs CPU performance */
51 #undef SBA_COLLECT_STATS
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. :^)
61 #undef DEBUG_SBA_RUN_SG
62 #undef DEBUG_SBA_RESOURCE
63 #undef ASSERT_PDIR_SANITY
64 #undef DEBUG_LARGE_SG_ENTRIES
68 #define DBG_INIT(x...) printk(x)
70 #define DBG_INIT(x...)
74 #define DBG_RUN(x...) printk(x)
79 #ifdef DEBUG_SBA_RUN_SG
80 #define DBG_RUN_SG(x...) printk(x)
82 #define DBG_RUN_SG(x...)
86 #ifdef DEBUG_SBA_RESOURCE
87 #define DBG_RES(x...) printk(x)
92 #if defined(CONFIG_64BIT)
93 /* "low end" PA8800 machines use ZX1 chipset: PAT PDC and only run 64-bit */
97 #define SBA_INLINE __inline__
101 ** The number of pdir entries to "free" before issueing
102 ** a read to PCOM register to flush out PCOM writes.
103 ** Interacts with allocation granularity (ie 4 or 8 entries
104 ** allocated and free'd/purged at a time might make this
105 ** less interesting).
107 #define DELAYED_RESOURCE_CNT 16
109 #define DEFAULT_DMA_HINT_REG 0
111 #define ASTRO_RUNWAY_PORT 0x582
112 #define IKE_MERCED_PORT 0x803
113 #define REO_MERCED_PORT 0x804
114 #define REOG_MERCED_PORT 0x805
115 #define PLUTO_MCKINLEY_PORT 0x880
117 #define SBA_FUNC_ID 0x0000 /* function id */
118 #define SBA_FCLASS 0x0008 /* function class, bist, header, rev... */
120 #define IS_ASTRO(id) ((id)->hversion == ASTRO_RUNWAY_PORT)
121 #define IS_IKE(id) ((id)->hversion == IKE_MERCED_PORT)
122 #define IS_PLUTO(id) ((id)->hversion == PLUTO_MCKINLEY_PORT)
124 #define SBA_FUNC_SIZE 4096 /* SBA configuration function reg set */
126 #define ASTRO_IOC_OFFSET (32 * SBA_FUNC_SIZE)
127 #define PLUTO_IOC_OFFSET (1 * SBA_FUNC_SIZE)
128 /* Ike's IOC's occupy functions 2 and 3 */
129 #define IKE_IOC_OFFSET(p) ((p+2) * SBA_FUNC_SIZE)
131 #define IOC_CTRL 0x8 /* IOC_CTRL offset */
132 #define IOC_CTRL_TC (1 << 0) /* TOC Enable */
133 #define IOC_CTRL_CE (1 << 1) /* Coalesce Enable */
134 #define IOC_CTRL_DE (1 << 2) /* Dillon Enable */
135 #define IOC_CTRL_RM (1 << 8) /* Real Mode */
136 #define IOC_CTRL_NC (1 << 9) /* Non Coherent Mode */
137 #define IOC_CTRL_D4 (1 << 11) /* Disable 4-byte coalescing */
138 #define IOC_CTRL_DD (1 << 13) /* Disable distr. LMMIO range coalescing */
140 #define MAX_IOC 2 /* per Ike. Pluto/Astro only have 1. */
142 #define ROPES_PER_IOC 8 /* per Ike half or Pluto/Astro */
146 ** Offsets into MBIB (Function 0 on Ike and hopefully Astro)
147 ** Firmware programs this stuff. Don't touch it.
149 #define LMMIO_DIRECT0_BASE 0x300
150 #define LMMIO_DIRECT0_MASK 0x308
151 #define LMMIO_DIRECT0_ROUTE 0x310
153 #define LMMIO_DIST_BASE 0x360
154 #define LMMIO_DIST_MASK 0x368
155 #define LMMIO_DIST_ROUTE 0x370
157 #define IOS_DIST_BASE 0x390
158 #define IOS_DIST_MASK 0x398
159 #define IOS_DIST_ROUTE 0x3A0
161 #define IOS_DIRECT_BASE 0x3C0
162 #define IOS_DIRECT_MASK 0x3C8
163 #define IOS_DIRECT_ROUTE 0x3D0
166 ** Offsets into I/O TLB (Function 2 and 3 on Ike)
168 #define ROPE0_CTL 0x200 /* "regbus pci0" */
169 #define ROPE1_CTL 0x208
170 #define ROPE2_CTL 0x210
171 #define ROPE3_CTL 0x218
172 #define ROPE4_CTL 0x220
173 #define ROPE5_CTL 0x228
174 #define ROPE6_CTL 0x230
175 #define ROPE7_CTL 0x238
177 #define IOC_ROPE0_CFG 0x500 /* pluto only */
178 #define IOC_ROPE_AO 0x10 /* Allow "Relaxed Ordering" */
182 #define HF_ENABLE 0x40
185 #define IOC_IBASE 0x300 /* IO TLB */
186 #define IOC_IMASK 0x308
187 #define IOC_PCOM 0x310
188 #define IOC_TCNFG 0x318
189 #define IOC_PDIR_BASE 0x320
191 /* AGP GART driver looks for this */
192 #define SBA_IOMMU_COOKIE 0x0000badbadc0ffeeUL
196 ** IOC supports 4/8/16/64KB page sizes (see TCNFG register)
197 ** It's safer (avoid memory corruption) to keep DMA page mappings
198 ** equivalently sized to VM PAGE_SIZE.
200 ** We really can't avoid generating a new mapping for each
201 ** page since the Virtual Coherence Index has to be generated
202 ** and updated for each page.
204 ** PAGE_SIZE could be greater than IOVP_SIZE. But not the inverse.
206 #define IOVP_SIZE PAGE_SIZE
207 #define IOVP_SHIFT PAGE_SHIFT
208 #define IOVP_MASK PAGE_MASK
210 #define SBA_PERF_CFG 0x708 /* Performance Counter stuff */
211 #define SBA_PERF_MASK1 0x718
212 #define SBA_PERF_MASK2 0x730
216 ** Offsets into PCI Performance Counters (functions 12 and 13)
217 ** Controlled by PERF registers in function 2 & 3 respectively.
219 #define SBA_PERF_CNT1 0x200
220 #define SBA_PERF_CNT2 0x208
221 #define SBA_PERF_CNT3 0x210
225 void __iomem *ioc_hpa; /* I/O MMU base address */
226 char *res_map; /* resource map, bit == pdir entry */
227 u64 *pdir_base; /* physical base address */
228 unsigned long ibase; /* pdir IOV Space base - shared w/lba_pci */
229 unsigned long imask; /* pdir IOV Space mask - shared w/lba_pci */
231 unsigned long iovp_mask; /* help convert IOVA to IOVP */
233 unsigned long *res_hint; /* next avail IOVP - circular search */
235 unsigned int res_bitshift; /* from the LEFT! */
236 unsigned int res_size; /* size of resource map in bytes */
237 #ifdef SBA_HINT_SUPPORT
238 /* FIXME : DMA HINTs not used */
239 unsigned long hint_mask_pdir; /* bits used for DMA hints */
240 unsigned int hint_shift_pdir;
242 #if DELAYED_RESOURCE_CNT > 0
244 struct sba_dma_pair {
247 } saved[DELAYED_RESOURCE_CNT];
250 #ifdef SBA_COLLECT_STATS
251 #define SBA_SEARCH_SAMPLE 0x100
252 unsigned long avg_search[SBA_SEARCH_SAMPLE];
253 unsigned long avg_idx; /* current index into avg_search */
254 unsigned long used_pages;
255 unsigned long msingle_calls;
256 unsigned long msingle_pages;
257 unsigned long msg_calls;
258 unsigned long msg_pages;
259 unsigned long usingle_calls;
260 unsigned long usingle_pages;
261 unsigned long usg_calls;
262 unsigned long usg_pages;
265 /* STUFF We don't need in performance path */
266 unsigned int pdir_size; /* in bytes, determined by IOV Space size */
270 struct sba_device *next; /* list of SBA's in system */
271 struct parisc_device *dev; /* dev found in bus walk */
272 struct parisc_device_id *iodc; /* data about dev from firmware */
274 void __iomem *sba_hpa; /* base address */
276 unsigned int flags; /* state/functionality enabled */
277 unsigned int hw_rev; /* HW revision of chip */
279 struct resource chip_resv; /* MMIO reserved for chip */
280 struct resource iommu_resv; /* MMIO reserved for iommu */
282 unsigned int num_ioc; /* number of on-board IOC's */
283 struct ioc ioc[MAX_IOC];
287 static struct sba_device *sba_list;
289 static unsigned long ioc_needs_fdc = 0;
291 /* global count of IOMMUs in the system */
292 static unsigned int global_ioc_cnt = 0;
294 /* PA8700 (Piranha 2.2) bug workaround */
295 static unsigned long piranha_bad_128k = 0;
297 /* Looks nice and keeps the compiler happy */
298 #define SBA_DEV(d) ((struct sba_device *) (d))
300 #ifdef SBA_AGP_SUPPORT
301 static int reserve_sba_gart = 1;
304 #define ROUNDUP(x,y) ((x + ((y)-1)) & ~((y)-1))
307 /************************************
308 ** SBA register read and write support
310 ** BE WARNED: register writes are posted.
311 ** (ie follow writes which must reach HW with a read)
313 ** Superdome (in particular, REO) allows only 64-bit CSR accesses.
315 #define READ_REG32(addr) readl(addr)
316 #define READ_REG64(addr) readq(addr)
317 #define WRITE_REG32(val, addr) writel((val), (addr))
318 #define WRITE_REG64(val, addr) writeq((val), (addr))
321 #define READ_REG(addr) READ_REG64(addr)
322 #define WRITE_REG(value, addr) WRITE_REG64(value, addr)
324 #define READ_REG(addr) READ_REG32(addr)
325 #define WRITE_REG(value, addr) WRITE_REG32(value, addr)
328 #ifdef DEBUG_SBA_INIT
330 /* NOTE: When CONFIG_64BIT isn't defined, READ_REG64() is two 32-bit reads */
333 * sba_dump_ranges - debugging only - print ranges assigned to this IOA
334 * @hpa: base address of the sba
336 * Print the MMIO and IO Port address ranges forwarded by an Astro/Ike/RIO
337 * IO Adapter (aka Bus Converter).
340 sba_dump_ranges(void __iomem *hpa)
342 DBG_INIT("SBA at 0x%p\n", hpa);
343 DBG_INIT("IOS_DIST_BASE : %Lx\n", READ_REG64(hpa+IOS_DIST_BASE));
344 DBG_INIT("IOS_DIST_MASK : %Lx\n", READ_REG64(hpa+IOS_DIST_MASK));
345 DBG_INIT("IOS_DIST_ROUTE : %Lx\n", READ_REG64(hpa+IOS_DIST_ROUTE));
347 DBG_INIT("IOS_DIRECT_BASE : %Lx\n", READ_REG64(hpa+IOS_DIRECT_BASE));
348 DBG_INIT("IOS_DIRECT_MASK : %Lx\n", READ_REG64(hpa+IOS_DIRECT_MASK));
349 DBG_INIT("IOS_DIRECT_ROUTE: %Lx\n", READ_REG64(hpa+IOS_DIRECT_ROUTE));
353 * sba_dump_tlb - debugging only - print IOMMU operating parameters
354 * @hpa: base address of the IOMMU
356 * Print the size/location of the IO MMU PDIR.
358 static void sba_dump_tlb(void __iomem *hpa)
360 DBG_INIT("IO TLB at 0x%p\n", hpa);
361 DBG_INIT("IOC_IBASE : 0x%Lx\n", READ_REG64(hpa+IOC_IBASE));
362 DBG_INIT("IOC_IMASK : 0x%Lx\n", READ_REG64(hpa+IOC_IMASK));
363 DBG_INIT("IOC_TCNFG : 0x%Lx\n", READ_REG64(hpa+IOC_TCNFG));
364 DBG_INIT("IOC_PDIR_BASE: 0x%Lx\n", READ_REG64(hpa+IOC_PDIR_BASE));
368 #define sba_dump_ranges(x)
369 #define sba_dump_tlb(x)
370 #endif /* DEBUG_SBA_INIT */
373 #ifdef ASSERT_PDIR_SANITY
376 * sba_dump_pdir_entry - debugging only - print one IOMMU PDIR entry
377 * @ioc: IO MMU structure which owns the pdir we are interested in.
378 * @msg: text to print ont the output line.
381 * Print one entry of the IO MMU PDIR in human readable form.
384 sba_dump_pdir_entry(struct ioc *ioc, char *msg, uint pide)
386 /* start printing from lowest pde in rval */
387 u64 *ptr = &(ioc->pdir_base[pide & (~0U * BITS_PER_LONG)]);
388 unsigned long *rptr = (unsigned long *) &(ioc->res_map[(pide >>3) & ~(sizeof(unsigned long) - 1)]);
391 printk(KERN_DEBUG "SBA: %s rp %p bit %d rval 0x%lx\n",
393 rptr, pide & (BITS_PER_LONG - 1), *rptr);
396 while (rcnt < BITS_PER_LONG) {
397 printk(KERN_DEBUG "%s %2d %p %016Lx\n",
398 (rcnt == (pide & (BITS_PER_LONG - 1)))
404 printk(KERN_DEBUG "%s", msg);
409 * sba_check_pdir - debugging only - consistency checker
410 * @ioc: IO MMU structure which owns the pdir we are interested in.
411 * @msg: text to print ont the output line.
413 * Verify the resource map and pdir state is consistent
416 sba_check_pdir(struct ioc *ioc, char *msg)
418 u32 *rptr_end = (u32 *) &(ioc->res_map[ioc->res_size]);
419 u32 *rptr = (u32 *) ioc->res_map; /* resource map ptr */
420 u64 *pptr = ioc->pdir_base; /* pdir ptr */
423 while (rptr < rptr_end) {
425 int rcnt = 32; /* number of bits we might check */
428 /* Get last byte and highest bit from that */
429 u32 pde = ((u32) (((char *)pptr)[7])) << 24;
430 if ((rval ^ pde) & 0x80000000)
433 ** BUMMER! -- res_map != pdir --
434 ** Dump rval and matching pdir entries
436 sba_dump_pdir_entry(ioc, msg, pide);
440 rval <<= 1; /* try the next bit */
444 rptr++; /* look at next word of res_map */
446 /* It'd be nice if we always got here :^) */
452 * sba_dump_sg - debugging only - print Scatter-Gather list
453 * @ioc: IO MMU structure which owns the pdir we are interested in.
454 * @startsg: head of the SG list
455 * @nents: number of entries in SG list
457 * print the SG list so we can verify it's correct by hand.
460 sba_dump_sg( struct ioc *ioc, struct scatterlist *startsg, int nents)
462 while (nents-- > 0) {
463 printk(KERN_DEBUG " %d : %08lx/%05x %p/%05x\n",
465 (unsigned long) sg_dma_address(startsg),
467 sg_virt_addr(startsg), startsg->length);
472 #endif /* ASSERT_PDIR_SANITY */
477 /**************************************************************
479 * I/O Pdir Resource Management
481 * Bits set in the resource map are in use.
482 * Each bit can represent a number of pages.
483 * LSbs represent lower addresses (IOVA's).
485 ***************************************************************/
486 #define PAGES_PER_RANGE 1 /* could increase this to 4 or 8 if needed */
488 /* Convert from IOVP to IOVA and vice versa. */
491 /* Pluto (aka ZX1) boxes need to set or clear the ibase bits appropriately */
492 #define SBA_IOVA(ioc,iovp,offset,hint_reg) ((ioc->ibase) | (iovp) | (offset))
493 #define SBA_IOVP(ioc,iova) ((iova) & (ioc)->iovp_mask)
495 /* only support Astro and ancestors. Saves a few cycles in key places */
496 #define SBA_IOVA(ioc,iovp,offset,hint_reg) ((iovp) | (offset))
497 #define SBA_IOVP(ioc,iova) (iova)
500 #define PDIR_INDEX(iovp) ((iovp)>>IOVP_SHIFT)
502 #define RESMAP_MASK(n) (~0UL << (BITS_PER_LONG - (n)))
503 #define RESMAP_IDX_MASK (sizeof(unsigned long) - 1)
507 * sba_search_bitmap - find free space in IO PDIR resource bitmap
508 * @ioc: IO MMU structure which owns the pdir we are interested in.
509 * @bits_wanted: number of entries we need.
511 * Find consecutive free bits in resource bitmap.
512 * Each bit represents one entry in the IO Pdir.
513 * Cool perf optimization: search for log2(size) bits at a time.
515 static SBA_INLINE unsigned long
516 sba_search_bitmap(struct ioc *ioc, unsigned long bits_wanted)
518 unsigned long *res_ptr = ioc->res_hint;
519 unsigned long *res_end = (unsigned long *) &(ioc->res_map[ioc->res_size]);
520 unsigned long pide = ~0UL;
522 if (bits_wanted > (BITS_PER_LONG/2)) {
523 /* Search word at a time - no mask needed */
524 for(; res_ptr < res_end; ++res_ptr) {
526 *res_ptr = RESMAP_MASK(bits_wanted);
527 pide = ((unsigned long)res_ptr - (unsigned long)ioc->res_map);
528 pide <<= 3; /* convert to bit address */
532 /* point to the next word on next pass */
534 ioc->res_bitshift = 0;
537 ** Search the resource bit map on well-aligned values.
538 ** "o" is the alignment.
539 ** We need the alignment to invalidate I/O TLB using
540 ** SBA HW features in the unmap path.
542 unsigned long o = 1 << get_order(bits_wanted << PAGE_SHIFT);
543 uint bitshiftcnt = ROUNDUP(ioc->res_bitshift, o);
546 if (bitshiftcnt >= BITS_PER_LONG) {
550 mask = RESMAP_MASK(bits_wanted) >> bitshiftcnt;
552 DBG_RES("%s() o %ld %p", __FUNCTION__, o, res_ptr);
553 while(res_ptr < res_end)
555 DBG_RES(" %p %lx %lx\n", res_ptr, mask, *res_ptr);
557 if(((*res_ptr) & mask) == 0) {
558 *res_ptr |= mask; /* mark resources busy! */
559 pide = ((unsigned long)res_ptr - (unsigned long)ioc->res_map);
560 pide <<= 3; /* convert to bit address */
567 mask = RESMAP_MASK(bits_wanted);
572 /* look in the same word on the next pass */
573 ioc->res_bitshift = bitshiftcnt + bits_wanted;
577 if (res_end <= res_ptr) {
578 ioc->res_hint = (unsigned long *) ioc->res_map;
579 ioc->res_bitshift = 0;
581 ioc->res_hint = res_ptr;
588 * sba_alloc_range - find free bits and mark them in IO PDIR resource bitmap
589 * @ioc: IO MMU structure which owns the pdir we are interested in.
590 * @size: number of bytes to create a mapping for
592 * Given a size, find consecutive unmarked and then mark those bits in the
596 sba_alloc_range(struct ioc *ioc, size_t size)
598 unsigned int pages_needed = size >> IOVP_SHIFT;
599 #ifdef SBA_COLLECT_STATS
600 unsigned long cr_start = mfctl(16);
604 pide = sba_search_bitmap(ioc, pages_needed);
605 if (pide >= (ioc->res_size << 3)) {
606 pide = sba_search_bitmap(ioc, pages_needed);
607 if (pide >= (ioc->res_size << 3))
608 panic("%s: I/O MMU @ %p is out of mapping resources\n",
609 __FILE__, ioc->ioc_hpa);
612 #ifdef ASSERT_PDIR_SANITY
613 /* verify the first enable bit is clear */
614 if(0x00 != ((u8 *) ioc->pdir_base)[pide*sizeof(u64) + 7]) {
615 sba_dump_pdir_entry(ioc, "sba_search_bitmap() botched it?", pide);
619 DBG_RES("%s(%x) %d -> %lx hint %x/%x\n",
620 __FUNCTION__, size, pages_needed, pide,
621 (uint) ((unsigned long) ioc->res_hint - (unsigned long) ioc->res_map),
624 #ifdef SBA_COLLECT_STATS
626 unsigned long cr_end = mfctl(16);
627 unsigned long tmp = cr_end - cr_start;
628 /* check for roll over */
629 cr_start = (cr_end < cr_start) ? -(tmp) : (tmp);
631 ioc->avg_search[ioc->avg_idx++] = cr_start;
632 ioc->avg_idx &= SBA_SEARCH_SAMPLE - 1;
634 ioc->used_pages += pages_needed;
642 * sba_free_range - unmark bits in IO PDIR resource bitmap
643 * @ioc: IO MMU structure which owns the pdir we are interested in.
644 * @iova: IO virtual address which was previously allocated.
645 * @size: number of bytes to create a mapping for
647 * clear bits in the ioc's resource map
649 static SBA_INLINE void
650 sba_free_range(struct ioc *ioc, dma_addr_t iova, size_t size)
652 unsigned long iovp = SBA_IOVP(ioc, iova);
653 unsigned int pide = PDIR_INDEX(iovp);
654 unsigned int ridx = pide >> 3; /* convert bit to byte address */
655 unsigned long *res_ptr = (unsigned long *) &((ioc)->res_map[ridx & ~RESMAP_IDX_MASK]);
657 int bits_not_wanted = size >> IOVP_SHIFT;
659 /* 3-bits "bit" address plus 2 (or 3) bits for "byte" == bit in word */
660 unsigned long m = RESMAP_MASK(bits_not_wanted) >> (pide & (BITS_PER_LONG - 1));
662 DBG_RES("%s( ,%x,%x) %x/%lx %x %p %lx\n",
663 __FUNCTION__, (uint) iova, size,
664 bits_not_wanted, m, pide, res_ptr, *res_ptr);
666 #ifdef SBA_COLLECT_STATS
667 ioc->used_pages -= bits_not_wanted;
674 /**************************************************************
676 * "Dynamic DMA Mapping" support (aka "Coherent I/O")
678 ***************************************************************/
680 #ifdef SBA_HINT_SUPPORT
681 #define SBA_DMA_HINT(ioc, val) ((val) << (ioc)->hint_shift_pdir)
684 typedef unsigned long space_t;
685 #define KERNEL_SPACE 0
688 * sba_io_pdir_entry - fill in one IO PDIR entry
689 * @pdir_ptr: pointer to IO PDIR entry
690 * @sid: process Space ID - currently only support KERNEL_SPACE
691 * @vba: Virtual CPU address of buffer to map
692 * @hint: DMA hint set to use for this mapping
694 * SBA Mapping Routine
696 * Given a virtual address (vba, arg2) and space id, (sid, arg1)
697 * sba_io_pdir_entry() loads the I/O PDIR entry pointed to by
699 * Using the bass-ackwards HP bit numbering, Each IO Pdir entry
700 * for Astro/Ike looks like:
704 * +-+---------------------+----------------------------------+----+--------+
705 * |V| U | PPN[43:12] | U | VI |
706 * +-+---------------------+----------------------------------+----+--------+
708 * Pluto is basically identical, supports fewer physical address bits:
711 * +-+------------------------+-------------------------------+----+--------+
712 * |V| U | PPN[39:12] | U | VI |
713 * +-+------------------------+-------------------------------+----+--------+
715 * V == Valid Bit (Most Significant Bit is bit 0)
717 * PPN == Physical Page Number
718 * VI == Virtual Index (aka Coherent Index)
720 * LPA instruction output is put into PPN field.
721 * LCI (Load Coherence Index) instruction provides the "VI" bits.
723 * We pre-swap the bytes since PCX-W is Big Endian and the
724 * IOMMU uses little endian for the pdir.
728 sba_io_pdir_entry(u64 *pdir_ptr, space_t sid, unsigned long vba,
731 u64 pa; /* physical address */
732 register unsigned ci; /* coherent index */
734 pa = virt_to_phys(vba);
738 asm("lci 0(%%sr1, %1), %0" : "=r" (ci) : "r" (vba));
739 pa |= (ci >> 12) & 0xff; /* move CI (8 bits) into lowest byte */
741 pa |= 0x8000000000000000ULL; /* set "valid" bit */
742 *pdir_ptr = cpu_to_le64(pa); /* swap and store into I/O Pdir */
745 * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit set
746 * (bit #61, big endian), we have to flush and sync every time
747 * IO-PDIR is changed in Ike/Astro.
750 asm volatile("fdc %%r0(%0)" : : "r" (pdir_ptr));
755 * sba_mark_invalid - invalidate one or more IO PDIR entries
756 * @ioc: IO MMU structure which owns the pdir we are interested in.
757 * @iova: IO Virtual Address mapped earlier
758 * @byte_cnt: number of bytes this mapping covers.
760 * Marking the IO PDIR entry(ies) as Invalid and invalidate
761 * corresponding IO TLB entry. The Ike PCOM (Purge Command Register)
762 * is to purge stale entries in the IO TLB when unmapping entries.
764 * The PCOM register supports purging of multiple pages, with a minium
765 * of 1 page and a maximum of 2GB. Hardware requires the address be
766 * aligned to the size of the range being purged. The size of the range
767 * must be a power of 2. The "Cool perf optimization" in the
768 * allocation routine helps keep that true.
770 static SBA_INLINE void
771 sba_mark_invalid(struct ioc *ioc, dma_addr_t iova, size_t byte_cnt)
773 u32 iovp = (u32) SBA_IOVP(ioc,iova);
774 u64 *pdir_ptr = &ioc->pdir_base[PDIR_INDEX(iovp)];
776 #ifdef ASSERT_PDIR_SANITY
777 /* Assert first pdir entry is set.
779 ** Even though this is a big-endian machine, the entries
780 ** in the iopdir are little endian. That's why we look at
781 ** the byte at +7 instead of at +0.
783 if (0x80 != (((u8 *) pdir_ptr)[7])) {
784 sba_dump_pdir_entry(ioc,"sba_mark_invalid()", PDIR_INDEX(iovp));
788 if (byte_cnt > IOVP_SIZE)
791 unsigned long entries_per_cacheline = ioc_needs_fdc ?
792 L1_CACHE_ALIGN(((unsigned long) pdir_ptr))
793 - (unsigned long) pdir_ptr;
797 /* set "size" field for PCOM */
798 iovp |= get_order(byte_cnt) + PAGE_SHIFT;
801 /* clear I/O Pdir entry "valid" bit first */
802 ((u8 *) pdir_ptr)[7] = 0;
804 asm volatile("fdc %%r0(%0)" : : "r" (pdir_ptr));
806 entries_per_cacheline = L1_CACHE_SHIFT - 3;
810 byte_cnt -= IOVP_SIZE;
811 } while (byte_cnt > IOVP_SIZE);
813 iovp |= IOVP_SHIFT; /* set "size" field for PCOM */
816 ** clear I/O PDIR entry "valid" bit.
817 ** We have to R/M/W the cacheline regardless how much of the
818 ** pdir entry that we clobber.
819 ** The rest of the entry would be useful for debugging if we
820 ** could dump core on HPMC.
822 ((u8 *) pdir_ptr)[7] = 0;
824 asm volatile("fdc %%r0(%0)" : : "r" (pdir_ptr));
826 WRITE_REG( SBA_IOVA(ioc, iovp, 0, 0), ioc->ioc_hpa+IOC_PCOM);
830 * sba_dma_supported - PCI driver can query DMA support
831 * @dev: instance of PCI owned by the driver that's asking
832 * @mask: number of address bits this PCI device can handle
834 * See Documentation/DMA-mapping.txt
836 static int sba_dma_supported( struct device *dev, u64 mask)
841 printk(KERN_ERR MODULE_NAME ": EISA/ISA/et al not supported\n");
846 /* Documentation/DMA-mapping.txt tells drivers to try 64-bit first,
847 * then fall back to 32-bit if that fails.
848 * We are just "encouraging" 32-bit DMA masks here since we can
849 * never allow IOMMU bypass unless we add special support for ZX1.
857 * check if mask is >= than the current max IO Virt Address
858 * The max IO Virt address will *always* < 30 bits.
860 return((int)(mask >= (ioc->ibase - 1 +
861 (ioc->pdir_size / sizeof(u64) * IOVP_SIZE) )));
866 * sba_map_single - map one buffer and return IOVA for DMA
867 * @dev: instance of PCI owned by the driver that's asking.
868 * @addr: driver buffer to map.
869 * @size: number of bytes to map in driver buffer.
870 * @direction: R/W or both.
872 * See Documentation/DMA-mapping.txt
875 sba_map_single(struct device *dev, void *addr, size_t size,
876 enum dma_data_direction direction)
887 /* save offset bits */
888 offset = ((dma_addr_t) (long) addr) & ~IOVP_MASK;
890 /* round up to nearest IOVP_SIZE */
891 size = (size + offset + ~IOVP_MASK) & IOVP_MASK;
893 spin_lock_irqsave(&ioc->res_lock, flags);
894 #ifdef ASSERT_PDIR_SANITY
895 sba_check_pdir(ioc,"Check before sba_map_single()");
898 #ifdef SBA_COLLECT_STATS
899 ioc->msingle_calls++;
900 ioc->msingle_pages += size >> IOVP_SHIFT;
902 pide = sba_alloc_range(ioc, size);
903 iovp = (dma_addr_t) pide << IOVP_SHIFT;
905 DBG_RUN("%s() 0x%p -> 0x%lx\n",
906 __FUNCTION__, addr, (long) iovp | offset);
908 pdir_start = &(ioc->pdir_base[pide]);
911 sba_io_pdir_entry(pdir_start, KERNEL_SPACE, (unsigned long) addr, 0);
913 DBG_RUN(" pdir 0x%p %02x%02x%02x%02x%02x%02x%02x%02x\n",
915 (u8) (((u8 *) pdir_start)[7]),
916 (u8) (((u8 *) pdir_start)[6]),
917 (u8) (((u8 *) pdir_start)[5]),
918 (u8) (((u8 *) pdir_start)[4]),
919 (u8) (((u8 *) pdir_start)[3]),
920 (u8) (((u8 *) pdir_start)[2]),
921 (u8) (((u8 *) pdir_start)[1]),
922 (u8) (((u8 *) pdir_start)[0])
930 /* force FDC ops in io_pdir_entry() to be visible to IOMMU */
932 asm volatile("sync" : : );
934 #ifdef ASSERT_PDIR_SANITY
935 sba_check_pdir(ioc,"Check after sba_map_single()");
937 spin_unlock_irqrestore(&ioc->res_lock, flags);
939 /* form complete address */
940 return SBA_IOVA(ioc, iovp, offset, DEFAULT_DMA_HINT_REG);
945 * sba_unmap_single - unmap one IOVA and free resources
946 * @dev: instance of PCI owned by the driver that's asking.
947 * @iova: IOVA of driver buffer previously mapped.
948 * @size: number of bytes mapped in driver buffer.
949 * @direction: R/W or both.
951 * See Documentation/DMA-mapping.txt
954 sba_unmap_single(struct device *dev, dma_addr_t iova, size_t size,
955 enum dma_data_direction direction)
958 #if DELAYED_RESOURCE_CNT > 0
959 struct sba_dma_pair *d;
964 DBG_RUN("%s() iovp 0x%lx/%x\n", __FUNCTION__, (long) iova, size);
967 offset = iova & ~IOVP_MASK;
968 iova ^= offset; /* clear offset bits */
970 size = ROUNDUP(size, IOVP_SIZE);
972 spin_lock_irqsave(&ioc->res_lock, flags);
974 #ifdef SBA_COLLECT_STATS
975 ioc->usingle_calls++;
976 ioc->usingle_pages += size >> IOVP_SHIFT;
979 sba_mark_invalid(ioc, iova, size);
981 #if DELAYED_RESOURCE_CNT > 0
982 /* Delaying when we re-use a IO Pdir entry reduces the number
983 * of MMIO reads needed to flush writes to the PCOM register.
985 d = &(ioc->saved[ioc->saved_cnt]);
988 if (++(ioc->saved_cnt) >= DELAYED_RESOURCE_CNT) {
989 int cnt = ioc->saved_cnt;
991 sba_free_range(ioc, d->iova, d->size);
996 READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */
998 #else /* DELAYED_RESOURCE_CNT == 0 */
999 sba_free_range(ioc, iova, size);
1001 /* If fdc's were issued, force fdc's to be visible now */
1003 asm volatile("sync" : : );
1005 READ_REG(ioc->ioc_hpa+IOC_PCOM); /* flush purges */
1006 #endif /* DELAYED_RESOURCE_CNT == 0 */
1008 spin_unlock_irqrestore(&ioc->res_lock, flags);
1010 /* XXX REVISIT for 2.5 Linux - need syncdma for zero-copy support.
1011 ** For Astro based systems this isn't a big deal WRT performance.
1012 ** As long as 2.4 kernels copyin/copyout data from/to userspace,
1013 ** we don't need the syncdma. The issue here is I/O MMU cachelines
1014 ** are *not* coherent in all cases. May be hwrev dependent.
1015 ** Need to investigate more.
1016 asm volatile("syncdma");
1022 * sba_alloc_consistent - allocate/map shared mem for DMA
1023 * @hwdev: instance of PCI owned by the driver that's asking.
1024 * @size: number of bytes mapped in driver buffer.
1025 * @dma_handle: IOVA of new buffer.
1027 * See Documentation/DMA-mapping.txt
1029 static void *sba_alloc_consistent(struct device *hwdev, size_t size,
1030 dma_addr_t *dma_handle, gfp_t gfp)
1035 /* only support PCI */
1040 ret = (void *) __get_free_pages(gfp, get_order(size));
1043 memset(ret, 0, size);
1044 *dma_handle = sba_map_single(hwdev, ret, size, 0);
1052 * sba_free_consistent - free/unmap shared mem for DMA
1053 * @hwdev: instance of PCI owned by the driver that's asking.
1054 * @size: number of bytes mapped in driver buffer.
1055 * @vaddr: virtual address IOVA of "consistent" buffer.
1056 * @dma_handler: IO virtual address of "consistent" buffer.
1058 * See Documentation/DMA-mapping.txt
1061 sba_free_consistent(struct device *hwdev, size_t size, void *vaddr,
1062 dma_addr_t dma_handle)
1064 sba_unmap_single(hwdev, dma_handle, size, 0);
1065 free_pages((unsigned long) vaddr, get_order(size));
1070 ** Since 0 is a valid pdir_base index value, can't use that
1071 ** to determine if a value is valid or not. Use a flag to indicate
1072 ** the SG list entry contains a valid pdir index.
1074 #define PIDE_FLAG 0x80000000UL
1076 #ifdef SBA_COLLECT_STATS
1077 #define IOMMU_MAP_STATS
1079 #include "iommu-helpers.h"
1081 #ifdef DEBUG_LARGE_SG_ENTRIES
1082 int dump_run_sg = 0;
1087 * sba_map_sg - map Scatter/Gather list
1088 * @dev: instance of PCI owned by the driver that's asking.
1089 * @sglist: array of buffer/length pairs
1090 * @nents: number of entries in list
1091 * @direction: R/W or both.
1093 * See Documentation/DMA-mapping.txt
1096 sba_map_sg(struct device *dev, struct scatterlist *sglist, int nents,
1097 enum dma_data_direction direction)
1100 int coalesced, filled = 0;
1101 unsigned long flags;
1103 DBG_RUN_SG("%s() START %d entries\n", __FUNCTION__, nents);
1107 /* Fast path single entry scatterlists. */
1109 sg_dma_address(sglist) = sba_map_single(dev,
1110 (void *)sg_virt_addr(sglist),
1111 sglist->length, direction);
1112 sg_dma_len(sglist) = sglist->length;
1116 spin_lock_irqsave(&ioc->res_lock, flags);
1118 #ifdef ASSERT_PDIR_SANITY
1119 if (sba_check_pdir(ioc,"Check before sba_map_sg()"))
1121 sba_dump_sg(ioc, sglist, nents);
1122 panic("Check before sba_map_sg()");
1126 #ifdef SBA_COLLECT_STATS
1131 ** First coalesce the chunks and allocate I/O pdir space
1133 ** If this is one DMA stream, we can properly map using the
1134 ** correct virtual address associated with each DMA page.
1135 ** w/o this association, we wouldn't have coherent DMA!
1136 ** Access to the virtual address is what forces a two pass algorithm.
1138 coalesced = iommu_coalesce_chunks(ioc, sglist, nents, sba_alloc_range);
1141 ** Program the I/O Pdir
1143 ** map the virtual addresses to the I/O Pdir
1144 ** o dma_address will contain the pdir index
1145 ** o dma_len will contain the number of bytes to map
1146 ** o address contains the virtual address.
1148 filled = iommu_fill_pdir(ioc, sglist, nents, 0, sba_io_pdir_entry);
1150 /* force FDC ops in io_pdir_entry() to be visible to IOMMU */
1152 asm volatile("sync" : : );
1154 #ifdef ASSERT_PDIR_SANITY
1155 if (sba_check_pdir(ioc,"Check after sba_map_sg()"))
1157 sba_dump_sg(ioc, sglist, nents);
1158 panic("Check after sba_map_sg()\n");
1162 spin_unlock_irqrestore(&ioc->res_lock, flags);
1164 DBG_RUN_SG("%s() DONE %d mappings\n", __FUNCTION__, filled);
1171 * sba_unmap_sg - unmap Scatter/Gather list
1172 * @dev: instance of PCI owned by the driver that's asking.
1173 * @sglist: array of buffer/length pairs
1174 * @nents: number of entries in list
1175 * @direction: R/W or both.
1177 * See Documentation/DMA-mapping.txt
1180 sba_unmap_sg(struct device *dev, struct scatterlist *sglist, int nents,
1181 enum dma_data_direction direction)
1184 #ifdef ASSERT_PDIR_SANITY
1185 unsigned long flags;
1188 DBG_RUN_SG("%s() START %d entries, %p,%x\n",
1189 __FUNCTION__, nents, sg_virt_addr(sglist), sglist->length);
1193 #ifdef SBA_COLLECT_STATS
1197 #ifdef ASSERT_PDIR_SANITY
1198 spin_lock_irqsave(&ioc->res_lock, flags);
1199 sba_check_pdir(ioc,"Check before sba_unmap_sg()");
1200 spin_unlock_irqrestore(&ioc->res_lock, flags);
1203 while (sg_dma_len(sglist) && nents--) {
1205 sba_unmap_single(dev, sg_dma_address(sglist), sg_dma_len(sglist), direction);
1206 #ifdef SBA_COLLECT_STATS
1207 ioc->usg_pages += ((sg_dma_address(sglist) & ~IOVP_MASK) + sg_dma_len(sglist) + IOVP_SIZE - 1) >> PAGE_SHIFT;
1208 ioc->usingle_calls--; /* kluge since call is unmap_sg() */
1213 DBG_RUN_SG("%s() DONE (nents %d)\n", __FUNCTION__, nents);
1215 #ifdef ASSERT_PDIR_SANITY
1216 spin_lock_irqsave(&ioc->res_lock, flags);
1217 sba_check_pdir(ioc,"Check after sba_unmap_sg()");
1218 spin_unlock_irqrestore(&ioc->res_lock, flags);
1223 static struct hppa_dma_ops sba_ops = {
1224 .dma_supported = sba_dma_supported,
1225 .alloc_consistent = sba_alloc_consistent,
1226 .alloc_noncoherent = sba_alloc_consistent,
1227 .free_consistent = sba_free_consistent,
1228 .map_single = sba_map_single,
1229 .unmap_single = sba_unmap_single,
1230 .map_sg = sba_map_sg,
1231 .unmap_sg = sba_unmap_sg,
1232 .dma_sync_single_for_cpu = NULL,
1233 .dma_sync_single_for_device = NULL,
1234 .dma_sync_sg_for_cpu = NULL,
1235 .dma_sync_sg_for_device = NULL,
1239 /**************************************************************************
1241 ** SBA PAT PDC support
1243 ** o call pdc_pat_cell_module()
1244 ** o store ranges in PCI "resource" structures
1246 **************************************************************************/
1249 sba_get_pat_resources(struct sba_device *sba_dev)
1253 ** TODO/REVISIT/FIXME: support for directed ranges requires calls to
1254 ** PAT PDC to program the SBA/LBA directed range registers...this
1255 ** burden may fall on the LBA code since it directly supports the
1256 ** PCI subsystem. It's not clear yet. - ggg
1258 PAT_MOD(mod)->mod_info.mod_pages = PAT_GET_MOD_PAGES(temp);
1260 PAT_MOD(mod)->mod_info.dvi = PAT_GET_DVI(temp);
1261 Tells where the dvi bits are located in the address.
1262 PAT_MOD(mod)->mod_info.ioc = PAT_GET_IOC(temp);
1268 /**************************************************************
1270 * Initialization and claim
1272 ***************************************************************/
1273 #define PIRANHA_ADDR_MASK 0x00160000UL /* bit 17,18,20 */
1274 #define PIRANHA_ADDR_VAL 0x00060000UL /* bit 17,18 on */
1276 sba_alloc_pdir(unsigned int pdir_size)
1278 unsigned long pdir_base;
1279 unsigned long pdir_order = get_order(pdir_size);
1281 pdir_base = __get_free_pages(GFP_KERNEL, pdir_order);
1282 if (NULL == (void *) pdir_base) {
1283 panic("%s() could not allocate I/O Page Table\n",
1287 /* If this is not PA8700 (PCX-W2)
1288 ** OR newer than ver 2.2
1289 ** OR in a system that doesn't need VINDEX bits from SBA,
1291 ** then we aren't exposed to the HW bug.
1293 if ( ((boot_cpu_data.pdc.cpuid >> 5) & 0x7f) != 0x13
1294 || (boot_cpu_data.pdc.versions > 0x202)
1295 || (boot_cpu_data.pdc.capabilities & 0x08L) )
1296 return (void *) pdir_base;
1299 * PA8700 (PCX-W2, aka piranha) silent data corruption fix
1301 * An interaction between PA8700 CPU (Ver 2.2 or older) and
1302 * Ike/Astro can cause silent data corruption. This is only
1303 * a problem if the I/O PDIR is located in memory such that
1304 * (little-endian) bits 17 and 18 are on and bit 20 is off.
1306 * Since the max IO Pdir size is 2MB, by cleverly allocating the
1307 * right physical address, we can either avoid (IOPDIR <= 1MB)
1308 * or minimize (2MB IO Pdir) the problem if we restrict the
1309 * IO Pdir to a maximum size of 2MB-128K (1902K).
1311 * Because we always allocate 2^N sized IO pdirs, either of the
1312 * "bad" regions will be the last 128K if at all. That's easy
1316 if (pdir_order <= (19-12)) {
1317 if (((virt_to_phys(pdir_base)+pdir_size-1) & PIRANHA_ADDR_MASK) == PIRANHA_ADDR_VAL) {
1318 /* allocate a new one on 512k alignment */
1319 unsigned long new_pdir = __get_free_pages(GFP_KERNEL, (19-12));
1320 /* release original */
1321 free_pages(pdir_base, pdir_order);
1323 pdir_base = new_pdir;
1325 /* release excess */
1326 while (pdir_order < (19-12)) {
1327 new_pdir += pdir_size;
1328 free_pages(new_pdir, pdir_order);
1336 ** Needs to be aligned on an "odd" 1MB boundary.
1338 unsigned long new_pdir = __get_free_pages(GFP_KERNEL, pdir_order+1); /* 2 or 4MB */
1340 /* release original */
1341 free_pages( pdir_base, pdir_order);
1343 /* release first 1MB */
1344 free_pages(new_pdir, 20-12);
1346 pdir_base = new_pdir + 1024*1024;
1348 if (pdir_order > (20-12)) {
1352 ** Flag tells init_bitmap() to mark bad 128k as used
1353 ** and to reduce the size by 128k.
1355 piranha_bad_128k = 1;
1357 new_pdir += 3*1024*1024;
1358 /* release last 1MB */
1359 free_pages(new_pdir, 20-12);
1361 /* release unusable 128KB */
1362 free_pages(new_pdir - 128*1024 , 17-12);
1364 pdir_size -= 128*1024;
1368 memset((void *) pdir_base, 0, pdir_size);
1369 return (void *) pdir_base;
1372 static struct device *next_device(struct klist_iter *i)
1374 struct klist_node * n = klist_next(i);
1375 return n ? container_of(n, struct device, knode_parent) : NULL;
1378 /* setup Mercury or Elroy IBASE/IMASK registers. */
1380 setup_ibase_imask(struct parisc_device *sba, struct ioc *ioc, int ioc_num)
1382 /* lba_set_iregs() is in drivers/parisc/lba_pci.c */
1383 extern void lba_set_iregs(struct parisc_device *, u32, u32);
1385 struct klist_iter i;
1387 klist_iter_init(&sba->dev.klist_children, &i);
1388 while ((dev = next_device(&i))) {
1389 struct parisc_device *lba = to_parisc_device(dev);
1390 int rope_num = (lba->hpa.start >> 13) & 0xf;
1391 if (rope_num >> 3 == ioc_num)
1392 lba_set_iregs(lba, ioc->ibase, ioc->imask);
1394 klist_iter_exit(&i);
1398 sba_ioc_init_pluto(struct parisc_device *sba, struct ioc *ioc, int ioc_num)
1400 u32 iova_space_mask;
1401 u32 iova_space_size;
1402 int iov_order, tcnfg;
1403 #ifdef SBA_AGP_SUPPORT
1407 ** Firmware programs the base and size of a "safe IOVA space"
1408 ** (one that doesn't overlap memory or LMMIO space) in the
1409 ** IBASE and IMASK registers.
1411 ioc->ibase = READ_REG(ioc->ioc_hpa + IOC_IBASE);
1412 iova_space_size = ~(READ_REG(ioc->ioc_hpa + IOC_IMASK) & 0xFFFFFFFFUL) + 1;
1414 if ((ioc->ibase < 0xfed00000UL) && ((ioc->ibase + iova_space_size) > 0xfee00000UL)) {
1415 printk("WARNING: IOV space overlaps local config and interrupt message, truncating\n");
1416 iova_space_size /= 2;
1420 ** iov_order is always based on a 1GB IOVA space since we want to
1421 ** turn on the other half for AGP GART.
1423 iov_order = get_order(iova_space_size >> (IOVP_SHIFT - PAGE_SHIFT));
1424 ioc->pdir_size = (iova_space_size / IOVP_SIZE) * sizeof(u64);
1426 DBG_INIT("%s() hpa 0x%p IOV %dMB (%d bits)\n",
1427 __FUNCTION__, ioc->ioc_hpa, iova_space_size >> 20,
1428 iov_order + PAGE_SHIFT);
1430 ioc->pdir_base = (void *) __get_free_pages(GFP_KERNEL,
1431 get_order(ioc->pdir_size));
1432 if (!ioc->pdir_base)
1433 panic("Couldn't allocate I/O Page Table\n");
1435 memset(ioc->pdir_base, 0, ioc->pdir_size);
1437 DBG_INIT("%s() pdir %p size %x\n",
1438 __FUNCTION__, ioc->pdir_base, ioc->pdir_size);
1440 #ifdef SBA_HINT_SUPPORT
1441 ioc->hint_shift_pdir = iov_order + PAGE_SHIFT;
1442 ioc->hint_mask_pdir = ~(0x3 << (iov_order + PAGE_SHIFT));
1444 DBG_INIT(" hint_shift_pdir %x hint_mask_pdir %lx\n",
1445 ioc->hint_shift_pdir, ioc->hint_mask_pdir);
1448 WARN_ON((((unsigned long) ioc->pdir_base) & PAGE_MASK) != (unsigned long) ioc->pdir_base);
1449 WRITE_REG(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE);
1451 /* build IMASK for IOC and Elroy */
1452 iova_space_mask = 0xffffffff;
1453 iova_space_mask <<= (iov_order + PAGE_SHIFT);
1454 ioc->imask = iova_space_mask;
1456 ioc->iovp_mask = ~(iova_space_mask + PAGE_SIZE - 1);
1458 sba_dump_tlb(ioc->ioc_hpa);
1460 setup_ibase_imask(sba, ioc, ioc_num);
1462 WRITE_REG(ioc->imask, ioc->ioc_hpa + IOC_IMASK);
1466 ** Setting the upper bits makes checking for bypass addresses
1467 ** a little faster later on.
1469 ioc->imask |= 0xFFFFFFFF00000000UL;
1472 /* Set I/O PDIR Page size to system page size */
1473 switch (PAGE_SHIFT) {
1474 case 12: tcnfg = 0; break; /* 4K */
1475 case 13: tcnfg = 1; break; /* 8K */
1476 case 14: tcnfg = 2; break; /* 16K */
1477 case 16: tcnfg = 3; break; /* 64K */
1479 panic(__FILE__ "Unsupported system page size %d",
1483 WRITE_REG(tcnfg, ioc->ioc_hpa + IOC_TCNFG);
1486 ** Program the IOC's ibase and enable IOVA translation
1487 ** Bit zero == enable bit.
1489 WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa + IOC_IBASE);
1492 ** Clear I/O TLB of any possible entries.
1493 ** (Yes. This is a bit paranoid...but so what)
1495 WRITE_REG(ioc->ibase | 31, ioc->ioc_hpa + IOC_PCOM);
1497 #ifdef SBA_AGP_SUPPORT
1499 ** If an AGP device is present, only use half of the IOV space
1500 ** for PCI DMA. Unfortunately we can't know ahead of time
1501 ** whether GART support will actually be used, for now we
1502 ** can just key on any AGP device found in the system.
1503 ** We program the next pdir index after we stop w/ a key for
1504 ** the GART code to handshake on.
1507 for (lba = sba->child; lba; lba = lba->sibling) {
1508 if (IS_QUICKSILVER(lba))
1513 DBG_INIT("%s: Reserving half of IOVA space for AGP GART support\n", __FUNCTION__);
1514 ioc->pdir_size /= 2;
1515 ((u64 *)ioc->pdir_base)[PDIR_INDEX(iova_space_size/2)] = SBA_IOMMU_COOKIE;
1517 DBG_INIT("%s: No GART needed - no AGP controller found\n", __FUNCTION__);
1524 sba_ioc_init(struct parisc_device *sba, struct ioc *ioc, int ioc_num)
1526 u32 iova_space_size, iova_space_mask;
1527 unsigned int pdir_size, iov_order;
1530 ** Determine IOVA Space size from memory size.
1532 ** Ideally, PCI drivers would register the maximum number
1533 ** of DMA they can have outstanding for each device they
1534 ** own. Next best thing would be to guess how much DMA
1535 ** can be outstanding based on PCI Class/sub-class. Both
1536 ** methods still require some "extra" to support PCI
1537 ** Hot-Plug/Removal of PCI cards. (aka PCI OLARD).
1539 ** While we have 32-bits "IOVA" space, top two 2 bits are used
1540 ** for DMA hints - ergo only 30 bits max.
1543 iova_space_size = (u32) (num_physpages/global_ioc_cnt);
1545 /* limit IOVA space size to 1MB-1GB */
1546 if (iova_space_size < (1 << (20 - PAGE_SHIFT))) {
1547 iova_space_size = 1 << (20 - PAGE_SHIFT);
1549 else if (iova_space_size > (1 << (30 - PAGE_SHIFT))) {
1550 iova_space_size = 1 << (30 - PAGE_SHIFT);
1554 ** iova space must be log2() in size.
1555 ** thus, pdir/res_map will also be log2().
1556 ** PIRANHA BUG: Exception is when IO Pdir is 2MB (gets reduced)
1558 iov_order = get_order(iova_space_size << PAGE_SHIFT);
1560 /* iova_space_size is now bytes, not pages */
1561 iova_space_size = 1 << (iov_order + PAGE_SHIFT);
1563 ioc->pdir_size = pdir_size = (iova_space_size/IOVP_SIZE) * sizeof(u64);
1565 DBG_INIT("%s() hpa 0x%lx mem %ldMB IOV %dMB (%d bits)\n",
1568 (unsigned long) num_physpages >> (20 - PAGE_SHIFT),
1569 iova_space_size>>20,
1570 iov_order + PAGE_SHIFT);
1572 ioc->pdir_base = sba_alloc_pdir(pdir_size);
1574 DBG_INIT("%s() pdir %p size %x\n",
1575 __FUNCTION__, ioc->pdir_base, pdir_size);
1577 #ifdef SBA_HINT_SUPPORT
1578 /* FIXME : DMA HINTs not used */
1579 ioc->hint_shift_pdir = iov_order + PAGE_SHIFT;
1580 ioc->hint_mask_pdir = ~(0x3 << (iov_order + PAGE_SHIFT));
1582 DBG_INIT(" hint_shift_pdir %x hint_mask_pdir %lx\n",
1583 ioc->hint_shift_pdir, ioc->hint_mask_pdir);
1586 WRITE_REG64(virt_to_phys(ioc->pdir_base), ioc->ioc_hpa + IOC_PDIR_BASE);
1588 /* build IMASK for IOC and Elroy */
1589 iova_space_mask = 0xffffffff;
1590 iova_space_mask <<= (iov_order + PAGE_SHIFT);
1593 ** On C3000 w/512MB mem, HP-UX 10.20 reports:
1594 ** ibase=0, imask=0xFE000000, size=0x2000000.
1597 ioc->imask = iova_space_mask; /* save it */
1599 ioc->iovp_mask = ~(iova_space_mask + PAGE_SIZE - 1);
1602 DBG_INIT("%s() IOV base 0x%lx mask 0x%0lx\n",
1603 __FUNCTION__, ioc->ibase, ioc->imask);
1606 ** FIXME: Hint registers are programmed with default hint
1607 ** values during boot, so hints should be sane even if we
1608 ** can't reprogram them the way drivers want.
1611 setup_ibase_imask(sba, ioc, ioc_num);
1614 ** Program the IOC's ibase and enable IOVA translation
1616 WRITE_REG(ioc->ibase | 1, ioc->ioc_hpa+IOC_IBASE);
1617 WRITE_REG(ioc->imask, ioc->ioc_hpa+IOC_IMASK);
1619 /* Set I/O PDIR Page size to 4K */
1620 WRITE_REG(0, ioc->ioc_hpa+IOC_TCNFG);
1623 ** Clear I/O TLB of any possible entries.
1624 ** (Yes. This is a bit paranoid...but so what)
1626 WRITE_REG(0 | 31, ioc->ioc_hpa+IOC_PCOM);
1628 ioc->ibase = 0; /* used by SBA_IOVA and related macros */
1630 DBG_INIT("%s() DONE\n", __FUNCTION__);
1635 /**************************************************************************
1637 ** SBA initialization code (HW and SW)
1639 ** o identify SBA chip itself
1640 ** o initialize SBA chip modes (HardFail)
1641 ** o initialize SBA chip modes (HardFail)
1642 ** o FIXME: initialize DMA hints for reasonable defaults
1644 **************************************************************************/
1646 static void __iomem *ioc_remap(struct sba_device *sba_dev, unsigned int offset)
1648 return ioremap_nocache(sba_dev->dev->hpa.start + offset, SBA_FUNC_SIZE);
1651 static void sba_hw_init(struct sba_device *sba_dev)
1657 if (!is_pdc_pat()) {
1658 /* Shutdown the USB controller on Astro-based workstations.
1659 ** Once we reprogram the IOMMU, the next DMA performed by
1660 ** USB will HPMC the box. USB is only enabled if a
1661 ** keyboard is present and found.
1663 ** With serial console, j6k v5.0 firmware says:
1664 ** mem_kbd hpa 0xfee003f8 sba 0x0 pad 0x0 cl_class 0x7
1666 ** FIXME: Using GFX+USB console at power up but direct
1667 ** linux to serial console is still broken.
1668 ** USB could generate DMA so we must reset USB.
1669 ** The proper sequence would be:
1670 ** o block console output
1671 ** o reset USB device
1672 ** o reprogram serial port
1673 ** o unblock console output
1675 if (PAGE0->mem_kbd.cl_class == CL_KEYBD) {
1676 pdc_io_reset_devices();
1683 printk("sba_hw_init(): mem_boot 0x%x 0x%x 0x%x 0x%x\n", PAGE0->mem_boot.hpa,
1684 PAGE0->mem_boot.spa, PAGE0->mem_boot.pad, PAGE0->mem_boot.cl_class);
1687 ** Need to deal with DMA from LAN.
1688 ** Maybe use page zero boot device as a handle to talk
1689 ** to PDC about which device to shutdown.
1691 ** Netbooting, j6k v5.0 firmware says:
1692 ** mem_boot hpa 0xf4008000 sba 0x0 pad 0x0 cl_class 0x1002
1693 ** ARGH! invalid class.
1695 if ((PAGE0->mem_boot.cl_class != CL_RANDOM)
1696 && (PAGE0->mem_boot.cl_class != CL_SEQU)) {
1701 if (!IS_PLUTO(sba_dev->iodc)) {
1702 ioc_ctl = READ_REG(sba_dev->sba_hpa+IOC_CTRL);
1703 DBG_INIT("%s() hpa 0x%lx ioc_ctl 0x%Lx ->",
1704 __FUNCTION__, sba_dev->sba_hpa, ioc_ctl);
1705 ioc_ctl &= ~(IOC_CTRL_RM | IOC_CTRL_NC | IOC_CTRL_CE);
1706 ioc_ctl |= IOC_CTRL_DD | IOC_CTRL_D4 | IOC_CTRL_TC;
1707 /* j6700 v1.6 firmware sets 0x294f */
1708 /* A500 firmware sets 0x4d */
1710 WRITE_REG(ioc_ctl, sba_dev->sba_hpa+IOC_CTRL);
1712 #ifdef DEBUG_SBA_INIT
1713 ioc_ctl = READ_REG64(sba_dev->sba_hpa+IOC_CTRL);
1714 DBG_INIT(" 0x%Lx\n", ioc_ctl);
1718 if (IS_ASTRO(sba_dev->iodc)) {
1720 sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, ASTRO_IOC_OFFSET);
1723 sba_dev->chip_resv.name = "Astro Intr Ack";
1724 sba_dev->chip_resv.start = PCI_F_EXTEND | 0xfef00000UL;
1725 sba_dev->chip_resv.end = PCI_F_EXTEND | (0xff000000UL - 1) ;
1726 err = request_resource(&iomem_resource, &(sba_dev->chip_resv));
1729 } else if (IS_PLUTO(sba_dev->iodc)) {
1732 sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, PLUTO_IOC_OFFSET);
1735 sba_dev->chip_resv.name = "Pluto Intr/PIOP/VGA";
1736 sba_dev->chip_resv.start = PCI_F_EXTEND | 0xfee00000UL;
1737 sba_dev->chip_resv.end = PCI_F_EXTEND | (0xff200000UL - 1);
1738 err = request_resource(&iomem_resource, &(sba_dev->chip_resv));
1741 sba_dev->iommu_resv.name = "IOVA Space";
1742 sba_dev->iommu_resv.start = 0x40000000UL;
1743 sba_dev->iommu_resv.end = 0x50000000UL - 1;
1744 err = request_resource(&iomem_resource, &(sba_dev->iommu_resv));
1748 sba_dev->ioc[0].ioc_hpa = ioc_remap(sba_dev, IKE_IOC_OFFSET(0));
1749 sba_dev->ioc[1].ioc_hpa = ioc_remap(sba_dev, IKE_IOC_OFFSET(1));
1752 /* TODO - LOOKUP Ike/Stretch chipset mem map */
1754 /* XXX: What about Reo Grande? */
1756 sba_dev->num_ioc = num_ioc;
1757 for (i = 0; i < num_ioc; i++) {
1758 void __iomem *ioc_hpa = sba_dev->ioc[i].ioc_hpa;
1761 for (j=0; j < sizeof(u64) * ROPES_PER_IOC; j+=sizeof(u64)) {
1764 * Clear ROPE(N)_CONFIG AO bit.
1765 * Disables "NT Ordering" (~= !"Relaxed Ordering")
1766 * Overrides bit 1 in DMA Hint Sets.
1767 * Improves netperf UDP_STREAM by ~10% for bcm5701.
1769 if (IS_PLUTO(sba_dev->iodc)) {
1770 void __iomem *rope_cfg;
1771 unsigned long cfg_val;
1773 rope_cfg = ioc_hpa + IOC_ROPE0_CFG + j;
1774 cfg_val = READ_REG(rope_cfg);
1775 cfg_val &= ~IOC_ROPE_AO;
1776 WRITE_REG(cfg_val, rope_cfg);
1780 ** Make sure the box crashes on rope errors.
1782 WRITE_REG(HF_ENABLE, ioc_hpa + ROPE0_CTL + j);
1785 /* flush out the last writes */
1786 READ_REG(sba_dev->ioc[i].ioc_hpa + ROPE7_CTL);
1788 DBG_INIT(" ioc[%d] ROPE_CFG 0x%Lx ROPE_DBG 0x%Lx\n",
1790 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x40),
1791 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x50)
1793 DBG_INIT(" STATUS_CONTROL 0x%Lx FLUSH_CTRL 0x%Lx\n",
1794 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x108),
1795 READ_REG(sba_dev->ioc[i].ioc_hpa + 0x400)
1798 if (IS_PLUTO(sba_dev->iodc)) {
1799 sba_ioc_init_pluto(sba_dev->dev, &(sba_dev->ioc[i]), i);
1801 sba_ioc_init(sba_dev->dev, &(sba_dev->ioc[i]), i);
1807 sba_common_init(struct sba_device *sba_dev)
1811 /* add this one to the head of the list (order doesn't matter)
1812 ** This will be useful for debugging - especially if we get coredumps
1814 sba_dev->next = sba_list;
1817 for(i=0; i< sba_dev->num_ioc; i++) {
1819 #ifdef DEBUG_DMB_TRAP
1820 extern void iterate_pages(unsigned long , unsigned long ,
1821 void (*)(pte_t * , unsigned long),
1823 void set_data_memory_break(pte_t * , unsigned long);
1825 /* resource map size dictated by pdir_size */
1826 res_size = sba_dev->ioc[i].pdir_size/sizeof(u64); /* entries */
1828 /* Second part of PIRANHA BUG */
1829 if (piranha_bad_128k) {
1830 res_size -= (128*1024)/sizeof(u64);
1833 res_size >>= 3; /* convert bit count to byte count */
1834 DBG_INIT("%s() res_size 0x%x\n",
1835 __FUNCTION__, res_size);
1837 sba_dev->ioc[i].res_size = res_size;
1838 sba_dev->ioc[i].res_map = (char *) __get_free_pages(GFP_KERNEL, get_order(res_size));
1840 #ifdef DEBUG_DMB_TRAP
1841 iterate_pages( sba_dev->ioc[i].res_map, res_size,
1842 set_data_memory_break, 0);
1845 if (NULL == sba_dev->ioc[i].res_map)
1847 panic("%s:%s() could not allocate resource map\n",
1848 __FILE__, __FUNCTION__ );
1851 memset(sba_dev->ioc[i].res_map, 0, res_size);
1852 /* next available IOVP - circular search */
1853 sba_dev->ioc[i].res_hint = (unsigned long *)
1854 &(sba_dev->ioc[i].res_map[L1_CACHE_BYTES]);
1856 #ifdef ASSERT_PDIR_SANITY
1857 /* Mark first bit busy - ie no IOVA 0 */
1858 sba_dev->ioc[i].res_map[0] = 0x80;
1859 sba_dev->ioc[i].pdir_base[0] = 0xeeffc0addbba0080ULL;
1862 /* Third (and last) part of PIRANHA BUG */
1863 if (piranha_bad_128k) {
1864 /* region from +1408K to +1536 is un-usable. */
1866 int idx_start = (1408*1024/sizeof(u64)) >> 3;
1867 int idx_end = (1536*1024/sizeof(u64)) >> 3;
1868 long *p_start = (long *) &(sba_dev->ioc[i].res_map[idx_start]);
1869 long *p_end = (long *) &(sba_dev->ioc[i].res_map[idx_end]);
1871 /* mark that part of the io pdir busy */
1872 while (p_start < p_end)
1877 #ifdef DEBUG_DMB_TRAP
1878 iterate_pages( sba_dev->ioc[i].res_map, res_size,
1879 set_data_memory_break, 0);
1880 iterate_pages( sba_dev->ioc[i].pdir_base, sba_dev->ioc[i].pdir_size,
1881 set_data_memory_break, 0);
1884 DBG_INIT("%s() %d res_map %x %p\n",
1885 __FUNCTION__, i, res_size, sba_dev->ioc[i].res_map);
1888 spin_lock_init(&sba_dev->sba_lock);
1889 ioc_needs_fdc = boot_cpu_data.pdc.capabilities & PDC_MODEL_IOPDIR_FDC;
1891 #ifdef DEBUG_SBA_INIT
1893 * If the PDC_MODEL capabilities has Non-coherent IO-PDIR bit set
1894 * (bit #61, big endian), we have to flush and sync every time
1895 * IO-PDIR is changed in Ike/Astro.
1897 if (ioc_needs_fdc) {
1898 printk(KERN_INFO MODULE_NAME " FDC/SYNC required.\n");
1900 printk(KERN_INFO MODULE_NAME " IOC has cache coherent PDIR.\n");
1905 #ifdef CONFIG_PROC_FS
1906 static int sba_proc_info(struct seq_file *m, void *p)
1908 struct sba_device *sba_dev = sba_list;
1909 struct ioc *ioc = &sba_dev->ioc[0]; /* FIXME: Multi-IOC support! */
1910 int total_pages = (int) (ioc->res_size << 3); /* 8 bits per byte */
1911 #ifdef SBA_COLLECT_STATS
1912 unsigned long avg = 0, min, max;
1916 len += seq_printf(m, "%s rev %d.%d\n",
1918 (sba_dev->hw_rev & 0x7) + 1,
1919 (sba_dev->hw_rev & 0x18) >> 3
1921 len += seq_printf(m, "IO PDIR size : %d bytes (%d entries)\n",
1922 (int) ((ioc->res_size << 3) * sizeof(u64)), /* 8 bits/byte */
1925 len += seq_printf(m, "Resource bitmap : %d bytes (%d pages)\n",
1926 ioc->res_size, ioc->res_size << 3); /* 8 bits per byte */
1928 len += seq_printf(m, "LMMIO_BASE/MASK/ROUTE %08x %08x %08x\n",
1929 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_BASE),
1930 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_MASK),
1931 READ_REG32(sba_dev->sba_hpa + LMMIO_DIST_ROUTE)
1935 len += seq_printf(m, "DIR%d_BASE/MASK/ROUTE %08x %08x %08x\n", i,
1936 READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_BASE + i*0x18),
1937 READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_MASK + i*0x18),
1938 READ_REG32(sba_dev->sba_hpa + LMMIO_DIRECT0_ROUTE + i*0x18)
1941 #ifdef SBA_COLLECT_STATS
1942 len += seq_printf(m, "IO PDIR entries : %ld free %ld used (%d%%)\n",
1943 total_pages - ioc->used_pages, ioc->used_pages,
1944 (int) (ioc->used_pages * 100 / total_pages));
1946 min = max = ioc->avg_search[0];
1947 for (i = 0; i < SBA_SEARCH_SAMPLE; i++) {
1948 avg += ioc->avg_search[i];
1949 if (ioc->avg_search[i] > max) max = ioc->avg_search[i];
1950 if (ioc->avg_search[i] < min) min = ioc->avg_search[i];
1952 avg /= SBA_SEARCH_SAMPLE;
1953 len += seq_printf(m, " Bitmap search : %ld/%ld/%ld (min/avg/max CPU Cycles)\n",
1956 len += seq_printf(m, "pci_map_single(): %12ld calls %12ld pages (avg %d/1000)\n",
1957 ioc->msingle_calls, ioc->msingle_pages,
1958 (int) ((ioc->msingle_pages * 1000)/ioc->msingle_calls));
1960 /* KLUGE - unmap_sg calls unmap_single for each mapped page */
1961 min = ioc->usingle_calls;
1962 max = ioc->usingle_pages - ioc->usg_pages;
1963 len += seq_printf(m, "pci_unmap_single: %12ld calls %12ld pages (avg %d/1000)\n",
1964 min, max, (int) ((max * 1000)/min));
1966 len += seq_printf(m, "pci_map_sg() : %12ld calls %12ld pages (avg %d/1000)\n",
1967 ioc->msg_calls, ioc->msg_pages,
1968 (int) ((ioc->msg_pages * 1000)/ioc->msg_calls));
1970 len += seq_printf(m, "pci_unmap_sg() : %12ld calls %12ld pages (avg %d/1000)\n",
1971 ioc->usg_calls, ioc->usg_pages,
1972 (int) ((ioc->usg_pages * 1000)/ioc->usg_calls));
1979 sba_proc_open(struct inode *i, struct file *f)
1981 return single_open(f, &sba_proc_info, NULL);
1984 static struct file_operations sba_proc_fops = {
1985 .owner = THIS_MODULE,
1986 .open = sba_proc_open,
1988 .llseek = seq_lseek,
1989 .release = single_release,
1993 sba_proc_bitmap_info(struct seq_file *m, void *p)
1995 struct sba_device *sba_dev = sba_list;
1996 struct ioc *ioc = &sba_dev->ioc[0]; /* FIXME: Multi-IOC support! */
1997 unsigned int *res_ptr = (unsigned int *)ioc->res_map;
2000 for (i = 0; i < (ioc->res_size/sizeof(unsigned int)); ++i, ++res_ptr) {
2002 len += seq_printf(m, "\n ");
2003 len += seq_printf(m, " %08x", *res_ptr);
2005 len += seq_printf(m, "\n");
2011 sba_proc_bitmap_open(struct inode *i, struct file *f)
2013 return single_open(f, &sba_proc_bitmap_info, NULL);
2016 static struct file_operations sba_proc_bitmap_fops = {
2017 .owner = THIS_MODULE,
2018 .open = sba_proc_bitmap_open,
2020 .llseek = seq_lseek,
2021 .release = single_release,
2023 #endif /* CONFIG_PROC_FS */
2025 static struct parisc_device_id sba_tbl[] = {
2026 { HPHW_IOA, HVERSION_REV_ANY_ID, ASTRO_RUNWAY_PORT, 0xb },
2027 { HPHW_BCPORT, HVERSION_REV_ANY_ID, IKE_MERCED_PORT, 0xc },
2028 { HPHW_BCPORT, HVERSION_REV_ANY_ID, REO_MERCED_PORT, 0xc },
2029 { HPHW_BCPORT, HVERSION_REV_ANY_ID, REOG_MERCED_PORT, 0xc },
2030 { HPHW_IOA, HVERSION_REV_ANY_ID, PLUTO_MCKINLEY_PORT, 0xc },
2034 int sba_driver_callback(struct parisc_device *);
2036 static struct parisc_driver sba_driver = {
2037 .name = MODULE_NAME,
2038 .id_table = sba_tbl,
2039 .probe = sba_driver_callback,
2043 ** Determine if sba should claim this chip (return 0) or not (return 1).
2044 ** If so, initialize the chip and tell other partners in crime they
2048 sba_driver_callback(struct parisc_device *dev)
2050 struct sba_device *sba_dev;
2054 void __iomem *sba_addr = ioremap_nocache(dev->hpa.start, SBA_FUNC_SIZE);
2055 struct proc_dir_entry *info_entry, *bitmap_entry, *root;
2057 sba_dump_ranges(sba_addr);
2059 /* Read HW Rev First */
2060 func_class = READ_REG(sba_addr + SBA_FCLASS);
2062 if (IS_ASTRO(&dev->id)) {
2063 unsigned long fclass;
2064 static char astro_rev[]="Astro ?.?";
2066 /* Astro is broken...Read HW Rev First */
2067 fclass = READ_REG(sba_addr);
2069 astro_rev[6] = '1' + (char) (fclass & 0x7);
2070 astro_rev[8] = '0' + (char) ((fclass & 0x18) >> 3);
2071 version = astro_rev;
2073 } else if (IS_IKE(&dev->id)) {
2074 static char ike_rev[] = "Ike rev ?";
2075 ike_rev[8] = '0' + (char) (func_class & 0xff);
2077 } else if (IS_PLUTO(&dev->id)) {
2078 static char pluto_rev[]="Pluto ?.?";
2079 pluto_rev[6] = '0' + (char) ((func_class & 0xf0) >> 4);
2080 pluto_rev[8] = '0' + (char) (func_class & 0x0f);
2081 version = pluto_rev;
2083 static char reo_rev[] = "REO rev ?";
2084 reo_rev[8] = '0' + (char) (func_class & 0xff);
2088 if (!global_ioc_cnt) {
2089 global_ioc_cnt = count_parisc_driver(&sba_driver);
2091 /* Astro and Pluto have one IOC per SBA */
2092 if ((!IS_ASTRO(&dev->id)) || (!IS_PLUTO(&dev->id)))
2093 global_ioc_cnt *= 2;
2096 printk(KERN_INFO "%s found %s at 0x%lx\n",
2097 MODULE_NAME, version, dev->hpa.start);
2099 sba_dev = kzalloc(sizeof(struct sba_device), GFP_KERNEL);
2101 printk(KERN_ERR MODULE_NAME " - couldn't alloc sba_device\n");
2105 parisc_set_drvdata(dev, sba_dev);
2107 for(i=0; i<MAX_IOC; i++)
2108 spin_lock_init(&(sba_dev->ioc[i].res_lock));
2111 sba_dev->hw_rev = func_class;
2112 sba_dev->iodc = &dev->id;
2113 sba_dev->name = dev->name;
2114 sba_dev->sba_hpa = sba_addr;
2116 sba_get_pat_resources(sba_dev);
2117 sba_hw_init(sba_dev);
2118 sba_common_init(sba_dev);
2120 hppa_dma_ops = &sba_ops;
2122 #ifdef CONFIG_PROC_FS
2123 switch (dev->id.hversion) {
2124 case PLUTO_MCKINLEY_PORT:
2125 root = proc_mckinley_root;
2127 case ASTRO_RUNWAY_PORT:
2128 case IKE_MERCED_PORT:
2130 root = proc_runway_root;
2134 info_entry = create_proc_entry("sba_iommu", 0, root);
2135 bitmap_entry = create_proc_entry("sba_iommu-bitmap", 0, root);
2138 info_entry->proc_fops = &sba_proc_fops;
2141 bitmap_entry->proc_fops = &sba_proc_bitmap_fops;
2144 parisc_vmerge_boundary = IOVP_SIZE;
2145 parisc_vmerge_max_size = IOVP_SIZE * BITS_PER_LONG;
2151 ** One time initialization to let the world know the SBA was found.
2152 ** This is the only routine which is NOT static.
2153 ** Must be called exactly once before pci_init().
2155 void __init sba_init(void)
2157 register_parisc_driver(&sba_driver);
2162 * sba_get_iommu - Assign the iommu pointer for the pci bus controller.
2163 * @dev: The parisc device.
2165 * Returns the appropriate IOMMU data for the given parisc PCI controller.
2166 * This is cached and used later for PCI DMA Mapping.
2168 void * sba_get_iommu(struct parisc_device *pci_hba)
2170 struct parisc_device *sba_dev = parisc_parent(pci_hba);
2171 struct sba_device *sba = sba_dev->dev.driver_data;
2172 char t = sba_dev->id.hw_type;
2173 int iocnum = (pci_hba->hw_path >> 3); /* rope # */
2175 WARN_ON((t != HPHW_IOA) && (t != HPHW_BCPORT));
2177 return &(sba->ioc[iocnum]);
2182 * sba_directed_lmmio - return first directed LMMIO range routed to rope
2183 * @pa_dev: The parisc device.
2184 * @r: resource PCI host controller wants start/end fields assigned.
2186 * For the given parisc PCI controller, determine if any direct ranges
2187 * are routed down the corresponding rope.
2189 void sba_directed_lmmio(struct parisc_device *pci_hba, struct resource *r)
2191 struct parisc_device *sba_dev = parisc_parent(pci_hba);
2192 struct sba_device *sba = sba_dev->dev.driver_data;
2193 char t = sba_dev->id.hw_type;
2195 int rope = (pci_hba->hw_path & (ROPES_PER_IOC-1)); /* rope # */
2197 BUG_ON((t!=HPHW_IOA) && (t!=HPHW_BCPORT));
2199 r->start = r->end = 0;
2201 /* Astro has 4 directed ranges. Not sure about Ike/Pluto/et al */
2202 for (i=0; i<4; i++) {
2204 void __iomem *reg = sba->sba_hpa + i*0x18;
2206 base = READ_REG32(reg + LMMIO_DIRECT0_BASE);
2207 if ((base & 1) == 0)
2208 continue; /* not enabled */
2210 size = READ_REG32(reg + LMMIO_DIRECT0_ROUTE);
2212 if ((size & (ROPES_PER_IOC-1)) != rope)
2213 continue; /* directed down different rope */
2215 r->start = (base & ~1UL) | PCI_F_EXTEND;
2216 size = ~ READ_REG32(reg + LMMIO_DIRECT0_MASK);
2217 r->end = r->start + size;
2223 * sba_distributed_lmmio - return portion of distributed LMMIO range
2224 * @pa_dev: The parisc device.
2225 * @r: resource PCI host controller wants start/end fields assigned.
2227 * For the given parisc PCI controller, return portion of distributed LMMIO
2228 * range. The distributed LMMIO is always present and it's just a question
2229 * of the base address and size of the range.
2231 void sba_distributed_lmmio(struct parisc_device *pci_hba, struct resource *r )
2233 struct parisc_device *sba_dev = parisc_parent(pci_hba);
2234 struct sba_device *sba = sba_dev->dev.driver_data;
2235 char t = sba_dev->id.hw_type;
2237 int rope = (pci_hba->hw_path & (ROPES_PER_IOC-1)); /* rope # */
2239 BUG_ON((t!=HPHW_IOA) && (t!=HPHW_BCPORT));
2241 r->start = r->end = 0;
2243 base = READ_REG32(sba->sba_hpa + LMMIO_DIST_BASE);
2244 if ((base & 1) == 0) {
2245 BUG(); /* Gah! Distr Range wasn't enabled! */
2249 r->start = (base & ~1UL) | PCI_F_EXTEND;
2251 size = (~READ_REG32(sba->sba_hpa + LMMIO_DIST_MASK)) / ROPES_PER_IOC;
2252 r->start += rope * (size + 1); /* adjust base for this rope */
2253 r->end = r->start + size;