1 // SPDX-License-Identifier: GPL-2.0
2 /* pci_psycho.c: PSYCHO/U2P specific PCI controller support.
3 *
4 * Copyright (C) 1997, 1998, 1999, 2007 David S. Miller (davem@davemloft.net)
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>
13 #include <linux/export.h>
14 #include <linux/slab.h>
15 #include <linux/interrupt.h>
16 #include <linux/of.h>
17 #include <linux/of_platform.h>
18 #include <linux/platform_device.h>
19
20 #include <asm/iommu.h>
21 #include <asm/irq.h>
22 #include <asm/starfire.h>
23 #include <asm/prom.h>
24 #include <asm/upa.h>
25
26 #include "pci_impl.h"
27 #include "iommu_common.h"
28 #include "psycho_common.h"
29
30 #define DRIVER_NAME "psycho"
31 #define PFX DRIVER_NAME ": "
32
33 /* Misc. PSYCHO PCI controller register offsets and definitions. */
34 #define PSYCHO_CONTROL 0x0010UL
35 #define PSYCHO_CONTROL_IMPL 0xf000000000000000UL /* Implementation of this PSYCHO*/
36 #define PSYCHO_CONTROL_VER 0x0f00000000000000UL /* Version of this PSYCHO */
37 #define PSYCHO_CONTROL_MID 0x00f8000000000000UL /* UPA Module ID of PSYCHO */
38 #define PSYCHO_CONTROL_IGN 0x0007c00000000000UL /* Interrupt Group Number */
39 #define PSYCHO_CONTROL_RESV 0x00003ffffffffff0UL /* Reserved */
40 #define PSYCHO_CONTROL_APCKEN 0x0000000000000008UL /* Address Parity Check Enable */
41 #define PSYCHO_CONTROL_APERR 0x0000000000000004UL /* Incoming System Addr Parerr */
42 #define PSYCHO_CONTROL_IAP 0x0000000000000002UL /* Invert UPA Parity */
43 #define PSYCHO_CONTROL_MODE 0x0000000000000001UL /* PSYCHO clock mode */
44 #define PSYCHO_PCIA_CTRL 0x2000UL
45 #define PSYCHO_PCIB_CTRL 0x4000UL
46 #define PSYCHO_PCICTRL_RESV1 0xfffffff000000000UL /* Reserved */
47 #define PSYCHO_PCICTRL_SBH_ERR 0x0000000800000000UL /* Streaming byte hole error */
48 #define PSYCHO_PCICTRL_SERR 0x0000000400000000UL /* SERR signal asserted */
49 #define PSYCHO_PCICTRL_SPEED 0x0000000200000000UL /* PCI speed (1 is U2P clock) */
50 #define PSYCHO_PCICTRL_RESV2 0x00000001ffc00000UL /* Reserved */
51 #define PSYCHO_PCICTRL_ARB_PARK 0x0000000000200000UL /* PCI arbitration parking */
52 #define PSYCHO_PCICTRL_RESV3 0x00000000001ff800UL /* Reserved */
53 #define PSYCHO_PCICTRL_SBH_INT 0x0000000000000400UL /* Streaming byte hole int enab */
54 #define PSYCHO_PCICTRL_WEN 0x0000000000000200UL /* Power Mgmt Wake Enable */
55 #define PSYCHO_PCICTRL_EEN 0x0000000000000100UL /* PCI Error Interrupt Enable */
56 #define PSYCHO_PCICTRL_RESV4 0x00000000000000c0UL /* Reserved */
57 #define PSYCHO_PCICTRL_AEN 0x000000000000003fUL /* PCI DVMA Arbitration Enable */
58
59 /* PSYCHO error handling support. */
60
61 /* Helper function of IOMMU error checking, which checks out
62 * the state of the streaming buffers. The IOMMU lock is
63 * held when this is called.
64 *
65 * For the PCI error case we know which PBM (and thus which
66 * streaming buffer) caused the error, but for the uncorrectable
67 * error case we do not. So we always check both streaming caches.
68 */
69 #define PSYCHO_STRBUF_CONTROL_A 0x2800UL
70 #define PSYCHO_STRBUF_CONTROL_B 0x4800UL
71 #define PSYCHO_STRBUF_CTRL_LPTR 0x00000000000000f0UL /* LRU Lock Pointer */
72 #define PSYCHO_STRBUF_CTRL_LENAB 0x0000000000000008UL /* LRU Lock Enable */
73 #define PSYCHO_STRBUF_CTRL_RRDIS 0x0000000000000004UL /* Rerun Disable */
74 #define PSYCHO_STRBUF_CTRL_DENAB 0x0000000000000002UL /* Diagnostic Mode Enable */
75 #define PSYCHO_STRBUF_CTRL_ENAB 0x0000000000000001UL /* Streaming Buffer Enable */
76 #define PSYCHO_STRBUF_FLUSH_A 0x2808UL
77 #define PSYCHO_STRBUF_FLUSH_B 0x4808UL
78 #define PSYCHO_STRBUF_FSYNC_A 0x2810UL
79 #define PSYCHO_STRBUF_FSYNC_B 0x4810UL
80 #define PSYCHO_STC_DATA_A 0xb000UL
81 #define PSYCHO_STC_DATA_B 0xc000UL
82 #define PSYCHO_STC_ERR_A 0xb400UL
83 #define PSYCHO_STC_ERR_B 0xc400UL
84 #define PSYCHO_STC_TAG_A 0xb800UL
85 #define PSYCHO_STC_TAG_B 0xc800UL
86 #define PSYCHO_STC_LINE_A 0xb900UL
87 #define PSYCHO_STC_LINE_B 0xc900UL
88
89 /* When an Uncorrectable Error or a PCI Error happens, we
90 * interrogate the IOMMU state to see if it is the cause.
91 */
92 #define PSYCHO_IOMMU_CONTROL 0x0200UL
93 #define PSYCHO_IOMMU_CTRL_RESV 0xfffffffff9000000UL /* Reserved */
94 #define PSYCHO_IOMMU_CTRL_XLTESTAT 0x0000000006000000UL /* Translation Error Status */
95 #define PSYCHO_IOMMU_CTRL_XLTEERR 0x0000000001000000UL /* Translation Error encountered */
96 #define PSYCHO_IOMMU_CTRL_LCKEN 0x0000000000800000UL /* Enable translation locking */
97 #define PSYCHO_IOMMU_CTRL_LCKPTR 0x0000000000780000UL /* Translation lock pointer */
98 #define PSYCHO_IOMMU_CTRL_TSBSZ 0x0000000000070000UL /* TSB Size */
99 #define PSYCHO_IOMMU_TSBSZ_1K 0x0000000000000000UL /* TSB Table 1024 8-byte entries */
100 #define PSYCHO_IOMMU_TSBSZ_2K 0x0000000000010000UL /* TSB Table 2048 8-byte entries */
101 #define PSYCHO_IOMMU_TSBSZ_4K 0x0000000000020000UL /* TSB Table 4096 8-byte entries */
102 #define PSYCHO_IOMMU_TSBSZ_8K 0x0000000000030000UL /* TSB Table 8192 8-byte entries */
103 #define PSYCHO_IOMMU_TSBSZ_16K 0x0000000000040000UL /* TSB Table 16k 8-byte entries */
104 #define PSYCHO_IOMMU_TSBSZ_32K 0x0000000000050000UL /* TSB Table 32k 8-byte entries */
105 #define PSYCHO_IOMMU_TSBSZ_64K 0x0000000000060000UL /* TSB Table 64k 8-byte entries */
106 #define PSYCHO_IOMMU_TSBSZ_128K 0x0000000000070000UL /* TSB Table 128k 8-byte entries */
107 #define PSYCHO_IOMMU_CTRL_RESV2 0x000000000000fff8UL /* Reserved */
108 #define PSYCHO_IOMMU_CTRL_TBWSZ 0x0000000000000004UL /* Assumed page size, 0=8k 1=64k */
109 #define PSYCHO_IOMMU_CTRL_DENAB 0x0000000000000002UL /* Diagnostic mode enable */
110 #define PSYCHO_IOMMU_CTRL_ENAB 0x0000000000000001UL /* IOMMU Enable */
111 #define PSYCHO_IOMMU_TSBBASE 0x0208UL
112 #define PSYCHO_IOMMU_FLUSH 0x0210UL
113 #define PSYCHO_IOMMU_TAG 0xa580UL
114 #define PSYCHO_IOMMU_DATA 0xa600UL
115
116 /* Uncorrectable Errors. Cause of the error and the address are
117 * recorded in the UE_AFSR and UE_AFAR of PSYCHO. They are errors
118 * relating to UPA interface transactions.
119 */
120 #define PSYCHO_UE_AFSR 0x0030UL
121 #define PSYCHO_UEAFSR_PPIO 0x8000000000000000UL /* Primary PIO is cause */
122 #define PSYCHO_UEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read is cause */
123 #define PSYCHO_UEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write is cause */
124 #define PSYCHO_UEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
125 #define PSYCHO_UEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read is cause */
126 #define PSYCHO_UEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write is cause*/
127 #define PSYCHO_UEAFSR_RESV1 0x03ff000000000000UL /* Reserved */
128 #define PSYCHO_UEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask of failed transfer */
129 #define PSYCHO_UEAFSR_DOFF 0x00000000e0000000UL /* Doubleword Offset */
130 #define PSYCHO_UEAFSR_MID 0x000000001f000000UL /* UPA MID causing the fault */
131 #define PSYCHO_UEAFSR_BLK 0x0000000000800000UL /* Trans was block operation */
132 #define PSYCHO_UEAFSR_RESV2 0x00000000007fffffUL /* Reserved */
133 #define PSYCHO_UE_AFAR 0x0038UL
134
psycho_ue_intr(int irq,void * dev_id)135 static irqreturn_t psycho_ue_intr(int irq, void *dev_id)
136 {
137 struct pci_pbm_info *pbm = dev_id;
138 unsigned long afsr_reg = pbm->controller_regs + PSYCHO_UE_AFSR;
139 unsigned long afar_reg = pbm->controller_regs + PSYCHO_UE_AFAR;
140 unsigned long afsr, afar, error_bits;
141 int reported;
142
143 /* Latch uncorrectable error status. */
144 afar = upa_readq(afar_reg);
145 afsr = upa_readq(afsr_reg);
146
147 /* Clear the primary/secondary error status bits. */
148 error_bits = afsr &
149 (PSYCHO_UEAFSR_PPIO | PSYCHO_UEAFSR_PDRD | PSYCHO_UEAFSR_PDWR |
150 PSYCHO_UEAFSR_SPIO | PSYCHO_UEAFSR_SDRD | PSYCHO_UEAFSR_SDWR);
151 if (!error_bits)
152 return IRQ_NONE;
153 upa_writeq(error_bits, afsr_reg);
154
155 /* Log the error. */
156 printk("%s: Uncorrectable Error, primary error type[%s]\n",
157 pbm->name,
158 (((error_bits & PSYCHO_UEAFSR_PPIO) ?
159 "PIO" :
160 ((error_bits & PSYCHO_UEAFSR_PDRD) ?
161 "DMA Read" :
162 ((error_bits & PSYCHO_UEAFSR_PDWR) ?
163 "DMA Write" : "???")))));
164 printk("%s: bytemask[%04lx] dword_offset[%lx] UPA_MID[%02lx] was_block(%d)\n",
165 pbm->name,
166 (afsr & PSYCHO_UEAFSR_BMSK) >> 32UL,
167 (afsr & PSYCHO_UEAFSR_DOFF) >> 29UL,
168 (afsr & PSYCHO_UEAFSR_MID) >> 24UL,
169 ((afsr & PSYCHO_UEAFSR_BLK) ? 1 : 0));
170 printk("%s: UE AFAR [%016lx]\n", pbm->name, afar);
171 printk("%s: UE Secondary errors [", pbm->name);
172 reported = 0;
173 if (afsr & PSYCHO_UEAFSR_SPIO) {
174 reported++;
175 printk("(PIO)");
176 }
177 if (afsr & PSYCHO_UEAFSR_SDRD) {
178 reported++;
179 printk("(DMA Read)");
180 }
181 if (afsr & PSYCHO_UEAFSR_SDWR) {
182 reported++;
183 printk("(DMA Write)");
184 }
185 if (!reported)
186 printk("(none)");
187 printk("]\n");
188
189 /* Interrogate both IOMMUs for error status. */
190 psycho_check_iommu_error(pbm, afsr, afar, UE_ERR);
191 if (pbm->sibling)
192 psycho_check_iommu_error(pbm->sibling, afsr, afar, UE_ERR);
193
194 return IRQ_HANDLED;
195 }
196
197 /* Correctable Errors. */
198 #define PSYCHO_CE_AFSR 0x0040UL
199 #define PSYCHO_CEAFSR_PPIO 0x8000000000000000UL /* Primary PIO is cause */
200 #define PSYCHO_CEAFSR_PDRD 0x4000000000000000UL /* Primary DVMA read is cause */
201 #define PSYCHO_CEAFSR_PDWR 0x2000000000000000UL /* Primary DVMA write is cause */
202 #define PSYCHO_CEAFSR_SPIO 0x1000000000000000UL /* Secondary PIO is cause */
203 #define PSYCHO_CEAFSR_SDRD 0x0800000000000000UL /* Secondary DVMA read is cause */
204 #define PSYCHO_CEAFSR_SDWR 0x0400000000000000UL /* Secondary DVMA write is cause*/
205 #define PSYCHO_CEAFSR_RESV1 0x0300000000000000UL /* Reserved */
206 #define PSYCHO_CEAFSR_ESYND 0x00ff000000000000UL /* Syndrome Bits */
207 #define PSYCHO_CEAFSR_BMSK 0x0000ffff00000000UL /* Bytemask of failed transfer */
208 #define PSYCHO_CEAFSR_DOFF 0x00000000e0000000UL /* Double Offset */
209 #define PSYCHO_CEAFSR_MID 0x000000001f000000UL /* UPA MID causing the fault */
210 #define PSYCHO_CEAFSR_BLK 0x0000000000800000UL /* Trans was block operation */
211 #define PSYCHO_CEAFSR_RESV2 0x00000000007fffffUL /* Reserved */
212 #define PSYCHO_CE_AFAR 0x0040UL
213
psycho_ce_intr(int irq,void * dev_id)214 static irqreturn_t psycho_ce_intr(int irq, void *dev_id)
215 {
216 struct pci_pbm_info *pbm = dev_id;
217 unsigned long afsr_reg = pbm->controller_regs + PSYCHO_CE_AFSR;
218 unsigned long afar_reg = pbm->controller_regs + PSYCHO_CE_AFAR;
219 unsigned long afsr, afar, error_bits;
220 int reported;
221
222 /* Latch error status. */
223 afar = upa_readq(afar_reg);
224 afsr = upa_readq(afsr_reg);
225
226 /* Clear primary/secondary error status bits. */
227 error_bits = afsr &
228 (PSYCHO_CEAFSR_PPIO | PSYCHO_CEAFSR_PDRD | PSYCHO_CEAFSR_PDWR |
229 PSYCHO_CEAFSR_SPIO | PSYCHO_CEAFSR_SDRD | PSYCHO_CEAFSR_SDWR);
230 if (!error_bits)
231 return IRQ_NONE;
232 upa_writeq(error_bits, afsr_reg);
233
234 /* Log the error. */
235 printk("%s: Correctable Error, primary error type[%s]\n",
236 pbm->name,
237 (((error_bits & PSYCHO_CEAFSR_PPIO) ?
238 "PIO" :
239 ((error_bits & PSYCHO_CEAFSR_PDRD) ?
240 "DMA Read" :
241 ((error_bits & PSYCHO_CEAFSR_PDWR) ?
242 "DMA Write" : "???")))));
243
244 /* XXX Use syndrome and afar to print out module string just like
245 * XXX UDB CE trap handler does... -DaveM
246 */
247 printk("%s: syndrome[%02lx] bytemask[%04lx] dword_offset[%lx] "
248 "UPA_MID[%02lx] was_block(%d)\n",
249 pbm->name,
250 (afsr & PSYCHO_CEAFSR_ESYND) >> 48UL,
251 (afsr & PSYCHO_CEAFSR_BMSK) >> 32UL,
252 (afsr & PSYCHO_CEAFSR_DOFF) >> 29UL,
253 (afsr & PSYCHO_CEAFSR_MID) >> 24UL,
254 ((afsr & PSYCHO_CEAFSR_BLK) ? 1 : 0));
255 printk("%s: CE AFAR [%016lx]\n", pbm->name, afar);
256 printk("%s: CE Secondary errors [", pbm->name);
257 reported = 0;
258 if (afsr & PSYCHO_CEAFSR_SPIO) {
259 reported++;
260 printk("(PIO)");
261 }
262 if (afsr & PSYCHO_CEAFSR_SDRD) {
263 reported++;
264 printk("(DMA Read)");
265 }
266 if (afsr & PSYCHO_CEAFSR_SDWR) {
267 reported++;
268 printk("(DMA Write)");
269 }
270 if (!reported)
271 printk("(none)");
272 printk("]\n");
273
274 return IRQ_HANDLED;
275 }
276
277 /* PCI Errors. They are signalled by the PCI bus module since they
278 * are associated with a specific bus segment.
279 */
280 #define PSYCHO_PCI_AFSR_A 0x2010UL
281 #define PSYCHO_PCI_AFSR_B 0x4010UL
282 #define PSYCHO_PCI_AFAR_A 0x2018UL
283 #define PSYCHO_PCI_AFAR_B 0x4018UL
284
285 /* XXX What about PowerFail/PowerManagement??? -DaveM */
286 #define PSYCHO_ECC_CTRL 0x0020
287 #define PSYCHO_ECCCTRL_EE 0x8000000000000000UL /* Enable ECC Checking */
288 #define PSYCHO_ECCCTRL_UE 0x4000000000000000UL /* Enable UE Interrupts */
289 #define PSYCHO_ECCCTRL_CE 0x2000000000000000UL /* Enable CE INterrupts */
psycho_register_error_handlers(struct pci_pbm_info * pbm)290 static void psycho_register_error_handlers(struct pci_pbm_info *pbm)
291 {
292 struct platform_device *op = of_find_device_by_node(pbm->op->dev.of_node);
293 unsigned long base = pbm->controller_regs;
294 u64 tmp;
295 int err;
296
297 if (!op)
298 return;
299
300 /* Psycho interrupt property order is:
301 * 0: PCIERR INO for this PBM
302 * 1: UE ERR
303 * 2: CE ERR
304 * 3: POWER FAIL
305 * 4: SPARE HARDWARE
306 * 5: POWER MANAGEMENT
307 */
308
309 if (op->archdata.num_irqs < 6)
310 return;
311
312 /* We really mean to ignore the return result here. Two
313 * PCI controller share the same interrupt numbers and
314 * drive the same front-end hardware.
315 */
316 err = request_irq(op->archdata.irqs[1], psycho_ue_intr, IRQF_SHARED,
317 "PSYCHO_UE", pbm);
318 err = request_irq(op->archdata.irqs[2], psycho_ce_intr, IRQF_SHARED,
319 "PSYCHO_CE", pbm);
320
321 /* This one, however, ought not to fail. We can just warn
322 * about it since the system can still operate properly even
323 * if this fails.
324 */
325 err = request_irq(op->archdata.irqs[0], psycho_pcierr_intr, IRQF_SHARED,
326 "PSYCHO_PCIERR", pbm);
327 if (err)
328 printk(KERN_WARNING "%s: Could not register PCIERR, "
329 "err=%d\n", pbm->name, err);
330
331 /* Enable UE and CE interrupts for controller. */
332 upa_writeq((PSYCHO_ECCCTRL_EE |
333 PSYCHO_ECCCTRL_UE |
334 PSYCHO_ECCCTRL_CE), base + PSYCHO_ECC_CTRL);
335
336 /* Enable PCI Error interrupts and clear error
337 * bits for each PBM.
338 */
339 tmp = upa_readq(base + PSYCHO_PCIA_CTRL);
340 tmp |= (PSYCHO_PCICTRL_SERR |
341 PSYCHO_PCICTRL_SBH_ERR |
342 PSYCHO_PCICTRL_EEN);
343 tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
344 upa_writeq(tmp, base + PSYCHO_PCIA_CTRL);
345
346 tmp = upa_readq(base + PSYCHO_PCIB_CTRL);
347 tmp |= (PSYCHO_PCICTRL_SERR |
348 PSYCHO_PCICTRL_SBH_ERR |
349 PSYCHO_PCICTRL_EEN);
350 tmp &= ~(PSYCHO_PCICTRL_SBH_INT);
351 upa_writeq(tmp, base + PSYCHO_PCIB_CTRL);
352 }
353
354 /* PSYCHO boot time probing and initialization. */
pbm_config_busmastering(struct pci_pbm_info * pbm)355 static void pbm_config_busmastering(struct pci_pbm_info *pbm)
356 {
357 u8 *addr;
358
359 /* Set cache-line size to 64 bytes, this is actually
360 * a nop but I do it for completeness.
361 */
362 addr = psycho_pci_config_mkaddr(pbm, pbm->pci_first_busno,
363 0, PCI_CACHE_LINE_SIZE);
364 pci_config_write8(addr, 64 / sizeof(u32));
365
366 /* Set PBM latency timer to 64 PCI clocks. */
367 addr = psycho_pci_config_mkaddr(pbm, pbm->pci_first_busno,
368 0, PCI_LATENCY_TIMER);
369 pci_config_write8(addr, 64);
370 }
371
psycho_scan_bus(struct pci_pbm_info * pbm,struct device * parent)372 static void psycho_scan_bus(struct pci_pbm_info *pbm,
373 struct device *parent)
374 {
375 pbm_config_busmastering(pbm);
376 pbm->is_66mhz_capable = 0;
377 pbm->pci_bus = pci_scan_one_pbm(pbm, parent);
378
379 /* After the PCI bus scan is complete, we can register
380 * the error interrupt handlers.
381 */
382 psycho_register_error_handlers(pbm);
383 }
384
385 #define PSYCHO_IRQ_RETRY 0x1a00UL
386 #define PSYCHO_PCIA_DIAG 0x2020UL
387 #define PSYCHO_PCIB_DIAG 0x4020UL
388 #define PSYCHO_PCIDIAG_RESV 0xffffffffffffff80UL /* Reserved */
389 #define PSYCHO_PCIDIAG_DRETRY 0x0000000000000040UL /* Disable retry limit */
390 #define PSYCHO_PCIDIAG_DISYNC 0x0000000000000020UL /* Disable DMA wr / irq sync */
391 #define PSYCHO_PCIDIAG_DDWSYNC 0x0000000000000010UL /* Disable DMA wr / PIO rd sync */
392 #define PSYCHO_PCIDIAG_IDDPAR 0x0000000000000008UL /* Invert DMA data parity */
393 #define PSYCHO_PCIDIAG_IPDPAR 0x0000000000000004UL /* Invert PIO data parity */
394 #define PSYCHO_PCIDIAG_IPAPAR 0x0000000000000002UL /* Invert PIO address parity */
395 #define PSYCHO_PCIDIAG_LPBACK 0x0000000000000001UL /* Enable loopback mode */
396
psycho_controller_hwinit(struct pci_pbm_info * pbm)397 static void psycho_controller_hwinit(struct pci_pbm_info *pbm)
398 {
399 u64 tmp;
400
401 upa_writeq(5, pbm->controller_regs + PSYCHO_IRQ_RETRY);
402
403 /* Enable arbiter for all PCI slots. */
404 tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIA_CTRL);
405 tmp |= PSYCHO_PCICTRL_AEN;
406 upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIA_CTRL);
407
408 tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIB_CTRL);
409 tmp |= PSYCHO_PCICTRL_AEN;
410 upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIB_CTRL);
411
412 /* Disable DMA write / PIO read synchronization on
413 * both PCI bus segments.
414 * [ U2P Erratum 1243770, STP2223BGA data sheet ]
415 */
416 tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIA_DIAG);
417 tmp |= PSYCHO_PCIDIAG_DDWSYNC;
418 upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIA_DIAG);
419
420 tmp = upa_readq(pbm->controller_regs + PSYCHO_PCIB_DIAG);
421 tmp |= PSYCHO_PCIDIAG_DDWSYNC;
422 upa_writeq(tmp, pbm->controller_regs + PSYCHO_PCIB_DIAG);
423 }
424
psycho_pbm_strbuf_init(struct pci_pbm_info * pbm,int is_pbm_a)425 static void psycho_pbm_strbuf_init(struct pci_pbm_info *pbm,
426 int is_pbm_a)
427 {
428 unsigned long base = pbm->controller_regs;
429 u64 control;
430
431 if (is_pbm_a) {
432 pbm->stc.strbuf_control = base + PSYCHO_STRBUF_CONTROL_A;
433 pbm->stc.strbuf_pflush = base + PSYCHO_STRBUF_FLUSH_A;
434 pbm->stc.strbuf_fsync = base + PSYCHO_STRBUF_FSYNC_A;
435 pbm->stc.strbuf_err_stat = base + PSYCHO_STC_ERR_A;
436 pbm->stc.strbuf_tag_diag = base + PSYCHO_STC_TAG_A;
437 pbm->stc.strbuf_line_diag= base + PSYCHO_STC_LINE_A;
438 } else {
439 pbm->stc.strbuf_control = base + PSYCHO_STRBUF_CONTROL_B;
440 pbm->stc.strbuf_pflush = base + PSYCHO_STRBUF_FLUSH_B;
441 pbm->stc.strbuf_fsync = base + PSYCHO_STRBUF_FSYNC_B;
442 pbm->stc.strbuf_err_stat = base + PSYCHO_STC_ERR_B;
443 pbm->stc.strbuf_tag_diag = base + PSYCHO_STC_TAG_B;
444 pbm->stc.strbuf_line_diag= base + PSYCHO_STC_LINE_B;
445 }
446 /* PSYCHO's streaming buffer lacks ctx flushing. */
447 pbm->stc.strbuf_ctxflush = 0;
448 pbm->stc.strbuf_ctxmatch_base = 0;
449
450 pbm->stc.strbuf_flushflag = (volatile unsigned long *)
451 ((((unsigned long)&pbm->stc.__flushflag_buf[0])
452 + 63UL)
453 & ~63UL);
454 pbm->stc.strbuf_flushflag_pa = (unsigned long)
455 __pa(pbm->stc.strbuf_flushflag);
456
457 /* Enable the streaming buffer. We have to be careful
458 * just in case OBP left it with LRU locking enabled.
459 *
460 * It is possible to control if PBM will be rerun on
461 * line misses. Currently I just retain whatever setting
462 * OBP left us with. All checks so far show it having
463 * a value of zero.
464 */
465 #undef PSYCHO_STRBUF_RERUN_ENABLE
466 #undef PSYCHO_STRBUF_RERUN_DISABLE
467 control = upa_readq(pbm->stc.strbuf_control);
468 control |= PSYCHO_STRBUF_CTRL_ENAB;
469 control &= ~(PSYCHO_STRBUF_CTRL_LENAB | PSYCHO_STRBUF_CTRL_LPTR);
470 #ifdef PSYCHO_STRBUF_RERUN_ENABLE
471 control &= ~(PSYCHO_STRBUF_CTRL_RRDIS);
472 #else
473 #ifdef PSYCHO_STRBUF_RERUN_DISABLE
474 control |= PSYCHO_STRBUF_CTRL_RRDIS;
475 #endif
476 #endif
477 upa_writeq(control, pbm->stc.strbuf_control);
478
479 pbm->stc.strbuf_enabled = 1;
480 }
481
482 #define PSYCHO_IOSPACE_A 0x002000000UL
483 #define PSYCHO_IOSPACE_B 0x002010000UL
484 #define PSYCHO_IOSPACE_SIZE 0x00000ffffUL
485 #define PSYCHO_MEMSPACE_A 0x100000000UL
486 #define PSYCHO_MEMSPACE_B 0x180000000UL
487 #define PSYCHO_MEMSPACE_SIZE 0x07fffffffUL
488
psycho_pbm_init(struct pci_pbm_info * pbm,struct platform_device * op,int is_pbm_a)489 static void psycho_pbm_init(struct pci_pbm_info *pbm,
490 struct platform_device *op, int is_pbm_a)
491 {
492 psycho_pbm_init_common(pbm, op, "PSYCHO", PBM_CHIP_TYPE_PSYCHO);
493 psycho_pbm_strbuf_init(pbm, is_pbm_a);
494 psycho_scan_bus(pbm, &op->dev);
495 }
496
psycho_find_sibling(u32 upa_portid)497 static struct pci_pbm_info *psycho_find_sibling(u32 upa_portid)
498 {
499 struct pci_pbm_info *pbm;
500
501 for (pbm = pci_pbm_root; pbm; pbm = pbm->next) {
502 if (pbm->portid == upa_portid)
503 return pbm;
504 }
505 return NULL;
506 }
507
508 #define PSYCHO_CONFIGSPACE 0x001000000UL
509
psycho_probe(struct platform_device * op)510 static int psycho_probe(struct platform_device *op)
511 {
512 const struct linux_prom64_registers *pr_regs;
513 struct device_node *dp = op->dev.of_node;
514 struct pci_pbm_info *pbm;
515 struct iommu *iommu;
516 int is_pbm_a, err;
517 u32 upa_portid;
518
519 upa_portid = of_getintprop_default(dp, "upa-portid", 0xff);
520
521 err = -ENOMEM;
522 pbm = kzalloc(sizeof(*pbm), GFP_KERNEL);
523 if (!pbm) {
524 printk(KERN_ERR PFX "Cannot allocate pci_pbm_info.\n");
525 goto out_err;
526 }
527
528 pbm->sibling = psycho_find_sibling(upa_portid);
529 if (pbm->sibling) {
530 iommu = pbm->sibling->iommu;
531 } else {
532 iommu = kzalloc(sizeof(struct iommu), GFP_KERNEL);
533 if (!iommu) {
534 printk(KERN_ERR PFX "Cannot allocate PBM iommu.\n");
535 goto out_free_controller;
536 }
537 }
538
539 pbm->iommu = iommu;
540 pbm->portid = upa_portid;
541
542 pr_regs = of_get_property(dp, "reg", NULL);
543 err = -ENODEV;
544 if (!pr_regs) {
545 printk(KERN_ERR PFX "No reg property.\n");
546 goto out_free_iommu;
547 }
548
549 is_pbm_a = ((pr_regs[0].phys_addr & 0x6000) == 0x2000);
550
551 pbm->controller_regs = pr_regs[2].phys_addr;
552 pbm->config_space = (pr_regs[2].phys_addr + PSYCHO_CONFIGSPACE);
553
554 if (is_pbm_a) {
555 pbm->pci_afsr = pbm->controller_regs + PSYCHO_PCI_AFSR_A;
556 pbm->pci_afar = pbm->controller_regs + PSYCHO_PCI_AFAR_A;
557 pbm->pci_csr = pbm->controller_regs + PSYCHO_PCIA_CTRL;
558 } else {
559 pbm->pci_afsr = pbm->controller_regs + PSYCHO_PCI_AFSR_B;
560 pbm->pci_afar = pbm->controller_regs + PSYCHO_PCI_AFAR_B;
561 pbm->pci_csr = pbm->controller_regs + PSYCHO_PCIB_CTRL;
562 }
563
564 psycho_controller_hwinit(pbm);
565 if (!pbm->sibling) {
566 err = psycho_iommu_init(pbm, 128, 0xc0000000,
567 0xffffffff, PSYCHO_CONTROL);
568 if (err)
569 goto out_free_iommu;
570
571 /* If necessary, hook us up for starfire IRQ translations. */
572 if (this_is_starfire)
573 starfire_hookup(pbm->portid);
574 }
575
576 psycho_pbm_init(pbm, op, is_pbm_a);
577
578 pbm->next = pci_pbm_root;
579 pci_pbm_root = pbm;
580
581 if (pbm->sibling)
582 pbm->sibling->sibling = pbm;
583
584 dev_set_drvdata(&op->dev, pbm);
585
586 return 0;
587
588 out_free_iommu:
589 if (!pbm->sibling)
590 kfree(pbm->iommu);
591
592 out_free_controller:
593 kfree(pbm);
594
595 out_err:
596 return err;
597 }
598
599 static const struct of_device_id psycho_match[] = {
600 {
601 .name = "pci",
602 .compatible = "pci108e,8000",
603 },
604 {},
605 };
606
607 static struct platform_driver psycho_driver = {
608 .driver = {
609 .name = DRIVER_NAME,
610 .of_match_table = psycho_match,
611 },
612 .probe = psycho_probe,
613 };
614
psycho_init(void)615 static int __init psycho_init(void)
616 {
617 return platform_driver_register(&psycho_driver);
618 }
619
620 subsys_initcall(psycho_init);
621