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Merge tag 'char-misc-4.15-rc1' of ssh://gitolite.kernel.org/pub/scm/linux/kernel...
[mirror_ubuntu-bionic-kernel.git] / arch / sparc / kernel / pci_psycho.c
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b2441318 1// SPDX-License-Identifier: GPL-2.0
9fd8b647 2/* pci_psycho.c: PSYCHO/U2P specific PCI controller support.
1da177e4 3 *
9fd8b647 4 * Copyright (C) 1997, 1998, 1999, 2007 David S. Miller (davem@davemloft.net)
1da177e4
LT		 5 * Copyright (C) 1998, 1999 Eddie C. Dost (ecd@skynet.be)
6 * Copyright (C) 1999 Jakub Jelinek (jakub@redhat.com)
7 */
8
9#include <linux/kernel.h>
10#include <linux/types.h>
11#include <linux/pci.h>
12#include <linux/init.h>
7b64db60 13#include <linux/export.h>
1da177e4
LT		 14#include <linux/slab.h>
15#include <linux/interrupt.h>
764f2579 16#include <linux/of_device.h>
1da177e4 17
1da177e4
LT		 18#include <asm/iommu.h>
19#include <asm/irq.h>
20#include <asm/starfire.h>
e87dc350 21#include <asm/prom.h>
87395fc6 22#include <asm/upa.h>
1da177e4
LT		 23
24#include "pci_impl.h"
25#include "iommu_common.h"
a21cff3e 26#include "psycho_common.h"
1da177e4 27
b20bfe41
DM		 28#define DRIVER_NAME "psycho"
29#define PFX DRIVER_NAME ": "
30
1da177e4
LT		 31/* Misc. PSYCHO PCI controller register offsets and definitions. */
32#define PSYCHO_CONTROL 0x0010UL
33#define PSYCHO_CONTROL_IMPL 0xf000000000000000UL /* Implementation of this PSYCHO*/
34#define PSYCHO_CONTROL_VER 0x0f00000000000000UL /* Version of this PSYCHO */
35#define PSYCHO_CONTROL_MID 0x00f8000000000000UL /* UPA Module ID of PSYCHO */
36#define PSYCHO_CONTROL_IGN 0x0007c00000000000UL /* Interrupt Group Number */
37#define PSYCHO_CONTROL_RESV 0x00003ffffffffff0UL /* Reserved */
38#define PSYCHO_CONTROL_APCKEN 0x0000000000000008UL /* Address Parity Check Enable */
39#define PSYCHO_CONTROL_APERR 0x0000000000000004UL /* Incoming System Addr Parerr */
40#define PSYCHO_CONTROL_IAP 0x0000000000000002UL /* Invert UPA Parity */
41#define PSYCHO_CONTROL_MODE 0x0000000000000001UL /* PSYCHO clock mode */
42#define PSYCHO_PCIA_CTRL 0x2000UL
43#define PSYCHO_PCIB_CTRL 0x4000UL
44#define PSYCHO_PCICTRL_RESV1 0xfffffff000000000UL /* Reserved */
45#define PSYCHO_PCICTRL_SBH_ERR 0x0000000800000000UL /* Streaming byte hole error */
46#define PSYCHO_PCICTRL_SERR 0x0000000400000000UL /* SERR signal asserted */
47#define PSYCHO_PCICTRL_SPEED 0x0000000200000000UL /* PCI speed (1 is U2P clock) */
48#define PSYCHO_PCICTRL_RESV2 0x00000001ffc00000UL /* Reserved */
49#define PSYCHO_PCICTRL_ARB_PARK 0x0000000000200000UL /* PCI arbitration parking */
50#define PSYCHO_PCICTRL_RESV3 0x00000000001ff800UL /* Reserved */
51#define PSYCHO_PCICTRL_SBH_INT 0x0000000000000400UL /* Streaming byte hole int enab */
52#define PSYCHO_PCICTRL_WEN 0x0000000000000200UL /* Power Mgmt Wake Enable */
53#define PSYCHO_PCICTRL_EEN 0x0000000000000100UL /* PCI Error Interrupt Enable */
54#define PSYCHO_PCICTRL_RESV4 0x00000000000000c0UL /* Reserved */
55#define PSYCHO_PCICTRL_AEN 0x000000000000003fUL /* PCI DVMA Arbitration Enable */
56
1da177e4 57/* PSYCHO error handling support. */
1da177e4
LT		 58
59/* Helper function of IOMMU error checking, which checks out
60 * the state of the streaming buffers. The IOMMU lock is
61 * held when this is called.
62 *
63 * For the PCI error case we know which PBM (and thus which
64 * streaming buffer) caused the error, but for the uncorrectable
65 * error case we do not. So we always check both streaming caches.
66 */
67#define PSYCHO_STRBUF_CONTROL_A 0x2800UL
68#define PSYCHO_STRBUF_CONTROL_B 0x4800UL
69#define PSYCHO_STRBUF_CTRL_LPTR 0x00000000000000f0UL /* LRU Lock Pointer */
70#define PSYCHO_STRBUF_CTRL_LENAB 0x0000000000000008UL /* LRU Lock Enable */
71#define PSYCHO_STRBUF_CTRL_RRDIS 0x0000000000000004UL /* Rerun Disable */
72#define PSYCHO_STRBUF_CTRL_DENAB 0x0000000000000002UL /* Diagnostic Mode Enable */
73#define PSYCHO_STRBUF_CTRL_ENAB 0x0000000000000001UL /* Streaming Buffer Enable */
74#define PSYCHO_STRBUF_FLUSH_A 0x2808UL
75#define PSYCHO_STRBUF_FLUSH_B 0x4808UL
76#define PSYCHO_STRBUF_FSYNC_A 0x2810UL
77#define PSYCHO_STRBUF_FSYNC_B 0x4810UL
78#define PSYCHO_STC_DATA_A 0xb000UL
79#define PSYCHO_STC_DATA_B 0xc000UL
80#define PSYCHO_STC_ERR_A 0xb400UL
81#define PSYCHO_STC_ERR_B 0xc400UL
1da177e4
LT		 82#define PSYCHO_STC_TAG_A 0xb800UL
83#define PSYCHO_STC_TAG_B 0xc800UL
1da177e4
LT		 84#define PSYCHO_STC_LINE_A 0xb900UL
85#define PSYCHO_STC_LINE_B 0xc900UL
1da177e4 86
1da177e4
LT		 87/* When an Uncorrectable Error or a PCI Error happens, we
88 * interrogate the IOMMU state to see if it is the cause.
89 */
90#define PSYCHO_IOMMU_CONTROL 0x0200UL
91#define PSYCHO_IOMMU_CTRL_RESV 0xfffffffff9000000UL /* Reserved */
92#define PSYCHO_IOMMU_CTRL_XLTESTAT 0x0000000006000000UL /* Translation Error Status */
93#define PSYCHO_IOMMU_CTRL_XLTEERR 0x0000000001000000UL /* Translation Error encountered */
94#define PSYCHO_IOMMU_CTRL_LCKEN 0x0000000000800000UL /* Enable translation locking */
95#define PSYCHO_IOMMU_CTRL_LCKPTR 0x0000000000780000UL /* Translation lock pointer */
96#define PSYCHO_IOMMU_CTRL_TSBSZ 0x0000000000070000UL /* TSB Size */
97#define PSYCHO_IOMMU_TSBSZ_1K 0x0000000000000000UL /* TSB Table 1024 8-byte entries */
98#define PSYCHO_IOMMU_TSBSZ_2K 0x0000000000010000UL /* TSB Table 2048 8-byte entries */
99#define PSYCHO_IOMMU_TSBSZ_4K 0x0000000000020000UL /* TSB Table 4096 8-byte entries */
100#define PSYCHO_IOMMU_TSBSZ_8K 0x0000000000030000UL /* TSB Table 8192 8-byte entries */
101#define PSYCHO_IOMMU_TSBSZ_16K 0x0000000000040000UL /* TSB Table 16k 8-byte entries */
102#define PSYCHO_IOMMU_TSBSZ_32K 0x0000000000050000UL /* TSB Table 32k 8-byte entries */
103#define PSYCHO_IOMMU_TSBSZ_64K 0x0000000000060000UL /* TSB Table 64k 8-byte entries */
104#define PSYCHO_IOMMU_TSBSZ_128K 0x0000000000070000UL /* TSB Table 128k 8-byte entries */
105#define PSYCHO_IOMMU_CTRL_RESV2 0x000000000000fff8UL /* Reserved */
106#define PSYCHO_IOMMU_CTRL_TBWSZ 0x0000000000000004UL /* Assumed page size, 0=8k 1=64k */
107#define PSYCHO_IOMMU_CTRL_DENAB 0x0000000000000002UL /* Diagnostic mode enable */
108#define PSYCHO_IOMMU_CTRL_ENAB 0x0000000000000001UL /* IOMMU Enable */
109#define PSYCHO_IOMMU_TSBBASE 0x0208UL
110#define PSYCHO_IOMMU_FLUSH 0x0210UL
111#define PSYCHO_IOMMU_TAG 0xa580UL
1da177e4 112#define PSYCHO_IOMMU_DATA 0xa600UL
1da177e4
LT		 113
114/* Uncorrectable Errors. Cause of the error and the address are
115 * recorded in the UE_AFSR and UE_AFAR of PSYCHO. They are errors
116 * relating to UPA interface transactions.
117 */
118#define PSYCHO_UE_AFSR 0x0030UL
119#define PSYCHO_UEAFSR_PPIO 0x8000000000000000UL /* Primary PIO is cause */
120#define PSYCHO_UEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read is cause */
121#define PSYCHO_UEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write is cause */
122#define PSYCHO_UEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
123#define PSYCHO_UEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read is cause */
124#define PSYCHO_UEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write is cause*/
125#define PSYCHO_UEAFSR_RESV1 0x03ff000000000000UL /* Reserved */
126#define PSYCHO_UEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask of failed transfer */
127#define PSYCHO_UEAFSR_DOFF 0x00000000e0000000UL /* Doubleword Offset */
128#define PSYCHO_UEAFSR_MID 0x000000001f000000UL /* UPA MID causing the fault */
129#define PSYCHO_UEAFSR_BLK 0x0000000000800000UL /* Trans was block operation */
130#define PSYCHO_UEAFSR_RESV2 0x00000000007fffffUL /* Reserved */
131#define PSYCHO_UE_AFAR 0x0038UL
132
6d24c8dc 133static irqreturn_t psycho_ue_intr(int irq, void *dev_id)
1da177e4 134{
34768bc8 135 struct pci_pbm_info *pbm = dev_id;
34768bc8
DM		 136 unsigned long afsr_reg = pbm->controller_regs + PSYCHO_UE_AFSR;
137 unsigned long afar_reg = pbm->controller_regs + PSYCHO_UE_AFAR;
1da177e4
LT		 138 unsigned long afsr, afar, error_bits;
139 int reported;
140
141 /* Latch uncorrectable error status. */
87395fc6
DM		 142 afar = upa_readq(afar_reg);
143 afsr = upa_readq(afsr_reg);
1da177e4
LT		 144
145 /* Clear the primary/secondary error status bits. */
146 error_bits = afsr &
147 (PSYCHO_UEAFSR_PPIO | PSYCHO_UEAFSR_PDRD | PSYCHO_UEAFSR_PDWR |
148 PSYCHO_UEAFSR_SPIO | PSYCHO_UEAFSR_SDRD | PSYCHO_UEAFSR_SDWR);
149 if (!error_bits)
150 return IRQ_NONE;
87395fc6 151 upa_writeq(error_bits, afsr_reg);
1da177e4
LT		 152
153 /* Log the error. */
6c108f12
DM		 154 printk("%s: Uncorrectable Error, primary error type[%s]\n",
155 pbm->name,
1da177e4
LT		 156 (((error_bits & PSYCHO_UEAFSR_PPIO) ?
157 "PIO" :
158 ((error_bits & PSYCHO_UEAFSR_PDRD) ?
159 "DMA Read" :
160 ((error_bits & PSYCHO_UEAFSR_PDWR) ?
161 "DMA Write" : "???")))));
6c108f12
DM		 162 printk("%s: bytemask[%04lx] dword_offset[%lx] UPA_MID[%02lx] was_block(%d)\n",
163 pbm->name,
1da177e4
LT		 164 (afsr & PSYCHO_UEAFSR_BMSK) >> 32UL,
165 (afsr & PSYCHO_UEAFSR_DOFF) >> 29UL,
166 (afsr & PSYCHO_UEAFSR_MID) >> 24UL,
167 ((afsr & PSYCHO_UEAFSR_BLK) ? 1 : 0));
6c108f12
DM		 168 printk("%s: UE AFAR [%016lx]\n", pbm->name, afar);
169 printk("%s: UE Secondary errors [", pbm->name);
1da177e4
LT		 170 reported = 0;
171 if (afsr & PSYCHO_UEAFSR_SPIO) {
172 reported++;
173 printk("(PIO)");
174 }
175 if (afsr & PSYCHO_UEAFSR_SDRD) {
176 reported++;
177 printk("(DMA Read)");
178 }
179 if (afsr & PSYCHO_UEAFSR_SDWR) {
180 reported++;
181 printk("(DMA Write)");
182 }
183 if (!reported)
184 printk("(none)");
185 printk("]\n");
186
34768bc8 187 /* Interrogate both IOMMUs for error status. */
d3ae4b5b
DM		 188 psycho_check_iommu_error(pbm, afsr, afar, UE_ERR);
189 if (pbm->sibling)
190 psycho_check_iommu_error(pbm->sibling, afsr, afar, UE_ERR);
1da177e4
LT		 191
192 return IRQ_HANDLED;
193}
194
195/* Correctable Errors. */
196#define PSYCHO_CE_AFSR 0x0040UL
197#define PSYCHO_CEAFSR_PPIO 0x8000000000000000UL /* Primary PIO is cause */
198#define PSYCHO_CEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read is cause */
199#define PSYCHO_CEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write is cause */
200#define PSYCHO_CEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
201#define PSYCHO_CEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read is cause */
202#define PSYCHO_CEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write is cause*/
203#define PSYCHO_CEAFSR_RESV1 0x0300000000000000UL /* Reserved */
204#define PSYCHO_CEAFSR_ESYND 0x00ff000000000000UL /* Syndrome Bits */
205#define PSYCHO_CEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask of failed transfer */
206#define PSYCHO_CEAFSR_DOFF 0x00000000e0000000UL /* Double Offset */
207#define PSYCHO_CEAFSR_MID 0x000000001f000000UL /* UPA MID causing the fault */
208#define PSYCHO_CEAFSR_BLK 0x0000000000800000UL /* Trans was block operation */
209#define PSYCHO_CEAFSR_RESV2 0x00000000007fffffUL /* Reserved */
210#define PSYCHO_CE_AFAR 0x0040UL
211
6d24c8dc 212static irqreturn_t psycho_ce_intr(int irq, void *dev_id)
1da177e4 213{
34768bc8 214 struct pci_pbm_info *pbm = dev_id;
34768bc8
DM		 215 unsigned long afsr_reg = pbm->controller_regs + PSYCHO_CE_AFSR;
216 unsigned long afar_reg = pbm->controller_regs + PSYCHO_CE_AFAR;
1da177e4
LT		 217 unsigned long afsr, afar, error_bits;
218 int reported;
219
220 /* Latch error status. */
87395fc6
DM		 221 afar = upa_readq(afar_reg);
222 afsr = upa_readq(afsr_reg);
1da177e4
LT		 223
224 /* Clear primary/secondary error status bits. */
225 error_bits = afsr &
226 (PSYCHO_CEAFSR_PPIO | PSYCHO_CEAFSR_PDRD | PSYCHO_CEAFSR_PDWR |
227 PSYCHO_CEAFSR_SPIO | PSYCHO_CEAFSR_SDRD | PSYCHO_CEAFSR_SDWR);
228 if (!error_bits)
229 return IRQ_NONE;
87395fc6 230 upa_writeq(error_bits, afsr_reg);
1da177e4
LT		 231
232 /* Log the error. */
6c108f12
DM		 233 printk("%s: Correctable Error, primary error type[%s]\n",
234 pbm->name,
1da177e4
LT		 235 (((error_bits & PSYCHO_CEAFSR_PPIO) ?
236 "PIO" :
237 ((error_bits & PSYCHO_CEAFSR_PDRD) ?
238 "DMA Read" :
239 ((error_bits & PSYCHO_CEAFSR_PDWR) ?
240 "DMA Write" : "???")))));
241
242 /* XXX Use syndrome and afar to print out module string just like
243 * XXX UDB CE trap handler does... -DaveM
244 */
6c108f12 245 printk("%s: syndrome[%02lx] bytemask[%04lx] dword_offset[%lx] "
1da177e4 246 "UPA_MID[%02lx] was_block(%d)\n",
6c108f12 247 pbm->name,
1da177e4
LT		 248 (afsr & PSYCHO_CEAFSR_ESYND) >> 48UL,
249 (afsr & PSYCHO_CEAFSR_BMSK) >> 32UL,
250 (afsr & PSYCHO_CEAFSR_DOFF) >> 29UL,
251 (afsr & PSYCHO_CEAFSR_MID) >> 24UL,
252 ((afsr & PSYCHO_CEAFSR_BLK) ? 1 : 0));
6c108f12
DM		 253 printk("%s: CE AFAR [%016lx]\n", pbm->name, afar);
254 printk("%s: CE Secondary errors [", pbm->name);
1da177e4
LT		 255 reported = 0;
256 if (afsr & PSYCHO_CEAFSR_SPIO) {
257 reported++;
258 printk("(PIO)");
259 }
260 if (afsr & PSYCHO_CEAFSR_SDRD) {
261 reported++;
262 printk("(DMA Read)");
263 }
264 if (afsr & PSYCHO_CEAFSR_SDWR) {
265 reported++;
266 printk("(DMA Write)");
267 }
268 if (!reported)
269 printk("(none)");
270 printk("]\n");
271
272 return IRQ_HANDLED;
273}
274
275/* PCI Errors. They are signalled by the PCI bus module since they
276 * are associated with a specific bus segment.
277 */
278#define PSYCHO_PCI_AFSR_A 0x2010UL
279#define PSYCHO_PCI_AFSR_B 0x4010UL
1da177e4
LT		 280#define PSYCHO_PCI_AFAR_A 0x2018UL
281#define PSYCHO_PCI_AFAR_B 0x4018UL
282
1da177e4
LT		 283/* XXX What about PowerFail/PowerManagement??? -DaveM */
284#define PSYCHO_ECC_CTRL 0x0020
285#define PSYCHO_ECCCTRL_EE 0x8000000000000000UL /* Enable ECC Checking */
286#define PSYCHO_ECCCTRL_UE 0x4000000000000000UL /* Enable UE Interrupts */
287#define PSYCHO_ECCCTRL_CE 0x2000000000000000UL /* Enable CE INterrupts */
34768bc8 288static void psycho_register_error_handlers(struct pci_pbm_info *pbm)
1da177e4 289{
cd4cd730 290 struct platform_device *op = of_find_device_by_node(pbm->op->dev.of_node);
34768bc8 291 unsigned long base = pbm->controller_regs;
1da177e4 292 u64 tmp;
af80318e 293 int err;
1da177e4 294
2b1e5978
DM		 295 if (!op)
296 return;
1da177e4 297
2b1e5978 298 /* Psycho interrupt property order is:
34768bc8 299 * 0: PCIERR INO for this PBM
2b1e5978
DM		 300 * 1: UE ERR
301 * 2: CE ERR
302 * 3: POWER FAIL
303 * 4: SPARE HARDWARE
34768bc8 304 * 5: POWER MANAGEMENT
2b1e5978 305 */
1da177e4 306
1636f8ac 307 if (op->archdata.num_irqs < 6)
2b1e5978 308 return;
1da177e4 309
af80318e
DM		 310 /* We really mean to ignore the return result here. Two
311 * PCI controller share the same interrupt numbers and
a0381a94 312 * drive the same front-end hardware.
af80318e 313 */
1636f8ac 314 err = request_irq(op->archdata.irqs[1], psycho_ue_intr, IRQF_SHARED,
af80318e 315 "PSYCHO_UE", pbm);
1636f8ac 316 err = request_irq(op->archdata.irqs[2], psycho_ce_intr, IRQF_SHARED,
af80318e
DM		 317 "PSYCHO_CE", pbm);
318
319 /* This one, however, ought not to fail. We can just warn
320 * about it since the system can still operate properly even
321 * if this fails.
322 */
1636f8ac 323 err = request_irq(op->archdata.irqs[0], psycho_pcierr_intr, IRQF_SHARED,
af80318e
DM		 324 "PSYCHO_PCIERR", pbm);
325 if (err)
326 printk(KERN_WARNING "%s: Could not register PCIERR, "
327 "err=%d\n", pbm->name, err);
1da177e4
LT		 328
329 /* Enable UE and CE interrupts for controller. */
87395fc6
DM		 330 upa_writeq((PSYCHO_ECCCTRL_EE |
331 PSYCHO_ECCCTRL_UE |
332 PSYCHO_ECCCTRL_CE), base + PSYCHO_ECC_CTRL);
1da177e4
LT		 333
334 /* Enable PCI Error interrupts and clear error
335 * bits for each PBM.
336 */
87395fc6 337 tmp = upa_readq(base + PSYCHO_PCIA_CTRL);
1da177e4
LT		 338 tmp |= (PSYCHO_PCICTRL_SERR |
339 PSYCHO_PCICTRL_SBH_ERR |
340 PSYCHO_PCICTRL_EEN);
341 tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
87395fc6 342 upa_writeq(tmp, base + PSYCHO_PCIA_CTRL);
1da177e4 343
87395fc6 344 tmp = upa_readq(base + PSYCHO_PCIB_CTRL);
1da177e4
LT		 345 tmp |= (PSYCHO_PCICTRL_SERR |
346 PSYCHO_PCICTRL_SBH_ERR |
347 PSYCHO_PCICTRL_EEN);
348 tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
87395fc6 349 upa_writeq(tmp, base + PSYCHO_PCIB_CTRL);
1da177e4
LT		 350}
351
352/* PSYCHO boot time probing and initialization. */
085ae41f 353static void pbm_config_busmastering(struct pci_pbm_info *pbm)
1da177e4
LT		 354{
355 u8 *addr;
356
357 /* Set cache-line size to 64 bytes, this is actually
358 * a nop but I do it for completeness.
359 */
360 addr = psycho_pci_config_mkaddr(pbm, pbm->pci_first_busno,
361 0, PCI_CACHE_LINE_SIZE);
362 pci_config_write8(addr, 64 / sizeof(u32));
363
364 /* Set PBM latency timer to 64 PCI clocks. */
365 addr = psycho_pci_config_mkaddr(pbm, pbm->pci_first_busno,
366 0, PCI_LATENCY_TIMER);
367 pci_config_write8(addr, 64);
368}
369
b7c13f76
SR		 370static void psycho_scan_bus(struct pci_pbm_info *pbm,
371 struct device *parent)
1da177e4 372{
34768bc8
DM		 373 pbm_config_busmastering(pbm);
374 pbm->is_66mhz_capable = 0;
e822358a 375 pbm->pci_bus = pci_scan_one_pbm(pbm, parent);
1da177e4
LT		 376
377 /* After the PCI bus scan is complete, we can register
378 * the error interrupt handlers.
379 */
34768bc8 380 psycho_register_error_handlers(pbm);
1da177e4
LT		 381}
382
1da177e4
LT		 383#define PSYCHO_IRQ_RETRY 0x1a00UL
384#define PSYCHO_PCIA_DIAG 0x2020UL
385#define PSYCHO_PCIB_DIAG 0x4020UL
386#define PSYCHO_PCIDIAG_RESV 0xffffffffffffff80UL /* Reserved */
387#define PSYCHO_PCIDIAG_DRETRY 0x0000000000000040UL /* Disable retry limit */
388#define PSYCHO_PCIDIAG_DISYNC 0x0000000000000020UL /* Disable DMA wr / irq sync */
389#define PSYCHO_PCIDIAG_DDWSYNC 0x0000000000000010UL /* Disable DMA wr / PIO rd sync */
390#define PSYCHO_PCIDIAG_IDDPAR 0x0000000000000008UL /* Invert DMA data parity */
391#define PSYCHO_PCIDIAG_IPDPAR 0x0000000000000004UL /* Invert PIO data parity */
392#define PSYCHO_PCIDIAG_IPAPAR 0x0000000000000002UL /* Invert PIO address parity */
393#define PSYCHO_PCIDIAG_LPBACK 0x0000000000000001UL /* Enable loopback mode */
394
28113a99 395static void psycho_controller_hwinit(struct pci_pbm_info *pbm)
1da177e4
LT		 396{
397 u64 tmp;
398
87395fc6 399 upa_writeq(5, pbm->controller_regs + PSYCHO_IRQ_RETRY);
1da177e4
LT		 400
401 /* Enable arbiter for all PCI slots. */
87395fc6 402 tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIA_CTRL);
1da177e4 403 tmp |= PSYCHO_PCICTRL_AEN;
87395fc6 404 upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIA_CTRL);
1da177e4 405
87395fc6 406 tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIB_CTRL);
1da177e4 407 tmp |= PSYCHO_PCICTRL_AEN;
87395fc6 408 upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIB_CTRL);
1da177e4
LT		 409
410 /* Disable DMA write / PIO read synchronization on
411 * both PCI bus segments.
412 * [ U2P Erratum 1243770, STP2223BGA data sheet ]
413 */
87395fc6 414 tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIA_DIAG);
1da177e4 415 tmp |= PSYCHO_PCIDIAG_DDWSYNC;
87395fc6 416 upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIA_DIAG);
1da177e4 417
87395fc6 418 tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIB_DIAG);
1da177e4 419 tmp |= PSYCHO_PCIDIAG_DDWSYNC;
87395fc6 420 upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIB_DIAG);
1da177e4
LT		 421}
422
28113a99 423static void psycho_pbm_strbuf_init(struct pci_pbm_info *pbm,
1da177e4
LT		 424 int is_pbm_a)
425{
426 unsigned long base = pbm->controller_regs;
427 u64 control;
428
429 if (is_pbm_a) {
430 pbm->stc.strbuf_control = base + PSYCHO_STRBUF_CONTROL_A;
431 pbm->stc.strbuf_pflush = base + PSYCHO_STRBUF_FLUSH_A;
432 pbm->stc.strbuf_fsync = base + PSYCHO_STRBUF_FSYNC_A;
d3ae4b5b
DM		 433 pbm->stc.strbuf_err_stat = base + PSYCHO_STC_ERR_A;
434 pbm->stc.strbuf_tag_diag = base + PSYCHO_STC_TAG_A;
435 pbm->stc.strbuf_line_diag= base + PSYCHO_STC_LINE_A;
1da177e4
LT		 436 } else {
437 pbm->stc.strbuf_control = base + PSYCHO_STRBUF_CONTROL_B;
438 pbm->stc.strbuf_pflush = base + PSYCHO_STRBUF_FLUSH_B;
439 pbm->stc.strbuf_fsync = base + PSYCHO_STRBUF_FSYNC_B;
d3ae4b5b
DM		 440 pbm->stc.strbuf_err_stat = base + PSYCHO_STC_ERR_B;
441 pbm->stc.strbuf_tag_diag = base + PSYCHO_STC_TAG_B;
442 pbm->stc.strbuf_line_diag= base + PSYCHO_STC_LINE_B;
1da177e4
LT		 443 }
444 /* PSYCHO's streaming buffer lacks ctx flushing. */
445 pbm->stc.strbuf_ctxflush = 0;
446 pbm->stc.strbuf_ctxmatch_base = 0;
447
448 pbm->stc.strbuf_flushflag = (volatile unsigned long *)
449 ((((unsigned long)&pbm->stc.__flushflag_buf[0])
450 + 63UL)
451 & ~63UL);
452 pbm->stc.strbuf_flushflag_pa = (unsigned long)
453 __pa(pbm->stc.strbuf_flushflag);
454
455 /* Enable the streaming buffer. We have to be careful
456 * just in case OBP left it with LRU locking enabled.
457 *
458 * It is possible to control if PBM will be rerun on
459 * line misses. Currently I just retain whatever setting
460 * OBP left us with. All checks so far show it having
461 * a value of zero.
462 */
463#undef PSYCHO_STRBUF_RERUN_ENABLE
464#undef PSYCHO_STRBUF_RERUN_DISABLE
87395fc6 465 control = upa_readq(pbm->stc.strbuf_control);
1da177e4
LT		 466 control |= PSYCHO_STRBUF_CTRL_ENAB;
467 control &= ~(PSYCHO_STRBUF_CTRL_LENAB | PSYCHO_STRBUF_CTRL_LPTR);
468#ifdef PSYCHO_STRBUF_RERUN_ENABLE
469 control &= ~(PSYCHO_STRBUF_CTRL_RRDIS);
470#else
471#ifdef PSYCHO_STRBUF_RERUN_DISABLE
472 control |= PSYCHO_STRBUF_CTRL_RRDIS;
473#endif
474#endif
87395fc6 475 upa_writeq(control, pbm->stc.strbuf_control);
1da177e4
LT		 476
477 pbm->stc.strbuf_enabled = 1;
478}
479
480#define PSYCHO_IOSPACE_A 0x002000000UL
481#define PSYCHO_IOSPACE_B 0x002010000UL
482#define PSYCHO_IOSPACE_SIZE 0x00000ffffUL
483#define PSYCHO_MEMSPACE_A 0x100000000UL
484#define PSYCHO_MEMSPACE_B 0x180000000UL
485#define PSYCHO_MEMSPACE_SIZE 0x07fffffffUL
486
b7c13f76
SR		 487static void psycho_pbm_init(struct pci_pbm_info *pbm,
488 struct platform_device *op, int is_pbm_a)
1da177e4 489{
1c03a55c 490 psycho_pbm_init_common(pbm, op, "PSYCHO", PBM_CHIP_TYPE_PSYCHO);
28113a99 491 psycho_pbm_strbuf_init(pbm, is_pbm_a);
e822358a 492 psycho_scan_bus(pbm, &op->dev);
1da177e4
LT		 493}
494
b7c13f76 495static struct pci_pbm_info *psycho_find_sibling(u32 upa_portid)
d3ae4b5b
DM		 496{
497 struct pci_pbm_info *pbm;
498
499 for (pbm = pci_pbm_root; pbm; pbm = pbm->next) {
500 if (pbm->portid == upa_portid)
501 return pbm;
502 }
503 return NULL;
504}
505
1da177e4
LT		 506#define PSYCHO_CONFIGSPACE 0x001000000UL
507
b7c13f76 508static int psycho_probe(struct platform_device *op)
1da177e4 509{
b20bfe41 510 const struct linux_prom64_registers *pr_regs;
61c7a080 511 struct device_node *dp = op->dev.of_node;
34768bc8 512 struct pci_pbm_info *pbm;
16ce82d8 513 struct iommu *iommu;
b20bfe41 514 int is_pbm_a, err;
1da177e4 515 u32 upa_portid;
1da177e4 516
0f73d1bb 517 upa_portid = of_getintprop_default(dp, "upa-portid", 0xff);
1da177e4 518
b20bfe41 519 err = -ENOMEM;
d3ae4b5b
DM		 520 pbm = kzalloc(sizeof(*pbm), GFP_KERNEL);
521 if (!pbm) {
522 printk(KERN_ERR PFX "Cannot allocate pci_pbm_info.\n");
d7472c38 523 goto out_err;
b20bfe41
DM		 524 }
525
d3ae4b5b
DM		 526 pbm->sibling = psycho_find_sibling(upa_portid);
527 if (pbm->sibling) {
528 iommu = pbm->sibling->iommu;
529 } else {
530 iommu = kzalloc(sizeof(struct iommu), GFP_KERNEL);
531 if (!iommu) {
532 printk(KERN_ERR PFX "Cannot allocate PBM iommu.\n");
533 goto out_free_controller;
534 }
b20bfe41 535 }
ad7ad57c 536
d3ae4b5b
DM		 537 pbm->iommu = iommu;
538 pbm->portid = upa_portid;
1da177e4 539
b20bfe41
DM		 540 pr_regs = of_get_property(dp, "reg", NULL);
541 err = -ENODEV;
542 if (!pr_regs) {
543 printk(KERN_ERR PFX "No reg property.\n");
d7472c38 544 goto out_free_iommu;
b20bfe41 545 }
1da177e4 546
d3ae4b5b
DM		 547 is_pbm_a = ((pr_regs[0].phys_addr & 0x6000) == 0x2000);
548
549 pbm->controller_regs = pr_regs[2].phys_addr;
550 pbm->config_space = (pr_regs[2].phys_addr + PSYCHO_CONFIGSPACE);
1da177e4 551
d3ae4b5b
DM		 552 if (is_pbm_a) {
553 pbm->pci_afsr = pbm->controller_regs + PSYCHO_PCI_AFSR_A;
554 pbm->pci_afar = pbm->controller_regs + PSYCHO_PCI_AFAR_A;
555 pbm->pci_csr = pbm->controller_regs + PSYCHO_PCIA_CTRL;
556 } else {
557 pbm->pci_afsr = pbm->controller_regs + PSYCHO_PCI_AFSR_B;
558 pbm->pci_afar = pbm->controller_regs + PSYCHO_PCI_AFAR_B;
559 pbm->pci_csr = pbm->controller_regs + PSYCHO_PCIB_CTRL;
560 }
1da177e4 561
d3ae4b5b
DM		 562 psycho_controller_hwinit(pbm);
563 if (!pbm->sibling) {
a21cff3e
DM		 564 err = psycho_iommu_init(pbm, 128, 0xc0000000,
565 0xffffffff, PSYCHO_CONTROL);
d3ae4b5b
DM		 566 if (err)
567 goto out_free_iommu;
a21cff3e
DM		 568
569 /* If necessary, hook us up for starfire IRQ translations. */
570 if (this_is_starfire)
571 starfire_hookup(pbm->portid);
d3ae4b5b 572 }
1da177e4 573
d3ae4b5b 574 psycho_pbm_init(pbm, op, is_pbm_a);
1da177e4 575
1c03a55c
DM		 576 pbm->next = pci_pbm_root;
577 pci_pbm_root = pbm;
578
d3ae4b5b
DM		 579 if (pbm->sibling)
580 pbm->sibling->sibling = pbm;
b20bfe41 581
d3ae4b5b 582 dev_set_drvdata(&op->dev, pbm);
ad7ad57c 583
b20bfe41
DM		 584 return 0;
585
d7472c38 586out_free_iommu:
d3ae4b5b
DM		 587 if (!pbm->sibling)
588 kfree(pbm->iommu);
d7472c38
DM		 589
590out_free_controller:
d3ae4b5b 591 kfree(pbm);
d7472c38
DM		 592
593out_err:
b20bfe41
DM		 594 return err;
595}
596
3628aa06 597static const struct of_device_id psycho_match[] = {
b20bfe41
DM		 598 {
599 .name = "pci",
600 .compatible = "pci108e,8000",
601 },
602 {},
603};
604
4ebb24f7 605static struct platform_driver psycho_driver = {
4018294b
GL		 606 .driver = {
607 .name = DRIVER_NAME,
4018294b
GL		 608 .of_match_table = psycho_match,
609 },
b20bfe41
DM		 610 .probe = psycho_probe,
611};
612
613static int __init psycho_init(void)
614{
4ebb24f7 615 return platform_driver_register(&psycho_driver);
1da177e4 616}
b20bfe41
DM		 617
618subsys_initcall(psycho_init);
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