Commit | Line | Data |
---|---|---|
184cd4a3 BH |
1 | /* |
2 | * Support PCI/PCIe on PowerNV platforms | |
3 | * | |
4 | * Copyright 2011 Benjamin Herrenschmidt, IBM Corp. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version | |
9 | * 2 of the License, or (at your option) any later version. | |
10 | */ | |
11 | ||
cee72d5b | 12 | #undef DEBUG |
184cd4a3 BH |
13 | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/pci.h> | |
361f2a2a | 16 | #include <linux/crash_dump.h> |
37c367f2 | 17 | #include <linux/debugfs.h> |
184cd4a3 BH |
18 | #include <linux/delay.h> |
19 | #include <linux/string.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/bootmem.h> | |
22 | #include <linux/irq.h> | |
23 | #include <linux/io.h> | |
24 | #include <linux/msi.h> | |
cd15b048 | 25 | #include <linux/memblock.h> |
184cd4a3 BH |
26 | |
27 | #include <asm/sections.h> | |
28 | #include <asm/io.h> | |
29 | #include <asm/prom.h> | |
30 | #include <asm/pci-bridge.h> | |
31 | #include <asm/machdep.h> | |
fb1b55d6 | 32 | #include <asm/msi_bitmap.h> |
184cd4a3 BH |
33 | #include <asm/ppc-pci.h> |
34 | #include <asm/opal.h> | |
35 | #include <asm/iommu.h> | |
36 | #include <asm/tce.h> | |
137436c9 | 37 | #include <asm/xics.h> |
37c367f2 | 38 | #include <asm/debug.h> |
184cd4a3 BH |
39 | |
40 | #include "powernv.h" | |
41 | #include "pci.h" | |
42 | ||
184cd4a3 BH |
43 | #define define_pe_printk_level(func, kern_level) \ |
44 | static int func(const struct pnv_ioda_pe *pe, const char *fmt, ...) \ | |
45 | { \ | |
46 | struct va_format vaf; \ | |
47 | va_list args; \ | |
490e078d | 48 | char pfix[32]; \ |
184cd4a3 BH |
49 | int r; \ |
50 | \ | |
51 | va_start(args, fmt); \ | |
52 | \ | |
53 | vaf.fmt = fmt; \ | |
54 | vaf.va = &args; \ | |
55 | \ | |
490e078d GS |
56 | if (pe->pdev) \ |
57 | strlcpy(pfix, dev_name(&pe->pdev->dev), \ | |
58 | sizeof(pfix)); \ | |
59 | else \ | |
60 | sprintf(pfix, "%04x:%02x ", \ | |
61 | pci_domain_nr(pe->pbus), \ | |
62 | pe->pbus->number); \ | |
63 | r = printk(kern_level "pci %s: [PE# %.3d] %pV", \ | |
64 | pfix, pe->pe_number, &vaf); \ | |
65 | \ | |
184cd4a3 BH |
66 | va_end(args); \ |
67 | \ | |
68 | return r; \ | |
69 | } \ | |
70 | ||
71 | define_pe_printk_level(pe_err, KERN_ERR); | |
72 | define_pe_printk_level(pe_warn, KERN_WARNING); | |
73 | define_pe_printk_level(pe_info, KERN_INFO); | |
74 | ||
8e0a1611 AK |
75 | /* |
76 | * stdcix is only supposed to be used in hypervisor real mode as per | |
77 | * the architecture spec | |
78 | */ | |
79 | static inline void __raw_rm_writeq(u64 val, volatile void __iomem *paddr) | |
80 | { | |
81 | __asm__ __volatile__("stdcix %0,0,%1" | |
82 | : : "r" (val), "r" (paddr) : "memory"); | |
83 | } | |
84 | ||
cad5cef6 | 85 | static int pnv_ioda_alloc_pe(struct pnv_phb *phb) |
184cd4a3 BH |
86 | { |
87 | unsigned long pe; | |
88 | ||
89 | do { | |
90 | pe = find_next_zero_bit(phb->ioda.pe_alloc, | |
91 | phb->ioda.total_pe, 0); | |
92 | if (pe >= phb->ioda.total_pe) | |
93 | return IODA_INVALID_PE; | |
94 | } while(test_and_set_bit(pe, phb->ioda.pe_alloc)); | |
95 | ||
4cce9550 | 96 | phb->ioda.pe_array[pe].phb = phb; |
184cd4a3 BH |
97 | phb->ioda.pe_array[pe].pe_number = pe; |
98 | return pe; | |
99 | } | |
100 | ||
cad5cef6 | 101 | static void pnv_ioda_free_pe(struct pnv_phb *phb, int pe) |
184cd4a3 BH |
102 | { |
103 | WARN_ON(phb->ioda.pe_array[pe].pdev); | |
104 | ||
105 | memset(&phb->ioda.pe_array[pe], 0, sizeof(struct pnv_ioda_pe)); | |
106 | clear_bit(pe, phb->ioda.pe_alloc); | |
107 | } | |
108 | ||
109 | /* Currently those 2 are only used when MSIs are enabled, this will change | |
110 | * but in the meantime, we need to protect them to avoid warnings | |
111 | */ | |
112 | #ifdef CONFIG_PCI_MSI | |
cad5cef6 | 113 | static struct pnv_ioda_pe *pnv_ioda_get_pe(struct pci_dev *dev) |
184cd4a3 BH |
114 | { |
115 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
116 | struct pnv_phb *phb = hose->private_data; | |
b72c1f65 | 117 | struct pci_dn *pdn = pci_get_pdn(dev); |
184cd4a3 BH |
118 | |
119 | if (!pdn) | |
120 | return NULL; | |
121 | if (pdn->pe_number == IODA_INVALID_PE) | |
122 | return NULL; | |
123 | return &phb->ioda.pe_array[pdn->pe_number]; | |
124 | } | |
184cd4a3 BH |
125 | #endif /* CONFIG_PCI_MSI */ |
126 | ||
cad5cef6 | 127 | static int pnv_ioda_configure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe) |
184cd4a3 BH |
128 | { |
129 | struct pci_dev *parent; | |
130 | uint8_t bcomp, dcomp, fcomp; | |
131 | long rc, rid_end, rid; | |
132 | ||
133 | /* Bus validation ? */ | |
134 | if (pe->pbus) { | |
135 | int count; | |
136 | ||
137 | dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER; | |
138 | fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER; | |
139 | parent = pe->pbus->self; | |
fb446ad0 GS |
140 | if (pe->flags & PNV_IODA_PE_BUS_ALL) |
141 | count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1; | |
142 | else | |
143 | count = 1; | |
144 | ||
184cd4a3 BH |
145 | switch(count) { |
146 | case 1: bcomp = OpalPciBusAll; break; | |
147 | case 2: bcomp = OpalPciBus7Bits; break; | |
148 | case 4: bcomp = OpalPciBus6Bits; break; | |
149 | case 8: bcomp = OpalPciBus5Bits; break; | |
150 | case 16: bcomp = OpalPciBus4Bits; break; | |
151 | case 32: bcomp = OpalPciBus3Bits; break; | |
152 | default: | |
153 | pr_err("%s: Number of subordinate busses %d" | |
154 | " unsupported\n", | |
155 | pci_name(pe->pbus->self), count); | |
156 | /* Do an exact match only */ | |
157 | bcomp = OpalPciBusAll; | |
158 | } | |
159 | rid_end = pe->rid + (count << 8); | |
160 | } else { | |
161 | parent = pe->pdev->bus->self; | |
162 | bcomp = OpalPciBusAll; | |
163 | dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER; | |
164 | fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER; | |
165 | rid_end = pe->rid + 1; | |
166 | } | |
167 | ||
631ad691 GS |
168 | /* |
169 | * Associate PE in PELT. We need add the PE into the | |
170 | * corresponding PELT-V as well. Otherwise, the error | |
171 | * originated from the PE might contribute to other | |
172 | * PEs. | |
173 | */ | |
184cd4a3 BH |
174 | rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid, |
175 | bcomp, dcomp, fcomp, OPAL_MAP_PE); | |
176 | if (rc) { | |
177 | pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc); | |
178 | return -ENXIO; | |
179 | } | |
631ad691 GS |
180 | |
181 | rc = opal_pci_set_peltv(phb->opal_id, pe->pe_number, | |
182 | pe->pe_number, OPAL_ADD_PE_TO_DOMAIN); | |
183 | if (rc) | |
184 | pe_warn(pe, "OPAL error %d adding self to PELTV\n", rc); | |
184cd4a3 BH |
185 | opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number, |
186 | OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); | |
187 | ||
188 | /* Add to all parents PELT-V */ | |
189 | while (parent) { | |
b72c1f65 | 190 | struct pci_dn *pdn = pci_get_pdn(parent); |
184cd4a3 BH |
191 | if (pdn && pdn->pe_number != IODA_INVALID_PE) { |
192 | rc = opal_pci_set_peltv(phb->opal_id, pdn->pe_number, | |
cee72d5b | 193 | pe->pe_number, OPAL_ADD_PE_TO_DOMAIN); |
184cd4a3 BH |
194 | /* XXX What to do in case of error ? */ |
195 | } | |
196 | parent = parent->bus->self; | |
197 | } | |
198 | /* Setup reverse map */ | |
199 | for (rid = pe->rid; rid < rid_end; rid++) | |
200 | phb->ioda.pe_rmap[rid] = pe->pe_number; | |
201 | ||
202 | /* Setup one MVTs on IODA1 */ | |
203 | if (phb->type == PNV_PHB_IODA1) { | |
204 | pe->mve_number = pe->pe_number; | |
205 | rc = opal_pci_set_mve(phb->opal_id, pe->mve_number, | |
206 | pe->pe_number); | |
207 | if (rc) { | |
208 | pe_err(pe, "OPAL error %ld setting up MVE %d\n", | |
209 | rc, pe->mve_number); | |
210 | pe->mve_number = -1; | |
211 | } else { | |
212 | rc = opal_pci_set_mve_enable(phb->opal_id, | |
cee72d5b | 213 | pe->mve_number, OPAL_ENABLE_MVE); |
184cd4a3 BH |
214 | if (rc) { |
215 | pe_err(pe, "OPAL error %ld enabling MVE %d\n", | |
216 | rc, pe->mve_number); | |
217 | pe->mve_number = -1; | |
218 | } | |
219 | } | |
220 | } else if (phb->type == PNV_PHB_IODA2) | |
221 | pe->mve_number = 0; | |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
cad5cef6 GKH |
226 | static void pnv_ioda_link_pe_by_weight(struct pnv_phb *phb, |
227 | struct pnv_ioda_pe *pe) | |
184cd4a3 BH |
228 | { |
229 | struct pnv_ioda_pe *lpe; | |
230 | ||
7ebdf956 | 231 | list_for_each_entry(lpe, &phb->ioda.pe_dma_list, dma_link) { |
184cd4a3 | 232 | if (lpe->dma_weight < pe->dma_weight) { |
7ebdf956 | 233 | list_add_tail(&pe->dma_link, &lpe->dma_link); |
184cd4a3 BH |
234 | return; |
235 | } | |
236 | } | |
7ebdf956 | 237 | list_add_tail(&pe->dma_link, &phb->ioda.pe_dma_list); |
184cd4a3 BH |
238 | } |
239 | ||
240 | static unsigned int pnv_ioda_dma_weight(struct pci_dev *dev) | |
241 | { | |
242 | /* This is quite simplistic. The "base" weight of a device | |
243 | * is 10. 0 means no DMA is to be accounted for it. | |
244 | */ | |
245 | ||
246 | /* If it's a bridge, no DMA */ | |
247 | if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL) | |
248 | return 0; | |
249 | ||
250 | /* Reduce the weight of slow USB controllers */ | |
251 | if (dev->class == PCI_CLASS_SERIAL_USB_UHCI || | |
252 | dev->class == PCI_CLASS_SERIAL_USB_OHCI || | |
253 | dev->class == PCI_CLASS_SERIAL_USB_EHCI) | |
254 | return 3; | |
255 | ||
256 | /* Increase the weight of RAID (includes Obsidian) */ | |
257 | if ((dev->class >> 8) == PCI_CLASS_STORAGE_RAID) | |
258 | return 15; | |
259 | ||
260 | /* Default */ | |
261 | return 10; | |
262 | } | |
263 | ||
fb446ad0 | 264 | #if 0 |
cad5cef6 | 265 | static struct pnv_ioda_pe *pnv_ioda_setup_dev_PE(struct pci_dev *dev) |
184cd4a3 BH |
266 | { |
267 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
268 | struct pnv_phb *phb = hose->private_data; | |
b72c1f65 | 269 | struct pci_dn *pdn = pci_get_pdn(dev); |
184cd4a3 BH |
270 | struct pnv_ioda_pe *pe; |
271 | int pe_num; | |
272 | ||
273 | if (!pdn) { | |
274 | pr_err("%s: Device tree node not associated properly\n", | |
275 | pci_name(dev)); | |
276 | return NULL; | |
277 | } | |
278 | if (pdn->pe_number != IODA_INVALID_PE) | |
279 | return NULL; | |
280 | ||
281 | /* PE#0 has been pre-set */ | |
282 | if (dev->bus->number == 0) | |
283 | pe_num = 0; | |
284 | else | |
285 | pe_num = pnv_ioda_alloc_pe(phb); | |
286 | if (pe_num == IODA_INVALID_PE) { | |
287 | pr_warning("%s: Not enough PE# available, disabling device\n", | |
288 | pci_name(dev)); | |
289 | return NULL; | |
290 | } | |
291 | ||
292 | /* NOTE: We get only one ref to the pci_dev for the pdn, not for the | |
293 | * pointer in the PE data structure, both should be destroyed at the | |
294 | * same time. However, this needs to be looked at more closely again | |
295 | * once we actually start removing things (Hotplug, SR-IOV, ...) | |
296 | * | |
297 | * At some point we want to remove the PDN completely anyways | |
298 | */ | |
299 | pe = &phb->ioda.pe_array[pe_num]; | |
300 | pci_dev_get(dev); | |
301 | pdn->pcidev = dev; | |
302 | pdn->pe_number = pe_num; | |
303 | pe->pdev = dev; | |
304 | pe->pbus = NULL; | |
305 | pe->tce32_seg = -1; | |
306 | pe->mve_number = -1; | |
307 | pe->rid = dev->bus->number << 8 | pdn->devfn; | |
308 | ||
309 | pe_info(pe, "Associated device to PE\n"); | |
310 | ||
311 | if (pnv_ioda_configure_pe(phb, pe)) { | |
312 | /* XXX What do we do here ? */ | |
313 | if (pe_num) | |
314 | pnv_ioda_free_pe(phb, pe_num); | |
315 | pdn->pe_number = IODA_INVALID_PE; | |
316 | pe->pdev = NULL; | |
317 | pci_dev_put(dev); | |
318 | return NULL; | |
319 | } | |
320 | ||
321 | /* Assign a DMA weight to the device */ | |
322 | pe->dma_weight = pnv_ioda_dma_weight(dev); | |
323 | if (pe->dma_weight != 0) { | |
324 | phb->ioda.dma_weight += pe->dma_weight; | |
325 | phb->ioda.dma_pe_count++; | |
326 | } | |
327 | ||
328 | /* Link the PE */ | |
329 | pnv_ioda_link_pe_by_weight(phb, pe); | |
330 | ||
331 | return pe; | |
332 | } | |
fb446ad0 | 333 | #endif /* Useful for SRIOV case */ |
184cd4a3 BH |
334 | |
335 | static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe) | |
336 | { | |
337 | struct pci_dev *dev; | |
338 | ||
339 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
b72c1f65 | 340 | struct pci_dn *pdn = pci_get_pdn(dev); |
184cd4a3 BH |
341 | |
342 | if (pdn == NULL) { | |
343 | pr_warn("%s: No device node associated with device !\n", | |
344 | pci_name(dev)); | |
345 | continue; | |
346 | } | |
184cd4a3 BH |
347 | pdn->pcidev = dev; |
348 | pdn->pe_number = pe->pe_number; | |
349 | pe->dma_weight += pnv_ioda_dma_weight(dev); | |
fb446ad0 | 350 | if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate) |
184cd4a3 BH |
351 | pnv_ioda_setup_same_PE(dev->subordinate, pe); |
352 | } | |
353 | } | |
354 | ||
fb446ad0 GS |
355 | /* |
356 | * There're 2 types of PCI bus sensitive PEs: One that is compromised of | |
357 | * single PCI bus. Another one that contains the primary PCI bus and its | |
358 | * subordinate PCI devices and buses. The second type of PE is normally | |
359 | * orgiriated by PCIe-to-PCI bridge or PLX switch downstream ports. | |
360 | */ | |
cad5cef6 | 361 | static void pnv_ioda_setup_bus_PE(struct pci_bus *bus, int all) |
184cd4a3 | 362 | { |
fb446ad0 | 363 | struct pci_controller *hose = pci_bus_to_host(bus); |
184cd4a3 | 364 | struct pnv_phb *phb = hose->private_data; |
184cd4a3 BH |
365 | struct pnv_ioda_pe *pe; |
366 | int pe_num; | |
367 | ||
184cd4a3 BH |
368 | pe_num = pnv_ioda_alloc_pe(phb); |
369 | if (pe_num == IODA_INVALID_PE) { | |
fb446ad0 GS |
370 | pr_warning("%s: Not enough PE# available for PCI bus %04x:%02x\n", |
371 | __func__, pci_domain_nr(bus), bus->number); | |
184cd4a3 BH |
372 | return; |
373 | } | |
374 | ||
375 | pe = &phb->ioda.pe_array[pe_num]; | |
fb446ad0 | 376 | pe->flags = (all ? PNV_IODA_PE_BUS_ALL : PNV_IODA_PE_BUS); |
184cd4a3 BH |
377 | pe->pbus = bus; |
378 | pe->pdev = NULL; | |
379 | pe->tce32_seg = -1; | |
380 | pe->mve_number = -1; | |
b918c62e | 381 | pe->rid = bus->busn_res.start << 8; |
184cd4a3 BH |
382 | pe->dma_weight = 0; |
383 | ||
fb446ad0 GS |
384 | if (all) |
385 | pe_info(pe, "Secondary bus %d..%d associated with PE#%d\n", | |
386 | bus->busn_res.start, bus->busn_res.end, pe_num); | |
387 | else | |
388 | pe_info(pe, "Secondary bus %d associated with PE#%d\n", | |
389 | bus->busn_res.start, pe_num); | |
184cd4a3 BH |
390 | |
391 | if (pnv_ioda_configure_pe(phb, pe)) { | |
392 | /* XXX What do we do here ? */ | |
393 | if (pe_num) | |
394 | pnv_ioda_free_pe(phb, pe_num); | |
395 | pe->pbus = NULL; | |
396 | return; | |
397 | } | |
398 | ||
399 | /* Associate it with all child devices */ | |
400 | pnv_ioda_setup_same_PE(bus, pe); | |
401 | ||
7ebdf956 GS |
402 | /* Put PE to the list */ |
403 | list_add_tail(&pe->list, &phb->ioda.pe_list); | |
404 | ||
184cd4a3 BH |
405 | /* Account for one DMA PE if at least one DMA capable device exist |
406 | * below the bridge | |
407 | */ | |
408 | if (pe->dma_weight != 0) { | |
409 | phb->ioda.dma_weight += pe->dma_weight; | |
410 | phb->ioda.dma_pe_count++; | |
411 | } | |
412 | ||
413 | /* Link the PE */ | |
414 | pnv_ioda_link_pe_by_weight(phb, pe); | |
415 | } | |
416 | ||
cad5cef6 | 417 | static void pnv_ioda_setup_PEs(struct pci_bus *bus) |
184cd4a3 BH |
418 | { |
419 | struct pci_dev *dev; | |
fb446ad0 GS |
420 | |
421 | pnv_ioda_setup_bus_PE(bus, 0); | |
184cd4a3 BH |
422 | |
423 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
fb446ad0 GS |
424 | if (dev->subordinate) { |
425 | if (pci_pcie_type(dev) == PCI_EXP_TYPE_PCI_BRIDGE) | |
426 | pnv_ioda_setup_bus_PE(dev->subordinate, 1); | |
427 | else | |
428 | pnv_ioda_setup_PEs(dev->subordinate); | |
429 | } | |
430 | } | |
431 | } | |
432 | ||
433 | /* | |
434 | * Configure PEs so that the downstream PCI buses and devices | |
435 | * could have their associated PE#. Unfortunately, we didn't | |
436 | * figure out the way to identify the PLX bridge yet. So we | |
437 | * simply put the PCI bus and the subordinate behind the root | |
438 | * port to PE# here. The game rule here is expected to be changed | |
439 | * as soon as we can detected PLX bridge correctly. | |
440 | */ | |
cad5cef6 | 441 | static void pnv_pci_ioda_setup_PEs(void) |
fb446ad0 GS |
442 | { |
443 | struct pci_controller *hose, *tmp; | |
444 | ||
445 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { | |
446 | pnv_ioda_setup_PEs(hose->bus); | |
184cd4a3 BH |
447 | } |
448 | } | |
449 | ||
959c9bdd | 450 | static void pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, struct pci_dev *pdev) |
184cd4a3 | 451 | { |
b72c1f65 | 452 | struct pci_dn *pdn = pci_get_pdn(pdev); |
959c9bdd | 453 | struct pnv_ioda_pe *pe; |
184cd4a3 | 454 | |
959c9bdd GS |
455 | /* |
456 | * The function can be called while the PE# | |
457 | * hasn't been assigned. Do nothing for the | |
458 | * case. | |
459 | */ | |
460 | if (!pdn || pdn->pe_number == IODA_INVALID_PE) | |
461 | return; | |
184cd4a3 | 462 | |
959c9bdd | 463 | pe = &phb->ioda.pe_array[pdn->pe_number]; |
cd15b048 | 464 | WARN_ON(get_dma_ops(&pdev->dev) != &dma_iommu_ops); |
3f28c5af | 465 | set_iommu_table_base(&pdev->dev, &pe->tce32_table); |
184cd4a3 BH |
466 | } |
467 | ||
cd15b048 BH |
468 | static int pnv_pci_ioda_dma_set_mask(struct pnv_phb *phb, |
469 | struct pci_dev *pdev, u64 dma_mask) | |
470 | { | |
471 | struct pci_dn *pdn = pci_get_pdn(pdev); | |
472 | struct pnv_ioda_pe *pe; | |
473 | uint64_t top; | |
474 | bool bypass = false; | |
475 | ||
476 | if (WARN_ON(!pdn || pdn->pe_number == IODA_INVALID_PE)) | |
477 | return -ENODEV;; | |
478 | ||
479 | pe = &phb->ioda.pe_array[pdn->pe_number]; | |
480 | if (pe->tce_bypass_enabled) { | |
481 | top = pe->tce_bypass_base + memblock_end_of_DRAM() - 1; | |
482 | bypass = (dma_mask >= top); | |
483 | } | |
484 | ||
485 | if (bypass) { | |
486 | dev_info(&pdev->dev, "Using 64-bit DMA iommu bypass\n"); | |
487 | set_dma_ops(&pdev->dev, &dma_direct_ops); | |
488 | set_dma_offset(&pdev->dev, pe->tce_bypass_base); | |
489 | } else { | |
490 | dev_info(&pdev->dev, "Using 32-bit DMA via iommu\n"); | |
491 | set_dma_ops(&pdev->dev, &dma_iommu_ops); | |
492 | set_iommu_table_base(&pdev->dev, &pe->tce32_table); | |
493 | } | |
494 | return 0; | |
495 | } | |
496 | ||
74251fe2 BH |
497 | static void pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe, struct pci_bus *bus) |
498 | { | |
499 | struct pci_dev *dev; | |
500 | ||
501 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
d905c5df | 502 | set_iommu_table_base_and_group(&dev->dev, &pe->tce32_table); |
74251fe2 BH |
503 | if (dev->subordinate) |
504 | pnv_ioda_setup_bus_dma(pe, dev->subordinate); | |
505 | } | |
506 | } | |
507 | ||
8e0a1611 AK |
508 | static void pnv_pci_ioda1_tce_invalidate(struct pnv_ioda_pe *pe, |
509 | struct iommu_table *tbl, | |
3ad26e5c | 510 | __be64 *startp, __be64 *endp, bool rm) |
4cce9550 | 511 | { |
3ad26e5c BH |
512 | __be64 __iomem *invalidate = rm ? |
513 | (__be64 __iomem *)pe->tce_inval_reg_phys : | |
514 | (__be64 __iomem *)tbl->it_index; | |
4cce9550 | 515 | unsigned long start, end, inc; |
b0376c9b | 516 | const unsigned shift = tbl->it_page_shift; |
4cce9550 GS |
517 | |
518 | start = __pa(startp); | |
519 | end = __pa(endp); | |
520 | ||
521 | /* BML uses this case for p6/p7/galaxy2: Shift addr and put in node */ | |
522 | if (tbl->it_busno) { | |
b0376c9b AK |
523 | start <<= shift; |
524 | end <<= shift; | |
525 | inc = 128ull << shift; | |
4cce9550 GS |
526 | start |= tbl->it_busno; |
527 | end |= tbl->it_busno; | |
528 | } else if (tbl->it_type & TCE_PCI_SWINV_PAIR) { | |
529 | /* p7ioc-style invalidation, 2 TCEs per write */ | |
530 | start |= (1ull << 63); | |
531 | end |= (1ull << 63); | |
532 | inc = 16; | |
533 | } else { | |
534 | /* Default (older HW) */ | |
535 | inc = 128; | |
536 | } | |
537 | ||
538 | end |= inc - 1; /* round up end to be different than start */ | |
539 | ||
540 | mb(); /* Ensure above stores are visible */ | |
541 | while (start <= end) { | |
8e0a1611 | 542 | if (rm) |
3ad26e5c | 543 | __raw_rm_writeq(cpu_to_be64(start), invalidate); |
8e0a1611 | 544 | else |
3ad26e5c | 545 | __raw_writeq(cpu_to_be64(start), invalidate); |
4cce9550 GS |
546 | start += inc; |
547 | } | |
548 | ||
549 | /* | |
550 | * The iommu layer will do another mb() for us on build() | |
551 | * and we don't care on free() | |
552 | */ | |
553 | } | |
554 | ||
555 | static void pnv_pci_ioda2_tce_invalidate(struct pnv_ioda_pe *pe, | |
556 | struct iommu_table *tbl, | |
3ad26e5c | 557 | __be64 *startp, __be64 *endp, bool rm) |
4cce9550 GS |
558 | { |
559 | unsigned long start, end, inc; | |
3ad26e5c BH |
560 | __be64 __iomem *invalidate = rm ? |
561 | (__be64 __iomem *)pe->tce_inval_reg_phys : | |
562 | (__be64 __iomem *)tbl->it_index; | |
b0376c9b | 563 | const unsigned shift = tbl->it_page_shift; |
4cce9550 GS |
564 | |
565 | /* We'll invalidate DMA address in PE scope */ | |
b0376c9b | 566 | start = 0x2ull << 60; |
4cce9550 GS |
567 | start |= (pe->pe_number & 0xFF); |
568 | end = start; | |
569 | ||
570 | /* Figure out the start, end and step */ | |
571 | inc = tbl->it_offset + (((u64)startp - tbl->it_base) / sizeof(u64)); | |
b0376c9b | 572 | start |= (inc << shift); |
4cce9550 | 573 | inc = tbl->it_offset + (((u64)endp - tbl->it_base) / sizeof(u64)); |
b0376c9b AK |
574 | end |= (inc << shift); |
575 | inc = (0x1ull << shift); | |
4cce9550 GS |
576 | mb(); |
577 | ||
578 | while (start <= end) { | |
8e0a1611 | 579 | if (rm) |
3ad26e5c | 580 | __raw_rm_writeq(cpu_to_be64(start), invalidate); |
8e0a1611 | 581 | else |
3ad26e5c | 582 | __raw_writeq(cpu_to_be64(start), invalidate); |
4cce9550 GS |
583 | start += inc; |
584 | } | |
585 | } | |
586 | ||
587 | void pnv_pci_ioda_tce_invalidate(struct iommu_table *tbl, | |
3ad26e5c | 588 | __be64 *startp, __be64 *endp, bool rm) |
4cce9550 GS |
589 | { |
590 | struct pnv_ioda_pe *pe = container_of(tbl, struct pnv_ioda_pe, | |
591 | tce32_table); | |
592 | struct pnv_phb *phb = pe->phb; | |
593 | ||
594 | if (phb->type == PNV_PHB_IODA1) | |
8e0a1611 | 595 | pnv_pci_ioda1_tce_invalidate(pe, tbl, startp, endp, rm); |
4cce9550 | 596 | else |
8e0a1611 | 597 | pnv_pci_ioda2_tce_invalidate(pe, tbl, startp, endp, rm); |
4cce9550 GS |
598 | } |
599 | ||
cad5cef6 GKH |
600 | static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb, |
601 | struct pnv_ioda_pe *pe, unsigned int base, | |
602 | unsigned int segs) | |
184cd4a3 BH |
603 | { |
604 | ||
605 | struct page *tce_mem = NULL; | |
606 | const __be64 *swinvp; | |
607 | struct iommu_table *tbl; | |
608 | unsigned int i; | |
609 | int64_t rc; | |
610 | void *addr; | |
611 | ||
612 | /* 256M DMA window, 4K TCE pages, 8 bytes TCE */ | |
613 | #define TCE32_TABLE_SIZE ((0x10000000 / 0x1000) * 8) | |
614 | ||
615 | /* XXX FIXME: Handle 64-bit only DMA devices */ | |
616 | /* XXX FIXME: Provide 64-bit DMA facilities & non-4K TCE tables etc.. */ | |
617 | /* XXX FIXME: Allocate multi-level tables on PHB3 */ | |
618 | ||
619 | /* We shouldn't already have a 32-bit DMA associated */ | |
620 | if (WARN_ON(pe->tce32_seg >= 0)) | |
621 | return; | |
622 | ||
623 | /* Grab a 32-bit TCE table */ | |
624 | pe->tce32_seg = base; | |
625 | pe_info(pe, " Setting up 32-bit TCE table at %08x..%08x\n", | |
626 | (base << 28), ((base + segs) << 28) - 1); | |
627 | ||
628 | /* XXX Currently, we allocate one big contiguous table for the | |
629 | * TCEs. We only really need one chunk per 256M of TCE space | |
630 | * (ie per segment) but that's an optimization for later, it | |
631 | * requires some added smarts with our get/put_tce implementation | |
632 | */ | |
633 | tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL, | |
634 | get_order(TCE32_TABLE_SIZE * segs)); | |
635 | if (!tce_mem) { | |
636 | pe_err(pe, " Failed to allocate a 32-bit TCE memory\n"); | |
637 | goto fail; | |
638 | } | |
639 | addr = page_address(tce_mem); | |
640 | memset(addr, 0, TCE32_TABLE_SIZE * segs); | |
641 | ||
642 | /* Configure HW */ | |
643 | for (i = 0; i < segs; i++) { | |
644 | rc = opal_pci_map_pe_dma_window(phb->opal_id, | |
645 | pe->pe_number, | |
646 | base + i, 1, | |
647 | __pa(addr) + TCE32_TABLE_SIZE * i, | |
648 | TCE32_TABLE_SIZE, 0x1000); | |
649 | if (rc) { | |
650 | pe_err(pe, " Failed to configure 32-bit TCE table," | |
651 | " err %ld\n", rc); | |
652 | goto fail; | |
653 | } | |
654 | } | |
655 | ||
656 | /* Setup linux iommu table */ | |
657 | tbl = &pe->tce32_table; | |
658 | pnv_pci_setup_iommu_table(tbl, addr, TCE32_TABLE_SIZE * segs, | |
659 | base << 28); | |
660 | ||
661 | /* OPAL variant of P7IOC SW invalidated TCEs */ | |
662 | swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL); | |
663 | if (swinvp) { | |
664 | /* We need a couple more fields -- an address and a data | |
665 | * to or. Since the bus is only printed out on table free | |
666 | * errors, and on the first pass the data will be a relative | |
667 | * bus number, print that out instead. | |
668 | */ | |
8e0a1611 AK |
669 | pe->tce_inval_reg_phys = be64_to_cpup(swinvp); |
670 | tbl->it_index = (unsigned long)ioremap(pe->tce_inval_reg_phys, | |
671 | 8); | |
65fd766b GS |
672 | tbl->it_type |= (TCE_PCI_SWINV_CREATE | |
673 | TCE_PCI_SWINV_FREE | | |
674 | TCE_PCI_SWINV_PAIR); | |
184cd4a3 BH |
675 | } |
676 | iommu_init_table(tbl, phb->hose->node); | |
e9bc03fe | 677 | iommu_register_group(tbl, phb->hose->global_number, pe->pe_number); |
184cd4a3 | 678 | |
74251fe2 | 679 | if (pe->pdev) |
d905c5df | 680 | set_iommu_table_base_and_group(&pe->pdev->dev, tbl); |
74251fe2 BH |
681 | else |
682 | pnv_ioda_setup_bus_dma(pe, pe->pbus); | |
683 | ||
184cd4a3 BH |
684 | return; |
685 | fail: | |
686 | /* XXX Failure: Try to fallback to 64-bit only ? */ | |
687 | if (pe->tce32_seg >= 0) | |
688 | pe->tce32_seg = -1; | |
689 | if (tce_mem) | |
690 | __free_pages(tce_mem, get_order(TCE32_TABLE_SIZE * segs)); | |
691 | } | |
692 | ||
cd15b048 BH |
693 | static void pnv_pci_ioda2_set_bypass(struct iommu_table *tbl, bool enable) |
694 | { | |
695 | struct pnv_ioda_pe *pe = container_of(tbl, struct pnv_ioda_pe, | |
696 | tce32_table); | |
697 | uint16_t window_id = (pe->pe_number << 1 ) + 1; | |
698 | int64_t rc; | |
699 | ||
700 | pe_info(pe, "%sabling 64-bit DMA bypass\n", enable ? "En" : "Dis"); | |
701 | if (enable) { | |
702 | phys_addr_t top = memblock_end_of_DRAM(); | |
703 | ||
704 | top = roundup_pow_of_two(top); | |
705 | rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, | |
706 | pe->pe_number, | |
707 | window_id, | |
708 | pe->tce_bypass_base, | |
709 | top); | |
710 | } else { | |
711 | rc = opal_pci_map_pe_dma_window_real(pe->phb->opal_id, | |
712 | pe->pe_number, | |
713 | window_id, | |
714 | pe->tce_bypass_base, | |
715 | 0); | |
716 | ||
717 | /* | |
718 | * We might want to reset the DMA ops of all devices on | |
719 | * this PE. However in theory, that shouldn't be necessary | |
720 | * as this is used for VFIO/KVM pass-through and the device | |
721 | * hasn't yet been returned to its kernel driver | |
722 | */ | |
723 | } | |
724 | if (rc) | |
725 | pe_err(pe, "OPAL error %lld configuring bypass window\n", rc); | |
726 | else | |
727 | pe->tce_bypass_enabled = enable; | |
728 | } | |
729 | ||
730 | static void pnv_pci_ioda2_setup_bypass_pe(struct pnv_phb *phb, | |
731 | struct pnv_ioda_pe *pe) | |
732 | { | |
733 | /* TVE #1 is selected by PCI address bit 59 */ | |
734 | pe->tce_bypass_base = 1ull << 59; | |
735 | ||
736 | /* Install set_bypass callback for VFIO */ | |
737 | pe->tce32_table.set_bypass = pnv_pci_ioda2_set_bypass; | |
738 | ||
739 | /* Enable bypass by default */ | |
740 | pnv_pci_ioda2_set_bypass(&pe->tce32_table, true); | |
741 | } | |
742 | ||
373f5657 GS |
743 | static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, |
744 | struct pnv_ioda_pe *pe) | |
745 | { | |
746 | struct page *tce_mem = NULL; | |
747 | void *addr; | |
748 | const __be64 *swinvp; | |
749 | struct iommu_table *tbl; | |
750 | unsigned int tce_table_size, end; | |
751 | int64_t rc; | |
752 | ||
753 | /* We shouldn't already have a 32-bit DMA associated */ | |
754 | if (WARN_ON(pe->tce32_seg >= 0)) | |
755 | return; | |
756 | ||
757 | /* The PE will reserve all possible 32-bits space */ | |
758 | pe->tce32_seg = 0; | |
759 | end = (1 << ilog2(phb->ioda.m32_pci_base)); | |
760 | tce_table_size = (end / 0x1000) * 8; | |
761 | pe_info(pe, "Setting up 32-bit TCE table at 0..%08x\n", | |
762 | end); | |
763 | ||
764 | /* Allocate TCE table */ | |
765 | tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL, | |
766 | get_order(tce_table_size)); | |
767 | if (!tce_mem) { | |
768 | pe_err(pe, "Failed to allocate a 32-bit TCE memory\n"); | |
769 | goto fail; | |
770 | } | |
771 | addr = page_address(tce_mem); | |
772 | memset(addr, 0, tce_table_size); | |
773 | ||
774 | /* | |
775 | * Map TCE table through TVT. The TVE index is the PE number | |
776 | * shifted by 1 bit for 32-bits DMA space. | |
777 | */ | |
778 | rc = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number, | |
779 | pe->pe_number << 1, 1, __pa(addr), | |
780 | tce_table_size, 0x1000); | |
781 | if (rc) { | |
782 | pe_err(pe, "Failed to configure 32-bit TCE table," | |
783 | " err %ld\n", rc); | |
784 | goto fail; | |
785 | } | |
786 | ||
787 | /* Setup linux iommu table */ | |
788 | tbl = &pe->tce32_table; | |
789 | pnv_pci_setup_iommu_table(tbl, addr, tce_table_size, 0); | |
790 | ||
791 | /* OPAL variant of PHB3 invalidated TCEs */ | |
792 | swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL); | |
793 | if (swinvp) { | |
794 | /* We need a couple more fields -- an address and a data | |
795 | * to or. Since the bus is only printed out on table free | |
796 | * errors, and on the first pass the data will be a relative | |
797 | * bus number, print that out instead. | |
798 | */ | |
8e0a1611 AK |
799 | pe->tce_inval_reg_phys = be64_to_cpup(swinvp); |
800 | tbl->it_index = (unsigned long)ioremap(pe->tce_inval_reg_phys, | |
801 | 8); | |
65fd766b | 802 | tbl->it_type |= (TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE); |
373f5657 GS |
803 | } |
804 | iommu_init_table(tbl, phb->hose->node); | |
e9bc03fe | 805 | iommu_register_group(tbl, phb->hose->global_number, pe->pe_number); |
373f5657 | 806 | |
74251fe2 | 807 | if (pe->pdev) |
d905c5df | 808 | set_iommu_table_base_and_group(&pe->pdev->dev, tbl); |
74251fe2 BH |
809 | else |
810 | pnv_ioda_setup_bus_dma(pe, pe->pbus); | |
811 | ||
cd15b048 BH |
812 | /* Also create a bypass window */ |
813 | pnv_pci_ioda2_setup_bypass_pe(phb, pe); | |
373f5657 GS |
814 | return; |
815 | fail: | |
816 | if (pe->tce32_seg >= 0) | |
817 | pe->tce32_seg = -1; | |
818 | if (tce_mem) | |
819 | __free_pages(tce_mem, get_order(tce_table_size)); | |
820 | } | |
821 | ||
cad5cef6 | 822 | static void pnv_ioda_setup_dma(struct pnv_phb *phb) |
184cd4a3 BH |
823 | { |
824 | struct pci_controller *hose = phb->hose; | |
825 | unsigned int residual, remaining, segs, tw, base; | |
826 | struct pnv_ioda_pe *pe; | |
827 | ||
828 | /* If we have more PE# than segments available, hand out one | |
829 | * per PE until we run out and let the rest fail. If not, | |
830 | * then we assign at least one segment per PE, plus more based | |
831 | * on the amount of devices under that PE | |
832 | */ | |
833 | if (phb->ioda.dma_pe_count > phb->ioda.tce32_count) | |
834 | residual = 0; | |
835 | else | |
836 | residual = phb->ioda.tce32_count - | |
837 | phb->ioda.dma_pe_count; | |
838 | ||
839 | pr_info("PCI: Domain %04x has %ld available 32-bit DMA segments\n", | |
840 | hose->global_number, phb->ioda.tce32_count); | |
841 | pr_info("PCI: %d PE# for a total weight of %d\n", | |
842 | phb->ioda.dma_pe_count, phb->ioda.dma_weight); | |
843 | ||
844 | /* Walk our PE list and configure their DMA segments, hand them | |
845 | * out one base segment plus any residual segments based on | |
846 | * weight | |
847 | */ | |
848 | remaining = phb->ioda.tce32_count; | |
849 | tw = phb->ioda.dma_weight; | |
850 | base = 0; | |
7ebdf956 | 851 | list_for_each_entry(pe, &phb->ioda.pe_dma_list, dma_link) { |
184cd4a3 BH |
852 | if (!pe->dma_weight) |
853 | continue; | |
854 | if (!remaining) { | |
855 | pe_warn(pe, "No DMA32 resources available\n"); | |
856 | continue; | |
857 | } | |
858 | segs = 1; | |
859 | if (residual) { | |
860 | segs += ((pe->dma_weight * residual) + (tw / 2)) / tw; | |
861 | if (segs > remaining) | |
862 | segs = remaining; | |
863 | } | |
373f5657 GS |
864 | |
865 | /* | |
866 | * For IODA2 compliant PHB3, we needn't care about the weight. | |
867 | * The all available 32-bits DMA space will be assigned to | |
868 | * the specific PE. | |
869 | */ | |
870 | if (phb->type == PNV_PHB_IODA1) { | |
871 | pe_info(pe, "DMA weight %d, assigned %d DMA32 segments\n", | |
872 | pe->dma_weight, segs); | |
873 | pnv_pci_ioda_setup_dma_pe(phb, pe, base, segs); | |
874 | } else { | |
875 | pe_info(pe, "Assign DMA32 space\n"); | |
876 | segs = 0; | |
877 | pnv_pci_ioda2_setup_dma_pe(phb, pe); | |
878 | } | |
879 | ||
184cd4a3 BH |
880 | remaining -= segs; |
881 | base += segs; | |
882 | } | |
883 | } | |
884 | ||
885 | #ifdef CONFIG_PCI_MSI | |
137436c9 GS |
886 | static void pnv_ioda2_msi_eoi(struct irq_data *d) |
887 | { | |
888 | unsigned int hw_irq = (unsigned int)irqd_to_hwirq(d); | |
889 | struct irq_chip *chip = irq_data_get_irq_chip(d); | |
890 | struct pnv_phb *phb = container_of(chip, struct pnv_phb, | |
891 | ioda.irq_chip); | |
892 | int64_t rc; | |
893 | ||
894 | rc = opal_pci_msi_eoi(phb->opal_id, hw_irq); | |
895 | WARN_ON_ONCE(rc); | |
896 | ||
897 | icp_native_eoi(d); | |
898 | } | |
899 | ||
184cd4a3 | 900 | static int pnv_pci_ioda_msi_setup(struct pnv_phb *phb, struct pci_dev *dev, |
137436c9 GS |
901 | unsigned int hwirq, unsigned int virq, |
902 | unsigned int is_64, struct msi_msg *msg) | |
184cd4a3 BH |
903 | { |
904 | struct pnv_ioda_pe *pe = pnv_ioda_get_pe(dev); | |
b72c1f65 | 905 | struct pci_dn *pdn = pci_get_pdn(dev); |
137436c9 GS |
906 | struct irq_data *idata; |
907 | struct irq_chip *ichip; | |
184cd4a3 | 908 | unsigned int xive_num = hwirq - phb->msi_base; |
3a1a4661 | 909 | __be32 data; |
184cd4a3 BH |
910 | int rc; |
911 | ||
912 | /* No PE assigned ? bail out ... no MSI for you ! */ | |
913 | if (pe == NULL) | |
914 | return -ENXIO; | |
915 | ||
916 | /* Check if we have an MVE */ | |
917 | if (pe->mve_number < 0) | |
918 | return -ENXIO; | |
919 | ||
b72c1f65 BH |
920 | /* Force 32-bit MSI on some broken devices */ |
921 | if (pdn && pdn->force_32bit_msi) | |
922 | is_64 = 0; | |
923 | ||
184cd4a3 BH |
924 | /* Assign XIVE to PE */ |
925 | rc = opal_pci_set_xive_pe(phb->opal_id, pe->pe_number, xive_num); | |
926 | if (rc) { | |
927 | pr_warn("%s: OPAL error %d setting XIVE %d PE\n", | |
928 | pci_name(dev), rc, xive_num); | |
929 | return -EIO; | |
930 | } | |
931 | ||
932 | if (is_64) { | |
3a1a4661 BH |
933 | __be64 addr64; |
934 | ||
184cd4a3 BH |
935 | rc = opal_get_msi_64(phb->opal_id, pe->mve_number, xive_num, 1, |
936 | &addr64, &data); | |
937 | if (rc) { | |
938 | pr_warn("%s: OPAL error %d getting 64-bit MSI data\n", | |
939 | pci_name(dev), rc); | |
940 | return -EIO; | |
941 | } | |
3a1a4661 BH |
942 | msg->address_hi = be64_to_cpu(addr64) >> 32; |
943 | msg->address_lo = be64_to_cpu(addr64) & 0xfffffffful; | |
184cd4a3 | 944 | } else { |
3a1a4661 BH |
945 | __be32 addr32; |
946 | ||
184cd4a3 BH |
947 | rc = opal_get_msi_32(phb->opal_id, pe->mve_number, xive_num, 1, |
948 | &addr32, &data); | |
949 | if (rc) { | |
950 | pr_warn("%s: OPAL error %d getting 32-bit MSI data\n", | |
951 | pci_name(dev), rc); | |
952 | return -EIO; | |
953 | } | |
954 | msg->address_hi = 0; | |
3a1a4661 | 955 | msg->address_lo = be32_to_cpu(addr32); |
184cd4a3 | 956 | } |
3a1a4661 | 957 | msg->data = be32_to_cpu(data); |
184cd4a3 | 958 | |
137436c9 GS |
959 | /* |
960 | * Change the IRQ chip for the MSI interrupts on PHB3. | |
961 | * The corresponding IRQ chip should be populated for | |
962 | * the first time. | |
963 | */ | |
964 | if (phb->type == PNV_PHB_IODA2) { | |
965 | if (!phb->ioda.irq_chip_init) { | |
966 | idata = irq_get_irq_data(virq); | |
967 | ichip = irq_data_get_irq_chip(idata); | |
968 | phb->ioda.irq_chip_init = 1; | |
969 | phb->ioda.irq_chip = *ichip; | |
970 | phb->ioda.irq_chip.irq_eoi = pnv_ioda2_msi_eoi; | |
971 | } | |
972 | ||
973 | irq_set_chip(virq, &phb->ioda.irq_chip); | |
974 | } | |
975 | ||
184cd4a3 BH |
976 | pr_devel("%s: %s-bit MSI on hwirq %x (xive #%d)," |
977 | " address=%x_%08x data=%x PE# %d\n", | |
978 | pci_name(dev), is_64 ? "64" : "32", hwirq, xive_num, | |
979 | msg->address_hi, msg->address_lo, data, pe->pe_number); | |
980 | ||
981 | return 0; | |
982 | } | |
983 | ||
984 | static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) | |
985 | { | |
fb1b55d6 | 986 | unsigned int count; |
184cd4a3 BH |
987 | const __be32 *prop = of_get_property(phb->hose->dn, |
988 | "ibm,opal-msi-ranges", NULL); | |
989 | if (!prop) { | |
990 | /* BML Fallback */ | |
991 | prop = of_get_property(phb->hose->dn, "msi-ranges", NULL); | |
992 | } | |
993 | if (!prop) | |
994 | return; | |
995 | ||
996 | phb->msi_base = be32_to_cpup(prop); | |
fb1b55d6 GS |
997 | count = be32_to_cpup(prop + 1); |
998 | if (msi_bitmap_alloc(&phb->msi_bmp, count, phb->hose->dn)) { | |
184cd4a3 BH |
999 | pr_err("PCI %d: Failed to allocate MSI bitmap !\n", |
1000 | phb->hose->global_number); | |
1001 | return; | |
1002 | } | |
fb1b55d6 | 1003 | |
184cd4a3 BH |
1004 | phb->msi_setup = pnv_pci_ioda_msi_setup; |
1005 | phb->msi32_support = 1; | |
1006 | pr_info(" Allocated bitmap for %d MSIs (base IRQ 0x%x)\n", | |
fb1b55d6 | 1007 | count, phb->msi_base); |
184cd4a3 BH |
1008 | } |
1009 | #else | |
1010 | static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) { } | |
1011 | #endif /* CONFIG_PCI_MSI */ | |
1012 | ||
11685bec GS |
1013 | /* |
1014 | * This function is supposed to be called on basis of PE from top | |
1015 | * to bottom style. So the the I/O or MMIO segment assigned to | |
1016 | * parent PE could be overrided by its child PEs if necessary. | |
1017 | */ | |
cad5cef6 GKH |
1018 | static void pnv_ioda_setup_pe_seg(struct pci_controller *hose, |
1019 | struct pnv_ioda_pe *pe) | |
11685bec GS |
1020 | { |
1021 | struct pnv_phb *phb = hose->private_data; | |
1022 | struct pci_bus_region region; | |
1023 | struct resource *res; | |
1024 | int i, index; | |
1025 | int rc; | |
1026 | ||
1027 | /* | |
1028 | * NOTE: We only care PCI bus based PE for now. For PCI | |
1029 | * device based PE, for example SRIOV sensitive VF should | |
1030 | * be figured out later. | |
1031 | */ | |
1032 | BUG_ON(!(pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL))); | |
1033 | ||
1034 | pci_bus_for_each_resource(pe->pbus, res, i) { | |
1035 | if (!res || !res->flags || | |
1036 | res->start > res->end) | |
1037 | continue; | |
1038 | ||
1039 | if (res->flags & IORESOURCE_IO) { | |
1040 | region.start = res->start - phb->ioda.io_pci_base; | |
1041 | region.end = res->end - phb->ioda.io_pci_base; | |
1042 | index = region.start / phb->ioda.io_segsize; | |
1043 | ||
1044 | while (index < phb->ioda.total_pe && | |
1045 | region.start <= region.end) { | |
1046 | phb->ioda.io_segmap[index] = pe->pe_number; | |
1047 | rc = opal_pci_map_pe_mmio_window(phb->opal_id, | |
1048 | pe->pe_number, OPAL_IO_WINDOW_TYPE, 0, index); | |
1049 | if (rc != OPAL_SUCCESS) { | |
1050 | pr_err("%s: OPAL error %d when mapping IO " | |
1051 | "segment #%d to PE#%d\n", | |
1052 | __func__, rc, index, pe->pe_number); | |
1053 | break; | |
1054 | } | |
1055 | ||
1056 | region.start += phb->ioda.io_segsize; | |
1057 | index++; | |
1058 | } | |
1059 | } else if (res->flags & IORESOURCE_MEM) { | |
3fd47f06 BH |
1060 | /* WARNING: Assumes M32 is mem region 0 in PHB. We need to |
1061 | * harden that algorithm when we start supporting M64 | |
1062 | */ | |
11685bec | 1063 | region.start = res->start - |
3fd47f06 | 1064 | hose->mem_offset[0] - |
11685bec GS |
1065 | phb->ioda.m32_pci_base; |
1066 | region.end = res->end - | |
3fd47f06 | 1067 | hose->mem_offset[0] - |
11685bec GS |
1068 | phb->ioda.m32_pci_base; |
1069 | index = region.start / phb->ioda.m32_segsize; | |
1070 | ||
1071 | while (index < phb->ioda.total_pe && | |
1072 | region.start <= region.end) { | |
1073 | phb->ioda.m32_segmap[index] = pe->pe_number; | |
1074 | rc = opal_pci_map_pe_mmio_window(phb->opal_id, | |
1075 | pe->pe_number, OPAL_M32_WINDOW_TYPE, 0, index); | |
1076 | if (rc != OPAL_SUCCESS) { | |
1077 | pr_err("%s: OPAL error %d when mapping M32 " | |
1078 | "segment#%d to PE#%d", | |
1079 | __func__, rc, index, pe->pe_number); | |
1080 | break; | |
1081 | } | |
1082 | ||
1083 | region.start += phb->ioda.m32_segsize; | |
1084 | index++; | |
1085 | } | |
1086 | } | |
1087 | } | |
1088 | } | |
1089 | ||
cad5cef6 | 1090 | static void pnv_pci_ioda_setup_seg(void) |
11685bec GS |
1091 | { |
1092 | struct pci_controller *tmp, *hose; | |
1093 | struct pnv_phb *phb; | |
1094 | struct pnv_ioda_pe *pe; | |
1095 | ||
1096 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { | |
1097 | phb = hose->private_data; | |
1098 | list_for_each_entry(pe, &phb->ioda.pe_list, list) { | |
1099 | pnv_ioda_setup_pe_seg(hose, pe); | |
1100 | } | |
1101 | } | |
1102 | } | |
1103 | ||
cad5cef6 | 1104 | static void pnv_pci_ioda_setup_DMA(void) |
13395c48 GS |
1105 | { |
1106 | struct pci_controller *hose, *tmp; | |
db1266c8 | 1107 | struct pnv_phb *phb; |
13395c48 GS |
1108 | |
1109 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { | |
1110 | pnv_ioda_setup_dma(hose->private_data); | |
db1266c8 GS |
1111 | |
1112 | /* Mark the PHB initialization done */ | |
1113 | phb = hose->private_data; | |
1114 | phb->initialized = 1; | |
13395c48 GS |
1115 | } |
1116 | } | |
1117 | ||
37c367f2 GS |
1118 | static void pnv_pci_ioda_create_dbgfs(void) |
1119 | { | |
1120 | #ifdef CONFIG_DEBUG_FS | |
1121 | struct pci_controller *hose, *tmp; | |
1122 | struct pnv_phb *phb; | |
1123 | char name[16]; | |
1124 | ||
1125 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { | |
1126 | phb = hose->private_data; | |
1127 | ||
1128 | sprintf(name, "PCI%04x", hose->global_number); | |
1129 | phb->dbgfs = debugfs_create_dir(name, powerpc_debugfs_root); | |
1130 | if (!phb->dbgfs) | |
1131 | pr_warning("%s: Error on creating debugfs on PHB#%x\n", | |
1132 | __func__, hose->global_number); | |
1133 | } | |
1134 | #endif /* CONFIG_DEBUG_FS */ | |
1135 | } | |
1136 | ||
cad5cef6 | 1137 | static void pnv_pci_ioda_fixup(void) |
fb446ad0 GS |
1138 | { |
1139 | pnv_pci_ioda_setup_PEs(); | |
11685bec | 1140 | pnv_pci_ioda_setup_seg(); |
13395c48 | 1141 | pnv_pci_ioda_setup_DMA(); |
e9cc17d4 | 1142 | |
37c367f2 GS |
1143 | pnv_pci_ioda_create_dbgfs(); |
1144 | ||
e9cc17d4 | 1145 | #ifdef CONFIG_EEH |
88b6d14b | 1146 | eeh_probe_mode_set(EEH_PROBE_MODE_DEV); |
e9cc17d4 GS |
1147 | eeh_addr_cache_build(); |
1148 | eeh_init(); | |
1149 | #endif | |
fb446ad0 GS |
1150 | } |
1151 | ||
271fd03a GS |
1152 | /* |
1153 | * Returns the alignment for I/O or memory windows for P2P | |
1154 | * bridges. That actually depends on how PEs are segmented. | |
1155 | * For now, we return I/O or M32 segment size for PE sensitive | |
1156 | * P2P bridges. Otherwise, the default values (4KiB for I/O, | |
1157 | * 1MiB for memory) will be returned. | |
1158 | * | |
1159 | * The current PCI bus might be put into one PE, which was | |
1160 | * create against the parent PCI bridge. For that case, we | |
1161 | * needn't enlarge the alignment so that we can save some | |
1162 | * resources. | |
1163 | */ | |
1164 | static resource_size_t pnv_pci_window_alignment(struct pci_bus *bus, | |
1165 | unsigned long type) | |
1166 | { | |
1167 | struct pci_dev *bridge; | |
1168 | struct pci_controller *hose = pci_bus_to_host(bus); | |
1169 | struct pnv_phb *phb = hose->private_data; | |
1170 | int num_pci_bridges = 0; | |
1171 | ||
1172 | bridge = bus->self; | |
1173 | while (bridge) { | |
1174 | if (pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE) { | |
1175 | num_pci_bridges++; | |
1176 | if (num_pci_bridges >= 2) | |
1177 | return 1; | |
1178 | } | |
1179 | ||
1180 | bridge = bridge->bus->self; | |
1181 | } | |
1182 | ||
1183 | /* We need support prefetchable memory window later */ | |
1184 | if (type & IORESOURCE_MEM) | |
1185 | return phb->ioda.m32_segsize; | |
1186 | ||
1187 | return phb->ioda.io_segsize; | |
1188 | } | |
1189 | ||
184cd4a3 BH |
1190 | /* Prevent enabling devices for which we couldn't properly |
1191 | * assign a PE | |
1192 | */ | |
cad5cef6 | 1193 | static int pnv_pci_enable_device_hook(struct pci_dev *dev) |
184cd4a3 | 1194 | { |
db1266c8 GS |
1195 | struct pci_controller *hose = pci_bus_to_host(dev->bus); |
1196 | struct pnv_phb *phb = hose->private_data; | |
1197 | struct pci_dn *pdn; | |
184cd4a3 | 1198 | |
db1266c8 GS |
1199 | /* The function is probably called while the PEs have |
1200 | * not be created yet. For example, resource reassignment | |
1201 | * during PCI probe period. We just skip the check if | |
1202 | * PEs isn't ready. | |
1203 | */ | |
1204 | if (!phb->initialized) | |
1205 | return 0; | |
1206 | ||
b72c1f65 | 1207 | pdn = pci_get_pdn(dev); |
184cd4a3 BH |
1208 | if (!pdn || pdn->pe_number == IODA_INVALID_PE) |
1209 | return -EINVAL; | |
db1266c8 | 1210 | |
184cd4a3 BH |
1211 | return 0; |
1212 | } | |
1213 | ||
1214 | static u32 pnv_ioda_bdfn_to_pe(struct pnv_phb *phb, struct pci_bus *bus, | |
1215 | u32 devfn) | |
1216 | { | |
1217 | return phb->ioda.pe_rmap[(bus->number << 8) | devfn]; | |
1218 | } | |
1219 | ||
73ed148a BH |
1220 | static void pnv_pci_ioda_shutdown(struct pnv_phb *phb) |
1221 | { | |
1222 | opal_pci_reset(phb->opal_id, OPAL_PCI_IODA_TABLE_RESET, | |
1223 | OPAL_ASSERT_RESET); | |
1224 | } | |
1225 | ||
e9cc17d4 GS |
1226 | void __init pnv_pci_init_ioda_phb(struct device_node *np, |
1227 | u64 hub_id, int ioda_type) | |
184cd4a3 BH |
1228 | { |
1229 | struct pci_controller *hose; | |
184cd4a3 | 1230 | struct pnv_phb *phb; |
8184616f | 1231 | unsigned long size, m32map_off, pemap_off, iomap_off = 0; |
c681b93c | 1232 | const __be64 *prop64; |
3a1a4661 | 1233 | const __be32 *prop32; |
f1b7cc3e | 1234 | int len; |
184cd4a3 BH |
1235 | u64 phb_id; |
1236 | void *aux; | |
1237 | long rc; | |
1238 | ||
58d714ec | 1239 | pr_info("Initializing IODA%d OPAL PHB %s\n", ioda_type, np->full_name); |
184cd4a3 BH |
1240 | |
1241 | prop64 = of_get_property(np, "ibm,opal-phbid", NULL); | |
1242 | if (!prop64) { | |
1243 | pr_err(" Missing \"ibm,opal-phbid\" property !\n"); | |
1244 | return; | |
1245 | } | |
1246 | phb_id = be64_to_cpup(prop64); | |
1247 | pr_debug(" PHB-ID : 0x%016llx\n", phb_id); | |
1248 | ||
1249 | phb = alloc_bootmem(sizeof(struct pnv_phb)); | |
58d714ec GS |
1250 | if (!phb) { |
1251 | pr_err(" Out of memory !\n"); | |
1252 | return; | |
184cd4a3 | 1253 | } |
58d714ec GS |
1254 | |
1255 | /* Allocate PCI controller */ | |
1256 | memset(phb, 0, sizeof(struct pnv_phb)); | |
1257 | phb->hose = hose = pcibios_alloc_controller(np); | |
1258 | if (!phb->hose) { | |
1259 | pr_err(" Can't allocate PCI controller for %s\n", | |
184cd4a3 | 1260 | np->full_name); |
58d714ec | 1261 | free_bootmem((unsigned long)phb, sizeof(struct pnv_phb)); |
184cd4a3 BH |
1262 | return; |
1263 | } | |
1264 | ||
1265 | spin_lock_init(&phb->lock); | |
f1b7cc3e GS |
1266 | prop32 = of_get_property(np, "bus-range", &len); |
1267 | if (prop32 && len == 8) { | |
3a1a4661 BH |
1268 | hose->first_busno = be32_to_cpu(prop32[0]); |
1269 | hose->last_busno = be32_to_cpu(prop32[1]); | |
f1b7cc3e GS |
1270 | } else { |
1271 | pr_warn(" Broken <bus-range> on %s\n", np->full_name); | |
1272 | hose->first_busno = 0; | |
1273 | hose->last_busno = 0xff; | |
1274 | } | |
184cd4a3 | 1275 | hose->private_data = phb; |
e9cc17d4 | 1276 | phb->hub_id = hub_id; |
184cd4a3 | 1277 | phb->opal_id = phb_id; |
aa0c033f | 1278 | phb->type = ioda_type; |
184cd4a3 | 1279 | |
cee72d5b BH |
1280 | /* Detect specific models for error handling */ |
1281 | if (of_device_is_compatible(np, "ibm,p7ioc-pciex")) | |
1282 | phb->model = PNV_PHB_MODEL_P7IOC; | |
f3d40c25 | 1283 | else if (of_device_is_compatible(np, "ibm,power8-pciex")) |
aa0c033f | 1284 | phb->model = PNV_PHB_MODEL_PHB3; |
cee72d5b BH |
1285 | else |
1286 | phb->model = PNV_PHB_MODEL_UNKNOWN; | |
1287 | ||
aa0c033f | 1288 | /* Parse 32-bit and IO ranges (if any) */ |
2f1ec02e | 1289 | pci_process_bridge_OF_ranges(hose, np, !hose->global_number); |
184cd4a3 | 1290 | |
aa0c033f | 1291 | /* Get registers */ |
184cd4a3 BH |
1292 | phb->regs = of_iomap(np, 0); |
1293 | if (phb->regs == NULL) | |
1294 | pr_err(" Failed to map registers !\n"); | |
1295 | ||
184cd4a3 | 1296 | /* Initialize more IODA stuff */ |
36954dc7 | 1297 | phb->ioda.total_pe = 1; |
aa0c033f | 1298 | prop32 = of_get_property(np, "ibm,opal-num-pes", NULL); |
36954dc7 | 1299 | if (prop32) |
3a1a4661 | 1300 | phb->ioda.total_pe = be32_to_cpup(prop32); |
36954dc7 GS |
1301 | prop32 = of_get_property(np, "ibm,opal-reserved-pe", NULL); |
1302 | if (prop32) | |
1303 | phb->ioda.reserved_pe = be32_to_cpup(prop32); | |
184cd4a3 | 1304 | phb->ioda.m32_size = resource_size(&hose->mem_resources[0]); |
aa0c033f | 1305 | /* FW Has already off top 64k of M32 space (MSI space) */ |
184cd4a3 BH |
1306 | phb->ioda.m32_size += 0x10000; |
1307 | ||
1308 | phb->ioda.m32_segsize = phb->ioda.m32_size / phb->ioda.total_pe; | |
3fd47f06 | 1309 | phb->ioda.m32_pci_base = hose->mem_resources[0].start - hose->mem_offset[0]; |
184cd4a3 BH |
1310 | phb->ioda.io_size = hose->pci_io_size; |
1311 | phb->ioda.io_segsize = phb->ioda.io_size / phb->ioda.total_pe; | |
1312 | phb->ioda.io_pci_base = 0; /* XXX calculate this ? */ | |
1313 | ||
c35d2a8c | 1314 | /* Allocate aux data & arrays. We don't have IO ports on PHB3 */ |
184cd4a3 BH |
1315 | size = _ALIGN_UP(phb->ioda.total_pe / 8, sizeof(unsigned long)); |
1316 | m32map_off = size; | |
e47747f4 | 1317 | size += phb->ioda.total_pe * sizeof(phb->ioda.m32_segmap[0]); |
c35d2a8c GS |
1318 | if (phb->type == PNV_PHB_IODA1) { |
1319 | iomap_off = size; | |
1320 | size += phb->ioda.total_pe * sizeof(phb->ioda.io_segmap[0]); | |
1321 | } | |
184cd4a3 BH |
1322 | pemap_off = size; |
1323 | size += phb->ioda.total_pe * sizeof(struct pnv_ioda_pe); | |
1324 | aux = alloc_bootmem(size); | |
1325 | memset(aux, 0, size); | |
1326 | phb->ioda.pe_alloc = aux; | |
1327 | phb->ioda.m32_segmap = aux + m32map_off; | |
c35d2a8c GS |
1328 | if (phb->type == PNV_PHB_IODA1) |
1329 | phb->ioda.io_segmap = aux + iomap_off; | |
184cd4a3 | 1330 | phb->ioda.pe_array = aux + pemap_off; |
36954dc7 | 1331 | set_bit(phb->ioda.reserved_pe, phb->ioda.pe_alloc); |
184cd4a3 | 1332 | |
7ebdf956 | 1333 | INIT_LIST_HEAD(&phb->ioda.pe_dma_list); |
184cd4a3 BH |
1334 | INIT_LIST_HEAD(&phb->ioda.pe_list); |
1335 | ||
1336 | /* Calculate how many 32-bit TCE segments we have */ | |
1337 | phb->ioda.tce32_count = phb->ioda.m32_pci_base >> 28; | |
1338 | ||
1339 | /* Clear unusable m64 */ | |
1340 | hose->mem_resources[1].flags = 0; | |
1341 | hose->mem_resources[1].start = 0; | |
1342 | hose->mem_resources[1].end = 0; | |
1343 | hose->mem_resources[2].flags = 0; | |
1344 | hose->mem_resources[2].start = 0; | |
1345 | hose->mem_resources[2].end = 0; | |
1346 | ||
aa0c033f | 1347 | #if 0 /* We should really do that ... */ |
184cd4a3 BH |
1348 | rc = opal_pci_set_phb_mem_window(opal->phb_id, |
1349 | window_type, | |
1350 | window_num, | |
1351 | starting_real_address, | |
1352 | starting_pci_address, | |
1353 | segment_size); | |
1354 | #endif | |
1355 | ||
36954dc7 GS |
1356 | pr_info(" %d (%d) PE's M32: 0x%x [segment=0x%x]" |
1357 | " IO: 0x%x [segment=0x%x]\n", | |
184cd4a3 | 1358 | phb->ioda.total_pe, |
36954dc7 | 1359 | phb->ioda.reserved_pe, |
184cd4a3 BH |
1360 | phb->ioda.m32_size, phb->ioda.m32_segsize, |
1361 | phb->ioda.io_size, phb->ioda.io_segsize); | |
1362 | ||
184cd4a3 | 1363 | phb->hose->ops = &pnv_pci_ops; |
e9cc17d4 GS |
1364 | #ifdef CONFIG_EEH |
1365 | phb->eeh_ops = &ioda_eeh_ops; | |
1366 | #endif | |
184cd4a3 BH |
1367 | |
1368 | /* Setup RID -> PE mapping function */ | |
1369 | phb->bdfn_to_pe = pnv_ioda_bdfn_to_pe; | |
1370 | ||
1371 | /* Setup TCEs */ | |
1372 | phb->dma_dev_setup = pnv_pci_ioda_dma_dev_setup; | |
cd15b048 | 1373 | phb->dma_set_mask = pnv_pci_ioda_dma_set_mask; |
184cd4a3 | 1374 | |
73ed148a BH |
1375 | /* Setup shutdown function for kexec */ |
1376 | phb->shutdown = pnv_pci_ioda_shutdown; | |
1377 | ||
184cd4a3 BH |
1378 | /* Setup MSI support */ |
1379 | pnv_pci_init_ioda_msis(phb); | |
1380 | ||
c40a4210 GS |
1381 | /* |
1382 | * We pass the PCI probe flag PCI_REASSIGN_ALL_RSRC here | |
1383 | * to let the PCI core do resource assignment. It's supposed | |
1384 | * that the PCI core will do correct I/O and MMIO alignment | |
1385 | * for the P2P bridge bars so that each PCI bus (excluding | |
1386 | * the child P2P bridges) can form individual PE. | |
184cd4a3 | 1387 | */ |
fb446ad0 | 1388 | ppc_md.pcibios_fixup = pnv_pci_ioda_fixup; |
184cd4a3 | 1389 | ppc_md.pcibios_enable_device_hook = pnv_pci_enable_device_hook; |
271fd03a | 1390 | ppc_md.pcibios_window_alignment = pnv_pci_window_alignment; |
d92a208d | 1391 | ppc_md.pcibios_reset_secondary_bus = pnv_pci_reset_secondary_bus; |
c40a4210 | 1392 | pci_add_flags(PCI_REASSIGN_ALL_RSRC); |
184cd4a3 BH |
1393 | |
1394 | /* Reset IODA tables to a clean state */ | |
f11fe552 | 1395 | rc = opal_pci_reset(phb_id, OPAL_PCI_IODA_TABLE_RESET, OPAL_ASSERT_RESET); |
184cd4a3 | 1396 | if (rc) |
f11fe552 | 1397 | pr_warning(" OPAL Error %ld performing IODA table reset !\n", rc); |
361f2a2a GS |
1398 | |
1399 | /* If we're running in kdump kerenl, the previous kerenl never | |
1400 | * shutdown PCI devices correctly. We already got IODA table | |
1401 | * cleaned out. So we have to issue PHB reset to stop all PCI | |
1402 | * transactions from previous kerenl. | |
1403 | */ | |
1404 | if (is_kdump_kernel()) { | |
1405 | pr_info(" Issue PHB reset ...\n"); | |
1406 | ioda_eeh_phb_reset(hose, EEH_RESET_FUNDAMENTAL); | |
1407 | ioda_eeh_phb_reset(hose, OPAL_DEASSERT_RESET); | |
1408 | } | |
aa0c033f GS |
1409 | } |
1410 | ||
67975005 | 1411 | void __init pnv_pci_init_ioda2_phb(struct device_node *np) |
aa0c033f | 1412 | { |
e9cc17d4 | 1413 | pnv_pci_init_ioda_phb(np, 0, PNV_PHB_IODA2); |
184cd4a3 BH |
1414 | } |
1415 | ||
1416 | void __init pnv_pci_init_ioda_hub(struct device_node *np) | |
1417 | { | |
1418 | struct device_node *phbn; | |
c681b93c | 1419 | const __be64 *prop64; |
184cd4a3 BH |
1420 | u64 hub_id; |
1421 | ||
1422 | pr_info("Probing IODA IO-Hub %s\n", np->full_name); | |
1423 | ||
1424 | prop64 = of_get_property(np, "ibm,opal-hubid", NULL); | |
1425 | if (!prop64) { | |
1426 | pr_err(" Missing \"ibm,opal-hubid\" property !\n"); | |
1427 | return; | |
1428 | } | |
1429 | hub_id = be64_to_cpup(prop64); | |
1430 | pr_devel(" HUB-ID : 0x%016llx\n", hub_id); | |
1431 | ||
1432 | /* Count child PHBs */ | |
1433 | for_each_child_of_node(np, phbn) { | |
1434 | /* Look for IODA1 PHBs */ | |
1435 | if (of_device_is_compatible(phbn, "ibm,ioda-phb")) | |
e9cc17d4 | 1436 | pnv_pci_init_ioda_phb(phbn, hub_id, PNV_PHB_IODA1); |
184cd4a3 BH |
1437 | } |
1438 | } |