1 /* pci_psycho.c: PSYCHO/U2P specific PCI controller support.
3 * Copyright (C) 1997, 1998, 1999, 2007 David S. Miller (davem@davemloft.net)
4 * Copyright (C) 1998, 1999 Eddie C. Dost (ecd@skynet.be)
5 * Copyright (C) 1999 Jakub Jelinek (jakub@redhat.com)
8 #include <linux/kernel.h>
9 #include <linux/types.h>
10 #include <linux/pci.h>
11 #include <linux/init.h>
12 #include <linux/slab.h>
13 #include <linux/interrupt.h>
14 #include <linux/of_device.h>
16 #include <asm/iommu.h>
18 #include <asm/starfire.h>
20 #include <asm/oplib.h>
23 #include "iommu_common.h"
25 /* All PSYCHO registers are 64-bits. The following accessor
26 * routines are how they are accessed. The REG parameter
27 * is a physical address.
29 #define psycho_read(__reg) \
31 __asm__ __volatile__("ldxa [%1] %2, %0" \
33 : "r" (__reg), "i" (ASI_PHYS_BYPASS_EC_E) \
37 #define psycho_write(__reg, __val) \
38 __asm__ __volatile__("stxa %0, [%1] %2" \
40 : "r" (__val), "r" (__reg), \
41 "i" (ASI_PHYS_BYPASS_EC_E) \
44 /* Misc. PSYCHO PCI controller register offsets and definitions. */
45 #define PSYCHO_CONTROL 0x0010UL
46 #define PSYCHO_CONTROL_IMPL 0xf000000000000000UL /* Implementation of this PSYCHO*/
47 #define PSYCHO_CONTROL_VER 0x0f00000000000000UL /* Version of this PSYCHO */
48 #define PSYCHO_CONTROL_MID 0x00f8000000000000UL /* UPA Module ID of PSYCHO */
49 #define PSYCHO_CONTROL_IGN 0x0007c00000000000UL /* Interrupt Group Number */
50 #define PSYCHO_CONTROL_RESV 0x00003ffffffffff0UL /* Reserved */
51 #define PSYCHO_CONTROL_APCKEN 0x0000000000000008UL /* Address Parity Check Enable */
52 #define PSYCHO_CONTROL_APERR 0x0000000000000004UL /* Incoming System Addr Parerr */
53 #define PSYCHO_CONTROL_IAP 0x0000000000000002UL /* Invert UPA Parity */
54 #define PSYCHO_CONTROL_MODE 0x0000000000000001UL /* PSYCHO clock mode */
55 #define PSYCHO_PCIA_CTRL 0x2000UL
56 #define PSYCHO_PCIB_CTRL 0x4000UL
57 #define PSYCHO_PCICTRL_RESV1 0xfffffff000000000UL /* Reserved */
58 #define PSYCHO_PCICTRL_SBH_ERR 0x0000000800000000UL /* Streaming byte hole error */
59 #define PSYCHO_PCICTRL_SERR 0x0000000400000000UL /* SERR signal asserted */
60 #define PSYCHO_PCICTRL_SPEED 0x0000000200000000UL /* PCI speed (1 is U2P clock) */
61 #define PSYCHO_PCICTRL_RESV2 0x00000001ffc00000UL /* Reserved */
62 #define PSYCHO_PCICTRL_ARB_PARK 0x0000000000200000UL /* PCI arbitration parking */
63 #define PSYCHO_PCICTRL_RESV3 0x00000000001ff800UL /* Reserved */
64 #define PSYCHO_PCICTRL_SBH_INT 0x0000000000000400UL /* Streaming byte hole int enab */
65 #define PSYCHO_PCICTRL_WEN 0x0000000000000200UL /* Power Mgmt Wake Enable */
66 #define PSYCHO_PCICTRL_EEN 0x0000000000000100UL /* PCI Error Interrupt Enable */
67 #define PSYCHO_PCICTRL_RESV4 0x00000000000000c0UL /* Reserved */
68 #define PSYCHO_PCICTRL_AEN 0x000000000000003fUL /* PCI DVMA Arbitration Enable */
70 /* U2P Programmer's Manual, page 13-55, configuration space
73 * 32 24 23 16 15 11 10 8 7 2 1 0
74 * ---------------------------------------------------------
75 * |0 0 0 0 0 0 0 0 1| bus | device | function | reg | 0 0 |
76 * ---------------------------------------------------------
78 #define PSYCHO_CONFIG_BASE(PBM) \
79 ((PBM)->config_space | (1UL << 24))
80 #define PSYCHO_CONFIG_ENCODE(BUS, DEVFN, REG) \
81 (((unsigned long)(BUS) << 16) | \
82 ((unsigned long)(DEVFN) << 8) | \
83 ((unsigned long)(REG)))
85 static void *psycho_pci_config_mkaddr(struct pci_pbm_info *pbm,
93 (PSYCHO_CONFIG_BASE(pbm) |
94 PSYCHO_CONFIG_ENCODE(bus, devfn, where));
97 /* PSYCHO error handling support. */
98 enum psycho_error_type {
99 UE_ERR, CE_ERR, PCI_ERR
102 /* Helper function of IOMMU error checking, which checks out
103 * the state of the streaming buffers. The IOMMU lock is
104 * held when this is called.
106 * For the PCI error case we know which PBM (and thus which
107 * streaming buffer) caused the error, but for the uncorrectable
108 * error case we do not. So we always check both streaming caches.
110 #define PSYCHO_STRBUF_CONTROL_A 0x2800UL
111 #define PSYCHO_STRBUF_CONTROL_B 0x4800UL
112 #define PSYCHO_STRBUF_CTRL_LPTR 0x00000000000000f0UL /* LRU Lock Pointer */
113 #define PSYCHO_STRBUF_CTRL_LENAB 0x0000000000000008UL /* LRU Lock Enable */
114 #define PSYCHO_STRBUF_CTRL_RRDIS 0x0000000000000004UL /* Rerun Disable */
115 #define PSYCHO_STRBUF_CTRL_DENAB 0x0000000000000002UL /* Diagnostic Mode Enable */
116 #define PSYCHO_STRBUF_CTRL_ENAB 0x0000000000000001UL /* Streaming Buffer Enable */
117 #define PSYCHO_STRBUF_FLUSH_A 0x2808UL
118 #define PSYCHO_STRBUF_FLUSH_B 0x4808UL
119 #define PSYCHO_STRBUF_FSYNC_A 0x2810UL
120 #define PSYCHO_STRBUF_FSYNC_B 0x4810UL
121 #define PSYCHO_STC_DATA_A 0xb000UL
122 #define PSYCHO_STC_DATA_B 0xc000UL
123 #define PSYCHO_STC_ERR_A 0xb400UL
124 #define PSYCHO_STC_ERR_B 0xc400UL
125 #define PSYCHO_STCERR_WRITE 0x0000000000000002UL /* Write Error */
126 #define PSYCHO_STCERR_READ 0x0000000000000001UL /* Read Error */
127 #define PSYCHO_STC_TAG_A 0xb800UL
128 #define PSYCHO_STC_TAG_B 0xc800UL
129 #define PSYCHO_STCTAG_PPN 0x0fffffff00000000UL /* Physical Page Number */
130 #define PSYCHO_STCTAG_VPN 0x00000000ffffe000UL /* Virtual Page Number */
131 #define PSYCHO_STCTAG_VALID 0x0000000000000002UL /* Valid */
132 #define PSYCHO_STCTAG_WRITE 0x0000000000000001UL /* Writable */
133 #define PSYCHO_STC_LINE_A 0xb900UL
134 #define PSYCHO_STC_LINE_B 0xc900UL
135 #define PSYCHO_STCLINE_LINDX 0x0000000001e00000UL /* LRU Index */
136 #define PSYCHO_STCLINE_SPTR 0x00000000001f8000UL /* Dirty Data Start Pointer */
137 #define PSYCHO_STCLINE_LADDR 0x0000000000007f00UL /* Line Address */
138 #define PSYCHO_STCLINE_EPTR 0x00000000000000fcUL /* Dirty Data End Pointer */
139 #define PSYCHO_STCLINE_VALID 0x0000000000000002UL /* Valid */
140 #define PSYCHO_STCLINE_FOFN 0x0000000000000001UL /* Fetch Outstanding / Flush Necessary */
142 static DEFINE_SPINLOCK(stc_buf_lock);
143 static unsigned long stc_error_buf[128];
144 static unsigned long stc_tag_buf[16];
145 static unsigned long stc_line_buf[16];
147 static void __psycho_check_one_stc(struct pci_pbm_info *pbm,
150 struct strbuf *strbuf = &pbm->stc;
151 unsigned long regbase = pbm->controller_regs;
152 unsigned long err_base, tag_base, line_base;
157 err_base = regbase + PSYCHO_STC_ERR_A;
158 tag_base = regbase + PSYCHO_STC_TAG_A;
159 line_base = regbase + PSYCHO_STC_LINE_A;
161 err_base = regbase + PSYCHO_STC_ERR_B;
162 tag_base = regbase + PSYCHO_STC_TAG_B;
163 line_base = regbase + PSYCHO_STC_LINE_B;
166 spin_lock(&stc_buf_lock);
168 /* This is __REALLY__ dangerous. When we put the
169 * streaming buffer into diagnostic mode to probe
170 * it's tags and error status, we _must_ clear all
171 * of the line tag valid bits before re-enabling
172 * the streaming buffer. If any dirty data lives
173 * in the STC when we do this, we will end up
174 * invalidating it before it has a chance to reach
177 control = psycho_read(strbuf->strbuf_control);
178 psycho_write(strbuf->strbuf_control,
179 (control | PSYCHO_STRBUF_CTRL_DENAB));
180 for (i = 0; i < 128; i++) {
183 val = psycho_read(err_base + (i * 8UL));
184 psycho_write(err_base + (i * 8UL), 0UL);
185 stc_error_buf[i] = val;
187 for (i = 0; i < 16; i++) {
188 stc_tag_buf[i] = psycho_read(tag_base + (i * 8UL));
189 stc_line_buf[i] = psycho_read(line_base + (i * 8UL));
190 psycho_write(tag_base + (i * 8UL), 0UL);
191 psycho_write(line_base + (i * 8UL), 0UL);
194 /* OK, state is logged, exit diagnostic mode. */
195 psycho_write(strbuf->strbuf_control, control);
197 for (i = 0; i < 16; i++) {
198 int j, saw_error, first, last;
203 for (j = first; j < last; j++) {
204 unsigned long errval = stc_error_buf[j];
207 printk("%s: STC_ERR(%d)[wr(%d)rd(%d)]\n",
210 (errval & PSYCHO_STCERR_WRITE) ? 1 : 0,
211 (errval & PSYCHO_STCERR_READ) ? 1 : 0);
214 if (saw_error != 0) {
215 unsigned long tagval = stc_tag_buf[i];
216 unsigned long lineval = stc_line_buf[i];
217 printk("%s: STC_TAG(%d)[PA(%016lx)VA(%08lx)V(%d)W(%d)]\n",
220 ((tagval & PSYCHO_STCTAG_PPN) >> 19UL),
221 (tagval & PSYCHO_STCTAG_VPN),
222 ((tagval & PSYCHO_STCTAG_VALID) ? 1 : 0),
223 ((tagval & PSYCHO_STCTAG_WRITE) ? 1 : 0));
224 printk("%s: STC_LINE(%d)[LIDX(%lx)SP(%lx)LADDR(%lx)EP(%lx)"
228 ((lineval & PSYCHO_STCLINE_LINDX) >> 21UL),
229 ((lineval & PSYCHO_STCLINE_SPTR) >> 15UL),
230 ((lineval & PSYCHO_STCLINE_LADDR) >> 8UL),
231 ((lineval & PSYCHO_STCLINE_EPTR) >> 2UL),
232 ((lineval & PSYCHO_STCLINE_VALID) ? 1 : 0),
233 ((lineval & PSYCHO_STCLINE_FOFN) ? 1 : 0));
237 spin_unlock(&stc_buf_lock);
240 static void __psycho_check_stc_error(struct pci_pbm_info *pbm,
243 enum psycho_error_type type)
245 __psycho_check_one_stc(pbm,
246 (pbm == &pbm->parent->pbm_A));
249 /* When an Uncorrectable Error or a PCI Error happens, we
250 * interrogate the IOMMU state to see if it is the cause.
252 #define PSYCHO_IOMMU_CONTROL 0x0200UL
253 #define PSYCHO_IOMMU_CTRL_RESV 0xfffffffff9000000UL /* Reserved */
254 #define PSYCHO_IOMMU_CTRL_XLTESTAT 0x0000000006000000UL /* Translation Error Status */
255 #define PSYCHO_IOMMU_CTRL_XLTEERR 0x0000000001000000UL /* Translation Error encountered */
256 #define PSYCHO_IOMMU_CTRL_LCKEN 0x0000000000800000UL /* Enable translation locking */
257 #define PSYCHO_IOMMU_CTRL_LCKPTR 0x0000000000780000UL /* Translation lock pointer */
258 #define PSYCHO_IOMMU_CTRL_TSBSZ 0x0000000000070000UL /* TSB Size */
259 #define PSYCHO_IOMMU_TSBSZ_1K 0x0000000000000000UL /* TSB Table 1024 8-byte entries */
260 #define PSYCHO_IOMMU_TSBSZ_2K 0x0000000000010000UL /* TSB Table 2048 8-byte entries */
261 #define PSYCHO_IOMMU_TSBSZ_4K 0x0000000000020000UL /* TSB Table 4096 8-byte entries */
262 #define PSYCHO_IOMMU_TSBSZ_8K 0x0000000000030000UL /* TSB Table 8192 8-byte entries */
263 #define PSYCHO_IOMMU_TSBSZ_16K 0x0000000000040000UL /* TSB Table 16k 8-byte entries */
264 #define PSYCHO_IOMMU_TSBSZ_32K 0x0000000000050000UL /* TSB Table 32k 8-byte entries */
265 #define PSYCHO_IOMMU_TSBSZ_64K 0x0000000000060000UL /* TSB Table 64k 8-byte entries */
266 #define PSYCHO_IOMMU_TSBSZ_128K 0x0000000000070000UL /* TSB Table 128k 8-byte entries */
267 #define PSYCHO_IOMMU_CTRL_RESV2 0x000000000000fff8UL /* Reserved */
268 #define PSYCHO_IOMMU_CTRL_TBWSZ 0x0000000000000004UL /* Assumed page size, 0=8k 1=64k */
269 #define PSYCHO_IOMMU_CTRL_DENAB 0x0000000000000002UL /* Diagnostic mode enable */
270 #define PSYCHO_IOMMU_CTRL_ENAB 0x0000000000000001UL /* IOMMU Enable */
271 #define PSYCHO_IOMMU_TSBBASE 0x0208UL
272 #define PSYCHO_IOMMU_FLUSH 0x0210UL
273 #define PSYCHO_IOMMU_TAG 0xa580UL
274 #define PSYCHO_IOMMU_TAG_ERRSTS (0x3UL << 23UL)
275 #define PSYCHO_IOMMU_TAG_ERR (0x1UL << 22UL)
276 #define PSYCHO_IOMMU_TAG_WRITE (0x1UL << 21UL)
277 #define PSYCHO_IOMMU_TAG_STREAM (0x1UL << 20UL)
278 #define PSYCHO_IOMMU_TAG_SIZE (0x1UL << 19UL)
279 #define PSYCHO_IOMMU_TAG_VPAGE 0x7ffffUL
280 #define PSYCHO_IOMMU_DATA 0xa600UL
281 #define PSYCHO_IOMMU_DATA_VALID (1UL << 30UL)
282 #define PSYCHO_IOMMU_DATA_CACHE (1UL << 28UL)
283 #define PSYCHO_IOMMU_DATA_PPAGE 0xfffffffUL
284 static void psycho_check_iommu_error(struct pci_pbm_info *pbm,
287 enum psycho_error_type type)
289 struct iommu *iommu = pbm->iommu;
290 unsigned long iommu_tag[16];
291 unsigned long iommu_data[16];
296 spin_lock_irqsave(&iommu->lock, flags);
297 control = psycho_read(iommu->iommu_control);
298 if (control & PSYCHO_IOMMU_CTRL_XLTEERR) {
301 /* Clear the error encountered bit. */
302 control &= ~PSYCHO_IOMMU_CTRL_XLTEERR;
303 psycho_write(iommu->iommu_control, control);
305 switch((control & PSYCHO_IOMMU_CTRL_XLTESTAT) >> 25UL) {
307 type_string = "Protection Error";
310 type_string = "Invalid Error";
313 type_string = "TimeOut Error";
317 type_string = "ECC Error";
320 printk("%s: IOMMU Error, type[%s]\n",
321 pbm->name, type_string);
323 /* Put the IOMMU into diagnostic mode and probe
324 * it's TLB for entries with error status.
326 * It is very possible for another DVMA to occur
327 * while we do this probe, and corrupt the system
328 * further. But we are so screwed at this point
329 * that we are likely to crash hard anyways, so
330 * get as much diagnostic information to the
333 psycho_write(iommu->iommu_control,
334 control | PSYCHO_IOMMU_CTRL_DENAB);
335 for (i = 0; i < 16; i++) {
336 unsigned long base = pbm->controller_regs;
339 psycho_read(base + PSYCHO_IOMMU_TAG + (i * 8UL));
341 psycho_read(base + PSYCHO_IOMMU_DATA + (i * 8UL));
343 /* Now clear out the entry. */
344 psycho_write(base + PSYCHO_IOMMU_TAG + (i * 8UL), 0);
345 psycho_write(base + PSYCHO_IOMMU_DATA + (i * 8UL), 0);
348 /* Leave diagnostic mode. */
349 psycho_write(iommu->iommu_control, control);
351 for (i = 0; i < 16; i++) {
352 unsigned long tag, data;
355 if (!(tag & PSYCHO_IOMMU_TAG_ERR))
358 data = iommu_data[i];
359 switch((tag & PSYCHO_IOMMU_TAG_ERRSTS) >> 23UL) {
361 type_string = "Protection Error";
364 type_string = "Invalid Error";
367 type_string = "TimeOut Error";
371 type_string = "ECC Error";
374 printk("%s: IOMMU TAG(%d)[error(%s) wr(%d) str(%d) sz(%dK) vpg(%08lx)]\n",
375 pbm->name, i, type_string,
376 ((tag & PSYCHO_IOMMU_TAG_WRITE) ? 1 : 0),
377 ((tag & PSYCHO_IOMMU_TAG_STREAM) ? 1 : 0),
378 ((tag & PSYCHO_IOMMU_TAG_SIZE) ? 64 : 8),
379 (tag & PSYCHO_IOMMU_TAG_VPAGE) << IOMMU_PAGE_SHIFT);
380 printk("%s: IOMMU DATA(%d)[valid(%d) cache(%d) ppg(%016lx)]\n",
382 ((data & PSYCHO_IOMMU_DATA_VALID) ? 1 : 0),
383 ((data & PSYCHO_IOMMU_DATA_CACHE) ? 1 : 0),
384 (data & PSYCHO_IOMMU_DATA_PPAGE) << IOMMU_PAGE_SHIFT);
387 __psycho_check_stc_error(pbm, afsr, afar, type);
388 spin_unlock_irqrestore(&iommu->lock, flags);
391 /* Uncorrectable Errors. Cause of the error and the address are
392 * recorded in the UE_AFSR and UE_AFAR of PSYCHO. They are errors
393 * relating to UPA interface transactions.
395 #define PSYCHO_UE_AFSR 0x0030UL
396 #define PSYCHO_UEAFSR_PPIO 0x8000000000000000UL /* Primary PIO is cause */
397 #define PSYCHO_UEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read is cause */
398 #define PSYCHO_UEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write is cause */
399 #define PSYCHO_UEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
400 #define PSYCHO_UEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read is cause */
401 #define PSYCHO_UEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write is cause*/
402 #define PSYCHO_UEAFSR_RESV1 0x03ff000000000000UL /* Reserved */
403 #define PSYCHO_UEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask of failed transfer */
404 #define PSYCHO_UEAFSR_DOFF 0x00000000e0000000UL /* Doubleword Offset */
405 #define PSYCHO_UEAFSR_MID 0x000000001f000000UL /* UPA MID causing the fault */
406 #define PSYCHO_UEAFSR_BLK 0x0000000000800000UL /* Trans was block operation */
407 #define PSYCHO_UEAFSR_RESV2 0x00000000007fffffUL /* Reserved */
408 #define PSYCHO_UE_AFAR 0x0038UL
410 static irqreturn_t psycho_ue_intr(int irq, void *dev_id)
412 struct pci_pbm_info *pbm = dev_id;
413 struct pci_controller_info *p = pbm->parent;
414 unsigned long afsr_reg = pbm->controller_regs + PSYCHO_UE_AFSR;
415 unsigned long afar_reg = pbm->controller_regs + PSYCHO_UE_AFAR;
416 unsigned long afsr, afar, error_bits;
419 /* Latch uncorrectable error status. */
420 afar = psycho_read(afar_reg);
421 afsr = psycho_read(afsr_reg);
423 /* Clear the primary/secondary error status bits. */
425 (PSYCHO_UEAFSR_PPIO | PSYCHO_UEAFSR_PDRD | PSYCHO_UEAFSR_PDWR |
426 PSYCHO_UEAFSR_SPIO | PSYCHO_UEAFSR_SDRD | PSYCHO_UEAFSR_SDWR);
429 psycho_write(afsr_reg, error_bits);
432 printk("%s: Uncorrectable Error, primary error type[%s]\n",
434 (((error_bits & PSYCHO_UEAFSR_PPIO) ?
436 ((error_bits & PSYCHO_UEAFSR_PDRD) ?
438 ((error_bits & PSYCHO_UEAFSR_PDWR) ?
439 "DMA Write" : "???")))));
440 printk("%s: bytemask[%04lx] dword_offset[%lx] UPA_MID[%02lx] was_block(%d)\n",
442 (afsr & PSYCHO_UEAFSR_BMSK) >> 32UL,
443 (afsr & PSYCHO_UEAFSR_DOFF) >> 29UL,
444 (afsr & PSYCHO_UEAFSR_MID) >> 24UL,
445 ((afsr & PSYCHO_UEAFSR_BLK) ? 1 : 0));
446 printk("%s: UE AFAR [%016lx]\n", pbm->name, afar);
447 printk("%s: UE Secondary errors [", pbm->name);
449 if (afsr & PSYCHO_UEAFSR_SPIO) {
453 if (afsr & PSYCHO_UEAFSR_SDRD) {
455 printk("(DMA Read)");
457 if (afsr & PSYCHO_UEAFSR_SDWR) {
459 printk("(DMA Write)");
465 /* Interrogate both IOMMUs for error status. */
466 psycho_check_iommu_error(&p->pbm_A, afsr, afar, UE_ERR);
467 psycho_check_iommu_error(&p->pbm_B, afsr, afar, UE_ERR);
472 /* Correctable Errors. */
473 #define PSYCHO_CE_AFSR 0x0040UL
474 #define PSYCHO_CEAFSR_PPIO 0x8000000000000000UL /* Primary PIO is cause */
475 #define PSYCHO_CEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read is cause */
476 #define PSYCHO_CEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write is cause */
477 #define PSYCHO_CEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
478 #define PSYCHO_CEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read is cause */
479 #define PSYCHO_CEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write is cause*/
480 #define PSYCHO_CEAFSR_RESV1 0x0300000000000000UL /* Reserved */
481 #define PSYCHO_CEAFSR_ESYND 0x00ff000000000000UL /* Syndrome Bits */
482 #define PSYCHO_CEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask of failed transfer */
483 #define PSYCHO_CEAFSR_DOFF 0x00000000e0000000UL /* Double Offset */
484 #define PSYCHO_CEAFSR_MID 0x000000001f000000UL /* UPA MID causing the fault */
485 #define PSYCHO_CEAFSR_BLK 0x0000000000800000UL /* Trans was block operation */
486 #define PSYCHO_CEAFSR_RESV2 0x00000000007fffffUL /* Reserved */
487 #define PSYCHO_CE_AFAR 0x0040UL
489 static irqreturn_t psycho_ce_intr(int irq, void *dev_id)
491 struct pci_pbm_info *pbm = dev_id;
492 unsigned long afsr_reg = pbm->controller_regs + PSYCHO_CE_AFSR;
493 unsigned long afar_reg = pbm->controller_regs + PSYCHO_CE_AFAR;
494 unsigned long afsr, afar, error_bits;
497 /* Latch error status. */
498 afar = psycho_read(afar_reg);
499 afsr = psycho_read(afsr_reg);
501 /* Clear primary/secondary error status bits. */
503 (PSYCHO_CEAFSR_PPIO | PSYCHO_CEAFSR_PDRD | PSYCHO_CEAFSR_PDWR |
504 PSYCHO_CEAFSR_SPIO | PSYCHO_CEAFSR_SDRD | PSYCHO_CEAFSR_SDWR);
507 psycho_write(afsr_reg, error_bits);
510 printk("%s: Correctable Error, primary error type[%s]\n",
512 (((error_bits & PSYCHO_CEAFSR_PPIO) ?
514 ((error_bits & PSYCHO_CEAFSR_PDRD) ?
516 ((error_bits & PSYCHO_CEAFSR_PDWR) ?
517 "DMA Write" : "???")))));
519 /* XXX Use syndrome and afar to print out module string just like
520 * XXX UDB CE trap handler does... -DaveM
522 printk("%s: syndrome[%02lx] bytemask[%04lx] dword_offset[%lx] "
523 "UPA_MID[%02lx] was_block(%d)\n",
525 (afsr & PSYCHO_CEAFSR_ESYND) >> 48UL,
526 (afsr & PSYCHO_CEAFSR_BMSK) >> 32UL,
527 (afsr & PSYCHO_CEAFSR_DOFF) >> 29UL,
528 (afsr & PSYCHO_CEAFSR_MID) >> 24UL,
529 ((afsr & PSYCHO_CEAFSR_BLK) ? 1 : 0));
530 printk("%s: CE AFAR [%016lx]\n", pbm->name, afar);
531 printk("%s: CE Secondary errors [", pbm->name);
533 if (afsr & PSYCHO_CEAFSR_SPIO) {
537 if (afsr & PSYCHO_CEAFSR_SDRD) {
539 printk("(DMA Read)");
541 if (afsr & PSYCHO_CEAFSR_SDWR) {
543 printk("(DMA Write)");
552 /* PCI Errors. They are signalled by the PCI bus module since they
553 * are associated with a specific bus segment.
555 #define PSYCHO_PCI_AFSR_A 0x2010UL
556 #define PSYCHO_PCI_AFSR_B 0x4010UL
557 #define PSYCHO_PCIAFSR_PMA 0x8000000000000000UL /* Primary Master Abort Error */
558 #define PSYCHO_PCIAFSR_PTA 0x4000000000000000UL /* Primary Target Abort Error */
559 #define PSYCHO_PCIAFSR_PRTRY 0x2000000000000000UL /* Primary Excessive Retries */
560 #define PSYCHO_PCIAFSR_PPERR 0x1000000000000000UL /* Primary Parity Error */
561 #define PSYCHO_PCIAFSR_SMA 0x0800000000000000UL /* Secondary Master Abort Error */
562 #define PSYCHO_PCIAFSR_STA 0x0400000000000000UL /* Secondary Target Abort Error */
563 #define PSYCHO_PCIAFSR_SRTRY 0x0200000000000000UL /* Secondary Excessive Retries */
564 #define PSYCHO_PCIAFSR_SPERR 0x0100000000000000UL /* Secondary Parity Error */
565 #define PSYCHO_PCIAFSR_RESV1 0x00ff000000000000UL /* Reserved */
566 #define PSYCHO_PCIAFSR_BMSK 0x0000ffff00000000UL /* Bytemask of failed transfer */
567 #define PSYCHO_PCIAFSR_BLK 0x0000000080000000UL /* Trans was block operation */
568 #define PSYCHO_PCIAFSR_RESV2 0x0000000040000000UL /* Reserved */
569 #define PSYCHO_PCIAFSR_MID 0x000000003e000000UL /* MID causing the error */
570 #define PSYCHO_PCIAFSR_RESV3 0x0000000001ffffffUL /* Reserved */
571 #define PSYCHO_PCI_AFAR_A 0x2018UL
572 #define PSYCHO_PCI_AFAR_B 0x4018UL
574 static irqreturn_t psycho_pcierr_intr_other(struct pci_pbm_info *pbm, int is_pbm_a)
576 unsigned long csr_reg, csr, csr_error_bits;
577 irqreturn_t ret = IRQ_NONE;
581 csr_reg = pbm->controller_regs + PSYCHO_PCIA_CTRL;
583 csr_reg = pbm->controller_regs + PSYCHO_PCIB_CTRL;
585 csr = psycho_read(csr_reg);
587 csr & (PSYCHO_PCICTRL_SBH_ERR | PSYCHO_PCICTRL_SERR);
588 if (csr_error_bits) {
589 /* Clear the errors. */
590 psycho_write(csr_reg, csr);
593 if (csr_error_bits & PSYCHO_PCICTRL_SBH_ERR)
594 printk("%s: PCI streaming byte hole error asserted.\n",
596 if (csr_error_bits & PSYCHO_PCICTRL_SERR)
597 printk("%s: PCI SERR signal asserted.\n", pbm->name);
600 pci_read_config_word(pbm->pci_bus->self, PCI_STATUS, &stat);
601 if (stat & (PCI_STATUS_PARITY |
602 PCI_STATUS_SIG_TARGET_ABORT |
603 PCI_STATUS_REC_TARGET_ABORT |
604 PCI_STATUS_REC_MASTER_ABORT |
605 PCI_STATUS_SIG_SYSTEM_ERROR)) {
606 printk("%s: PCI bus error, PCI_STATUS[%04x]\n",
608 pci_write_config_word(pbm->pci_bus->self, PCI_STATUS, 0xffff);
614 static irqreturn_t psycho_pcierr_intr(int irq, void *dev_id)
616 struct pci_pbm_info *pbm = dev_id;
617 struct pci_controller_info *p = pbm->parent;
618 unsigned long afsr_reg, afar_reg;
619 unsigned long afsr, afar, error_bits;
620 int is_pbm_a, reported;
622 is_pbm_a = (pbm == &pbm->parent->pbm_A);
624 afsr_reg = p->pbm_A.controller_regs + PSYCHO_PCI_AFSR_A;
625 afar_reg = p->pbm_A.controller_regs + PSYCHO_PCI_AFAR_A;
627 afsr_reg = p->pbm_A.controller_regs + PSYCHO_PCI_AFSR_B;
628 afar_reg = p->pbm_A.controller_regs + PSYCHO_PCI_AFAR_B;
631 /* Latch error status. */
632 afar = psycho_read(afar_reg);
633 afsr = psycho_read(afsr_reg);
635 /* Clear primary/secondary error status bits. */
637 (PSYCHO_PCIAFSR_PMA | PSYCHO_PCIAFSR_PTA |
638 PSYCHO_PCIAFSR_PRTRY | PSYCHO_PCIAFSR_PPERR |
639 PSYCHO_PCIAFSR_SMA | PSYCHO_PCIAFSR_STA |
640 PSYCHO_PCIAFSR_SRTRY | PSYCHO_PCIAFSR_SPERR);
642 return psycho_pcierr_intr_other(pbm, is_pbm_a);
643 psycho_write(afsr_reg, error_bits);
646 printk("%s: PCI Error, primary error type[%s]\n",
648 (((error_bits & PSYCHO_PCIAFSR_PMA) ?
650 ((error_bits & PSYCHO_PCIAFSR_PTA) ?
652 ((error_bits & PSYCHO_PCIAFSR_PRTRY) ?
653 "Excessive Retries" :
654 ((error_bits & PSYCHO_PCIAFSR_PPERR) ?
655 "Parity Error" : "???"))))));
656 printk("%s: bytemask[%04lx] UPA_MID[%02lx] was_block(%d)\n",
658 (afsr & PSYCHO_PCIAFSR_BMSK) >> 32UL,
659 (afsr & PSYCHO_PCIAFSR_MID) >> 25UL,
660 (afsr & PSYCHO_PCIAFSR_BLK) ? 1 : 0);
661 printk("%s: PCI AFAR [%016lx]\n", pbm->name, afar);
662 printk("%s: PCI Secondary errors [", pbm->name);
664 if (afsr & PSYCHO_PCIAFSR_SMA) {
666 printk("(Master Abort)");
668 if (afsr & PSYCHO_PCIAFSR_STA) {
670 printk("(Target Abort)");
672 if (afsr & PSYCHO_PCIAFSR_SRTRY) {
674 printk("(Excessive Retries)");
676 if (afsr & PSYCHO_PCIAFSR_SPERR) {
678 printk("(Parity Error)");
684 /* For the error types shown, scan PBM's PCI bus for devices
685 * which have logged that error type.
688 /* If we see a Target Abort, this could be the result of an
689 * IOMMU translation error of some sort. It is extremely
690 * useful to log this information as usually it indicates
691 * a bug in the IOMMU support code or a PCI device driver.
693 if (error_bits & (PSYCHO_PCIAFSR_PTA | PSYCHO_PCIAFSR_STA)) {
694 psycho_check_iommu_error(pbm, afsr, afar, PCI_ERR);
695 pci_scan_for_target_abort(pbm, pbm->pci_bus);
697 if (error_bits & (PSYCHO_PCIAFSR_PMA | PSYCHO_PCIAFSR_SMA))
698 pci_scan_for_master_abort(pbm, pbm->pci_bus);
700 /* For excessive retries, PSYCHO/PBM will abort the device
701 * and there is no way to specifically check for excessive
702 * retries in the config space status registers. So what
703 * we hope is that we'll catch it via the master/target
707 if (error_bits & (PSYCHO_PCIAFSR_PPERR | PSYCHO_PCIAFSR_SPERR))
708 pci_scan_for_parity_error(pbm, pbm->pci_bus);
713 /* XXX What about PowerFail/PowerManagement??? -DaveM */
714 #define PSYCHO_ECC_CTRL 0x0020
715 #define PSYCHO_ECCCTRL_EE 0x8000000000000000UL /* Enable ECC Checking */
716 #define PSYCHO_ECCCTRL_UE 0x4000000000000000UL /* Enable UE Interrupts */
717 #define PSYCHO_ECCCTRL_CE 0x2000000000000000UL /* Enable CE INterrupts */
718 static void psycho_register_error_handlers(struct pci_pbm_info *pbm)
720 struct of_device *op = of_find_device_by_node(pbm->prom_node);
721 unsigned long base = pbm->controller_regs;
728 /* Psycho interrupt property order is:
729 * 0: PCIERR INO for this PBM
734 * 5: POWER MANAGEMENT
737 if (op->num_irqs < 6)
740 /* We really mean to ignore the return result here. Two
741 * PCI controller share the same interrupt numbers and
742 * drive the same front-end hardware. Whichever of the
743 * two get in here first will register the IRQ handler
744 * the second will just error out since we do not pass in
747 err = request_irq(op->irqs[1], psycho_ue_intr, IRQF_SHARED,
749 err = request_irq(op->irqs[2], psycho_ce_intr, IRQF_SHARED,
752 /* This one, however, ought not to fail. We can just warn
753 * about it since the system can still operate properly even
756 err = request_irq(op->irqs[0], psycho_pcierr_intr, IRQF_SHARED,
757 "PSYCHO_PCIERR", pbm);
759 printk(KERN_WARNING "%s: Could not register PCIERR, "
760 "err=%d\n", pbm->name, err);
762 /* Enable UE and CE interrupts for controller. */
763 psycho_write(base + PSYCHO_ECC_CTRL,
768 /* Enable PCI Error interrupts and clear error
771 tmp = psycho_read(base + PSYCHO_PCIA_CTRL);
772 tmp |= (PSYCHO_PCICTRL_SERR |
773 PSYCHO_PCICTRL_SBH_ERR |
775 tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
776 psycho_write(base + PSYCHO_PCIA_CTRL, tmp);
778 tmp = psycho_read(base + PSYCHO_PCIB_CTRL);
779 tmp |= (PSYCHO_PCICTRL_SERR |
780 PSYCHO_PCICTRL_SBH_ERR |
782 tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
783 psycho_write(base + PSYCHO_PCIB_CTRL, tmp);
786 /* PSYCHO boot time probing and initialization. */
787 static void pbm_config_busmastering(struct pci_pbm_info *pbm)
791 /* Set cache-line size to 64 bytes, this is actually
792 * a nop but I do it for completeness.
794 addr = psycho_pci_config_mkaddr(pbm, pbm->pci_first_busno,
795 0, PCI_CACHE_LINE_SIZE);
796 pci_config_write8(addr, 64 / sizeof(u32));
798 /* Set PBM latency timer to 64 PCI clocks. */
799 addr = psycho_pci_config_mkaddr(pbm, pbm->pci_first_busno,
800 0, PCI_LATENCY_TIMER);
801 pci_config_write8(addr, 64);
804 static void __init psycho_scan_bus(struct pci_pbm_info *pbm)
806 pbm_config_busmastering(pbm);
807 pbm->is_66mhz_capable = 0;
808 pbm->pci_bus = pci_scan_one_pbm(pbm);
810 /* After the PCI bus scan is complete, we can register
811 * the error interrupt handlers.
813 psycho_register_error_handlers(pbm);
816 static int psycho_iommu_init(struct pci_pbm_info *pbm)
818 struct iommu *iommu = pbm->iommu;
823 /* Register addresses. */
824 iommu->iommu_control = pbm->controller_regs + PSYCHO_IOMMU_CONTROL;
825 iommu->iommu_tsbbase = pbm->controller_regs + PSYCHO_IOMMU_TSBBASE;
826 iommu->iommu_flush = pbm->controller_regs + PSYCHO_IOMMU_FLUSH;
827 iommu->iommu_tags = iommu->iommu_flush + (0xa580UL - 0x0210UL);
829 /* PSYCHO's IOMMU lacks ctx flushing. */
830 iommu->iommu_ctxflush = 0;
832 /* We use the main control register of PSYCHO as the write
833 * completion register.
835 iommu->write_complete_reg = pbm->controller_regs + PSYCHO_CONTROL;
838 * Invalidate TLB Entries.
840 control = psycho_read(pbm->controller_regs + PSYCHO_IOMMU_CONTROL);
841 control |= PSYCHO_IOMMU_CTRL_DENAB;
842 psycho_write(pbm->controller_regs + PSYCHO_IOMMU_CONTROL, control);
843 for(i = 0; i < 16; i++) {
844 psycho_write(pbm->controller_regs + PSYCHO_IOMMU_TAG + (i * 8UL), 0);
845 psycho_write(pbm->controller_regs + PSYCHO_IOMMU_DATA + (i * 8UL), 0);
848 /* Leave diag mode enabled for full-flushing done
851 err = iommu_table_init(iommu, IO_TSB_SIZE, 0xc0000000, 0xffffffff,
856 psycho_write(pbm->controller_regs + PSYCHO_IOMMU_TSBBASE,
857 __pa(iommu->page_table));
859 control = psycho_read(pbm->controller_regs + PSYCHO_IOMMU_CONTROL);
860 control &= ~(PSYCHO_IOMMU_CTRL_TSBSZ | PSYCHO_IOMMU_CTRL_TBWSZ);
861 control |= (PSYCHO_IOMMU_TSBSZ_128K | PSYCHO_IOMMU_CTRL_ENAB);
862 psycho_write(pbm->controller_regs + PSYCHO_IOMMU_CONTROL, control);
864 /* If necessary, hook us up for starfire IRQ translations. */
865 if (this_is_starfire)
866 starfire_hookup(pbm->portid);
871 #define PSYCHO_IRQ_RETRY 0x1a00UL
872 #define PSYCHO_PCIA_DIAG 0x2020UL
873 #define PSYCHO_PCIB_DIAG 0x4020UL
874 #define PSYCHO_PCIDIAG_RESV 0xffffffffffffff80UL /* Reserved */
875 #define PSYCHO_PCIDIAG_DRETRY 0x0000000000000040UL /* Disable retry limit */
876 #define PSYCHO_PCIDIAG_DISYNC 0x0000000000000020UL /* Disable DMA wr / irq sync */
877 #define PSYCHO_PCIDIAG_DDWSYNC 0x0000000000000010UL /* Disable DMA wr / PIO rd sync */
878 #define PSYCHO_PCIDIAG_IDDPAR 0x0000000000000008UL /* Invert DMA data parity */
879 #define PSYCHO_PCIDIAG_IPDPAR 0x0000000000000004UL /* Invert PIO data parity */
880 #define PSYCHO_PCIDIAG_IPAPAR 0x0000000000000002UL /* Invert PIO address parity */
881 #define PSYCHO_PCIDIAG_LPBACK 0x0000000000000001UL /* Enable loopback mode */
883 static void psycho_controller_hwinit(struct pci_pbm_info *pbm)
887 psycho_write(pbm->controller_regs + PSYCHO_IRQ_RETRY, 5);
889 /* Enable arbiter for all PCI slots. */
890 tmp = psycho_read(pbm->controller_regs + PSYCHO_PCIA_CTRL);
891 tmp |= PSYCHO_PCICTRL_AEN;
892 psycho_write(pbm->controller_regs + PSYCHO_PCIA_CTRL, tmp);
894 tmp = psycho_read(pbm->controller_regs + PSYCHO_PCIB_CTRL);
895 tmp |= PSYCHO_PCICTRL_AEN;
896 psycho_write(pbm->controller_regs + PSYCHO_PCIB_CTRL, tmp);
898 /* Disable DMA write / PIO read synchronization on
899 * both PCI bus segments.
900 * [ U2P Erratum 1243770, STP2223BGA data sheet ]
902 tmp = psycho_read(pbm->controller_regs + PSYCHO_PCIA_DIAG);
903 tmp |= PSYCHO_PCIDIAG_DDWSYNC;
904 psycho_write(pbm->controller_regs + PSYCHO_PCIA_DIAG, tmp);
906 tmp = psycho_read(pbm->controller_regs + PSYCHO_PCIB_DIAG);
907 tmp |= PSYCHO_PCIDIAG_DDWSYNC;
908 psycho_write(pbm->controller_regs + PSYCHO_PCIB_DIAG, tmp);
911 static void psycho_pbm_strbuf_init(struct pci_pbm_info *pbm,
914 unsigned long base = pbm->controller_regs;
918 pbm->stc.strbuf_control = base + PSYCHO_STRBUF_CONTROL_A;
919 pbm->stc.strbuf_pflush = base + PSYCHO_STRBUF_FLUSH_A;
920 pbm->stc.strbuf_fsync = base + PSYCHO_STRBUF_FSYNC_A;
922 pbm->stc.strbuf_control = base + PSYCHO_STRBUF_CONTROL_B;
923 pbm->stc.strbuf_pflush = base + PSYCHO_STRBUF_FLUSH_B;
924 pbm->stc.strbuf_fsync = base + PSYCHO_STRBUF_FSYNC_B;
926 /* PSYCHO's streaming buffer lacks ctx flushing. */
927 pbm->stc.strbuf_ctxflush = 0;
928 pbm->stc.strbuf_ctxmatch_base = 0;
930 pbm->stc.strbuf_flushflag = (volatile unsigned long *)
931 ((((unsigned long)&pbm->stc.__flushflag_buf[0])
934 pbm->stc.strbuf_flushflag_pa = (unsigned long)
935 __pa(pbm->stc.strbuf_flushflag);
937 /* Enable the streaming buffer. We have to be careful
938 * just in case OBP left it with LRU locking enabled.
940 * It is possible to control if PBM will be rerun on
941 * line misses. Currently I just retain whatever setting
942 * OBP left us with. All checks so far show it having
945 #undef PSYCHO_STRBUF_RERUN_ENABLE
946 #undef PSYCHO_STRBUF_RERUN_DISABLE
947 control = psycho_read(pbm->stc.strbuf_control);
948 control |= PSYCHO_STRBUF_CTRL_ENAB;
949 control &= ~(PSYCHO_STRBUF_CTRL_LENAB | PSYCHO_STRBUF_CTRL_LPTR);
950 #ifdef PSYCHO_STRBUF_RERUN_ENABLE
951 control &= ~(PSYCHO_STRBUF_CTRL_RRDIS);
953 #ifdef PSYCHO_STRBUF_RERUN_DISABLE
954 control |= PSYCHO_STRBUF_CTRL_RRDIS;
957 psycho_write(pbm->stc.strbuf_control, control);
959 pbm->stc.strbuf_enabled = 1;
962 #define PSYCHO_IOSPACE_A 0x002000000UL
963 #define PSYCHO_IOSPACE_B 0x002010000UL
964 #define PSYCHO_IOSPACE_SIZE 0x00000ffffUL
965 #define PSYCHO_MEMSPACE_A 0x100000000UL
966 #define PSYCHO_MEMSPACE_B 0x180000000UL
967 #define PSYCHO_MEMSPACE_SIZE 0x07fffffffUL
969 static void __init psycho_pbm_init(struct pci_controller_info *p,
970 struct device_node *dp, int is_pbm_a)
972 struct property *prop;
973 struct pci_pbm_info *pbm;
980 pbm->next = pci_pbm_root;
985 pbm->scan_bus = psycho_scan_bus;
986 pbm->pci_ops = &sun4u_pci_ops;
987 pbm->config_space_reg_bits = 8;
989 pbm->index = pci_num_pbms++;
991 pbm->chip_type = PBM_CHIP_TYPE_PSYCHO;
992 pbm->chip_version = 0;
993 prop = of_find_property(dp, "version#", NULL);
995 pbm->chip_version = *(int *) prop->value;
996 pbm->chip_revision = 0;
997 prop = of_find_property(dp, "module-revision#", NULL);
999 pbm->chip_revision = *(int *) prop->value;
1002 pbm->prom_node = dp;
1003 pbm->name = dp->full_name;
1005 printk("%s: PSYCHO PCI Bus Module ver[%x:%x]\n",
1007 pbm->chip_version, pbm->chip_revision);
1009 pci_determine_mem_io_space(pbm);
1011 pci_get_pbm_props(pbm);
1013 psycho_pbm_strbuf_init(pbm, is_pbm_a);
1016 #define PSYCHO_CONFIGSPACE 0x001000000UL
1018 void __init psycho_init(struct device_node *dp, char *model_name)
1020 struct linux_prom64_registers *pr_regs;
1021 struct pci_controller_info *p;
1022 struct pci_pbm_info *pbm;
1023 struct iommu *iommu;
1024 struct property *prop;
1029 prop = of_find_property(dp, "upa-portid", NULL);
1031 upa_portid = *(u32 *) prop->value;
1033 for (pbm = pci_pbm_root; pbm; pbm = pbm->next) {
1034 struct pci_controller_info *p = pbm->parent;
1036 if (p->pbm_A.portid == upa_portid) {
1037 is_pbm_a = (p->pbm_A.prom_node == NULL);
1038 psycho_pbm_init(p, dp, is_pbm_a);
1043 p = kzalloc(sizeof(struct pci_controller_info), GFP_ATOMIC);
1045 goto fatal_memory_error;
1046 iommu = kzalloc(sizeof(struct iommu), GFP_ATOMIC);
1048 goto fatal_memory_error;
1050 p->pbm_A.iommu = p->pbm_B.iommu = iommu;
1052 p->pbm_A.portid = upa_portid;
1053 p->pbm_B.portid = upa_portid;
1055 prop = of_find_property(dp, "reg", NULL);
1056 pr_regs = prop->value;
1058 p->pbm_A.controller_regs = pr_regs[2].phys_addr;
1059 p->pbm_B.controller_regs = pr_regs[2].phys_addr;
1061 p->pbm_A.config_space = p->pbm_B.config_space =
1062 (pr_regs[2].phys_addr + PSYCHO_CONFIGSPACE);
1064 psycho_controller_hwinit(&p->pbm_A);
1066 if (psycho_iommu_init(&p->pbm_A))
1067 goto fatal_memory_error;
1069 is_pbm_a = ((pr_regs[0].phys_addr & 0x6000) == 0x2000);
1070 psycho_pbm_init(p, dp, is_pbm_a);
1074 prom_printf("PSYCHO: Fatal memory allocation error.\n");