Commit | Line | Data |
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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> | |
16 | #include <linux/delay.h> | |
17 | #include <linux/string.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/bootmem.h> | |
20 | #include <linux/irq.h> | |
21 | #include <linux/io.h> | |
22 | #include <linux/msi.h> | |
23 | ||
24 | #include <asm/sections.h> | |
25 | #include <asm/io.h> | |
26 | #include <asm/prom.h> | |
27 | #include <asm/pci-bridge.h> | |
28 | #include <asm/machdep.h> | |
fb1b55d6 | 29 | #include <asm/msi_bitmap.h> |
184cd4a3 BH |
30 | #include <asm/ppc-pci.h> |
31 | #include <asm/opal.h> | |
32 | #include <asm/iommu.h> | |
33 | #include <asm/tce.h> | |
137436c9 | 34 | #include <asm/xics.h> |
184cd4a3 BH |
35 | |
36 | #include "powernv.h" | |
37 | #include "pci.h" | |
38 | ||
184cd4a3 BH |
39 | #define define_pe_printk_level(func, kern_level) \ |
40 | static int func(const struct pnv_ioda_pe *pe, const char *fmt, ...) \ | |
41 | { \ | |
42 | struct va_format vaf; \ | |
43 | va_list args; \ | |
490e078d | 44 | char pfix[32]; \ |
184cd4a3 BH |
45 | int r; \ |
46 | \ | |
47 | va_start(args, fmt); \ | |
48 | \ | |
49 | vaf.fmt = fmt; \ | |
50 | vaf.va = &args; \ | |
51 | \ | |
490e078d GS |
52 | if (pe->pdev) \ |
53 | strlcpy(pfix, dev_name(&pe->pdev->dev), \ | |
54 | sizeof(pfix)); \ | |
55 | else \ | |
56 | sprintf(pfix, "%04x:%02x ", \ | |
57 | pci_domain_nr(pe->pbus), \ | |
58 | pe->pbus->number); \ | |
59 | r = printk(kern_level "pci %s: [PE# %.3d] %pV", \ | |
60 | pfix, pe->pe_number, &vaf); \ | |
61 | \ | |
184cd4a3 BH |
62 | va_end(args); \ |
63 | \ | |
64 | return r; \ | |
65 | } \ | |
66 | ||
67 | define_pe_printk_level(pe_err, KERN_ERR); | |
68 | define_pe_printk_level(pe_warn, KERN_WARNING); | |
69 | define_pe_printk_level(pe_info, KERN_INFO); | |
70 | ||
184cd4a3 BH |
71 | static struct pci_dn *pnv_ioda_get_pdn(struct pci_dev *dev) |
72 | { | |
73 | struct device_node *np; | |
74 | ||
75 | np = pci_device_to_OF_node(dev); | |
76 | if (!np) | |
77 | return NULL; | |
78 | return PCI_DN(np); | |
79 | } | |
80 | ||
cad5cef6 | 81 | static int pnv_ioda_alloc_pe(struct pnv_phb *phb) |
184cd4a3 BH |
82 | { |
83 | unsigned long pe; | |
84 | ||
85 | do { | |
86 | pe = find_next_zero_bit(phb->ioda.pe_alloc, | |
87 | phb->ioda.total_pe, 0); | |
88 | if (pe >= phb->ioda.total_pe) | |
89 | return IODA_INVALID_PE; | |
90 | } while(test_and_set_bit(pe, phb->ioda.pe_alloc)); | |
91 | ||
4cce9550 | 92 | phb->ioda.pe_array[pe].phb = phb; |
184cd4a3 BH |
93 | phb->ioda.pe_array[pe].pe_number = pe; |
94 | return pe; | |
95 | } | |
96 | ||
cad5cef6 | 97 | static void pnv_ioda_free_pe(struct pnv_phb *phb, int pe) |
184cd4a3 BH |
98 | { |
99 | WARN_ON(phb->ioda.pe_array[pe].pdev); | |
100 | ||
101 | memset(&phb->ioda.pe_array[pe], 0, sizeof(struct pnv_ioda_pe)); | |
102 | clear_bit(pe, phb->ioda.pe_alloc); | |
103 | } | |
104 | ||
105 | /* Currently those 2 are only used when MSIs are enabled, this will change | |
106 | * but in the meantime, we need to protect them to avoid warnings | |
107 | */ | |
108 | #ifdef CONFIG_PCI_MSI | |
cad5cef6 | 109 | static struct pnv_ioda_pe *pnv_ioda_get_pe(struct pci_dev *dev) |
184cd4a3 BH |
110 | { |
111 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
112 | struct pnv_phb *phb = hose->private_data; | |
113 | struct pci_dn *pdn = pnv_ioda_get_pdn(dev); | |
114 | ||
115 | if (!pdn) | |
116 | return NULL; | |
117 | if (pdn->pe_number == IODA_INVALID_PE) | |
118 | return NULL; | |
119 | return &phb->ioda.pe_array[pdn->pe_number]; | |
120 | } | |
184cd4a3 BH |
121 | #endif /* CONFIG_PCI_MSI */ |
122 | ||
cad5cef6 | 123 | static int pnv_ioda_configure_pe(struct pnv_phb *phb, struct pnv_ioda_pe *pe) |
184cd4a3 BH |
124 | { |
125 | struct pci_dev *parent; | |
126 | uint8_t bcomp, dcomp, fcomp; | |
127 | long rc, rid_end, rid; | |
128 | ||
129 | /* Bus validation ? */ | |
130 | if (pe->pbus) { | |
131 | int count; | |
132 | ||
133 | dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER; | |
134 | fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER; | |
135 | parent = pe->pbus->self; | |
fb446ad0 GS |
136 | if (pe->flags & PNV_IODA_PE_BUS_ALL) |
137 | count = pe->pbus->busn_res.end - pe->pbus->busn_res.start + 1; | |
138 | else | |
139 | count = 1; | |
140 | ||
184cd4a3 BH |
141 | switch(count) { |
142 | case 1: bcomp = OpalPciBusAll; break; | |
143 | case 2: bcomp = OpalPciBus7Bits; break; | |
144 | case 4: bcomp = OpalPciBus6Bits; break; | |
145 | case 8: bcomp = OpalPciBus5Bits; break; | |
146 | case 16: bcomp = OpalPciBus4Bits; break; | |
147 | case 32: bcomp = OpalPciBus3Bits; break; | |
148 | default: | |
149 | pr_err("%s: Number of subordinate busses %d" | |
150 | " unsupported\n", | |
151 | pci_name(pe->pbus->self), count); | |
152 | /* Do an exact match only */ | |
153 | bcomp = OpalPciBusAll; | |
154 | } | |
155 | rid_end = pe->rid + (count << 8); | |
156 | } else { | |
157 | parent = pe->pdev->bus->self; | |
158 | bcomp = OpalPciBusAll; | |
159 | dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER; | |
160 | fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER; | |
161 | rid_end = pe->rid + 1; | |
162 | } | |
163 | ||
164 | /* Associate PE in PELT */ | |
165 | rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid, | |
166 | bcomp, dcomp, fcomp, OPAL_MAP_PE); | |
167 | if (rc) { | |
168 | pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc); | |
169 | return -ENXIO; | |
170 | } | |
171 | opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number, | |
172 | OPAL_EEH_ACTION_CLEAR_FREEZE_ALL); | |
173 | ||
174 | /* Add to all parents PELT-V */ | |
175 | while (parent) { | |
176 | struct pci_dn *pdn = pnv_ioda_get_pdn(parent); | |
177 | if (pdn && pdn->pe_number != IODA_INVALID_PE) { | |
178 | rc = opal_pci_set_peltv(phb->opal_id, pdn->pe_number, | |
cee72d5b | 179 | pe->pe_number, OPAL_ADD_PE_TO_DOMAIN); |
184cd4a3 BH |
180 | /* XXX What to do in case of error ? */ |
181 | } | |
182 | parent = parent->bus->self; | |
183 | } | |
184 | /* Setup reverse map */ | |
185 | for (rid = pe->rid; rid < rid_end; rid++) | |
186 | phb->ioda.pe_rmap[rid] = pe->pe_number; | |
187 | ||
188 | /* Setup one MVTs on IODA1 */ | |
189 | if (phb->type == PNV_PHB_IODA1) { | |
190 | pe->mve_number = pe->pe_number; | |
191 | rc = opal_pci_set_mve(phb->opal_id, pe->mve_number, | |
192 | pe->pe_number); | |
193 | if (rc) { | |
194 | pe_err(pe, "OPAL error %ld setting up MVE %d\n", | |
195 | rc, pe->mve_number); | |
196 | pe->mve_number = -1; | |
197 | } else { | |
198 | rc = opal_pci_set_mve_enable(phb->opal_id, | |
cee72d5b | 199 | pe->mve_number, OPAL_ENABLE_MVE); |
184cd4a3 BH |
200 | if (rc) { |
201 | pe_err(pe, "OPAL error %ld enabling MVE %d\n", | |
202 | rc, pe->mve_number); | |
203 | pe->mve_number = -1; | |
204 | } | |
205 | } | |
206 | } else if (phb->type == PNV_PHB_IODA2) | |
207 | pe->mve_number = 0; | |
208 | ||
209 | return 0; | |
210 | } | |
211 | ||
cad5cef6 GKH |
212 | static void pnv_ioda_link_pe_by_weight(struct pnv_phb *phb, |
213 | struct pnv_ioda_pe *pe) | |
184cd4a3 BH |
214 | { |
215 | struct pnv_ioda_pe *lpe; | |
216 | ||
7ebdf956 | 217 | list_for_each_entry(lpe, &phb->ioda.pe_dma_list, dma_link) { |
184cd4a3 | 218 | if (lpe->dma_weight < pe->dma_weight) { |
7ebdf956 | 219 | list_add_tail(&pe->dma_link, &lpe->dma_link); |
184cd4a3 BH |
220 | return; |
221 | } | |
222 | } | |
7ebdf956 | 223 | list_add_tail(&pe->dma_link, &phb->ioda.pe_dma_list); |
184cd4a3 BH |
224 | } |
225 | ||
226 | static unsigned int pnv_ioda_dma_weight(struct pci_dev *dev) | |
227 | { | |
228 | /* This is quite simplistic. The "base" weight of a device | |
229 | * is 10. 0 means no DMA is to be accounted for it. | |
230 | */ | |
231 | ||
232 | /* If it's a bridge, no DMA */ | |
233 | if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL) | |
234 | return 0; | |
235 | ||
236 | /* Reduce the weight of slow USB controllers */ | |
237 | if (dev->class == PCI_CLASS_SERIAL_USB_UHCI || | |
238 | dev->class == PCI_CLASS_SERIAL_USB_OHCI || | |
239 | dev->class == PCI_CLASS_SERIAL_USB_EHCI) | |
240 | return 3; | |
241 | ||
242 | /* Increase the weight of RAID (includes Obsidian) */ | |
243 | if ((dev->class >> 8) == PCI_CLASS_STORAGE_RAID) | |
244 | return 15; | |
245 | ||
246 | /* Default */ | |
247 | return 10; | |
248 | } | |
249 | ||
fb446ad0 | 250 | #if 0 |
cad5cef6 | 251 | static struct pnv_ioda_pe *pnv_ioda_setup_dev_PE(struct pci_dev *dev) |
184cd4a3 BH |
252 | { |
253 | struct pci_controller *hose = pci_bus_to_host(dev->bus); | |
254 | struct pnv_phb *phb = hose->private_data; | |
255 | struct pci_dn *pdn = pnv_ioda_get_pdn(dev); | |
256 | struct pnv_ioda_pe *pe; | |
257 | int pe_num; | |
258 | ||
259 | if (!pdn) { | |
260 | pr_err("%s: Device tree node not associated properly\n", | |
261 | pci_name(dev)); | |
262 | return NULL; | |
263 | } | |
264 | if (pdn->pe_number != IODA_INVALID_PE) | |
265 | return NULL; | |
266 | ||
267 | /* PE#0 has been pre-set */ | |
268 | if (dev->bus->number == 0) | |
269 | pe_num = 0; | |
270 | else | |
271 | pe_num = pnv_ioda_alloc_pe(phb); | |
272 | if (pe_num == IODA_INVALID_PE) { | |
273 | pr_warning("%s: Not enough PE# available, disabling device\n", | |
274 | pci_name(dev)); | |
275 | return NULL; | |
276 | } | |
277 | ||
278 | /* NOTE: We get only one ref to the pci_dev for the pdn, not for the | |
279 | * pointer in the PE data structure, both should be destroyed at the | |
280 | * same time. However, this needs to be looked at more closely again | |
281 | * once we actually start removing things (Hotplug, SR-IOV, ...) | |
282 | * | |
283 | * At some point we want to remove the PDN completely anyways | |
284 | */ | |
285 | pe = &phb->ioda.pe_array[pe_num]; | |
286 | pci_dev_get(dev); | |
287 | pdn->pcidev = dev; | |
288 | pdn->pe_number = pe_num; | |
289 | pe->pdev = dev; | |
290 | pe->pbus = NULL; | |
291 | pe->tce32_seg = -1; | |
292 | pe->mve_number = -1; | |
293 | pe->rid = dev->bus->number << 8 | pdn->devfn; | |
294 | ||
295 | pe_info(pe, "Associated device to PE\n"); | |
296 | ||
297 | if (pnv_ioda_configure_pe(phb, pe)) { | |
298 | /* XXX What do we do here ? */ | |
299 | if (pe_num) | |
300 | pnv_ioda_free_pe(phb, pe_num); | |
301 | pdn->pe_number = IODA_INVALID_PE; | |
302 | pe->pdev = NULL; | |
303 | pci_dev_put(dev); | |
304 | return NULL; | |
305 | } | |
306 | ||
307 | /* Assign a DMA weight to the device */ | |
308 | pe->dma_weight = pnv_ioda_dma_weight(dev); | |
309 | if (pe->dma_weight != 0) { | |
310 | phb->ioda.dma_weight += pe->dma_weight; | |
311 | phb->ioda.dma_pe_count++; | |
312 | } | |
313 | ||
314 | /* Link the PE */ | |
315 | pnv_ioda_link_pe_by_weight(phb, pe); | |
316 | ||
317 | return pe; | |
318 | } | |
fb446ad0 | 319 | #endif /* Useful for SRIOV case */ |
184cd4a3 BH |
320 | |
321 | static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe) | |
322 | { | |
323 | struct pci_dev *dev; | |
324 | ||
325 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
326 | struct pci_dn *pdn = pnv_ioda_get_pdn(dev); | |
327 | ||
328 | if (pdn == NULL) { | |
329 | pr_warn("%s: No device node associated with device !\n", | |
330 | pci_name(dev)); | |
331 | continue; | |
332 | } | |
333 | pci_dev_get(dev); | |
334 | pdn->pcidev = dev; | |
335 | pdn->pe_number = pe->pe_number; | |
336 | pe->dma_weight += pnv_ioda_dma_weight(dev); | |
fb446ad0 | 337 | if ((pe->flags & PNV_IODA_PE_BUS_ALL) && dev->subordinate) |
184cd4a3 BH |
338 | pnv_ioda_setup_same_PE(dev->subordinate, pe); |
339 | } | |
340 | } | |
341 | ||
fb446ad0 GS |
342 | /* |
343 | * There're 2 types of PCI bus sensitive PEs: One that is compromised of | |
344 | * single PCI bus. Another one that contains the primary PCI bus and its | |
345 | * subordinate PCI devices and buses. The second type of PE is normally | |
346 | * orgiriated by PCIe-to-PCI bridge or PLX switch downstream ports. | |
347 | */ | |
cad5cef6 | 348 | static void pnv_ioda_setup_bus_PE(struct pci_bus *bus, int all) |
184cd4a3 | 349 | { |
fb446ad0 | 350 | struct pci_controller *hose = pci_bus_to_host(bus); |
184cd4a3 | 351 | struct pnv_phb *phb = hose->private_data; |
184cd4a3 BH |
352 | struct pnv_ioda_pe *pe; |
353 | int pe_num; | |
354 | ||
184cd4a3 BH |
355 | pe_num = pnv_ioda_alloc_pe(phb); |
356 | if (pe_num == IODA_INVALID_PE) { | |
fb446ad0 GS |
357 | pr_warning("%s: Not enough PE# available for PCI bus %04x:%02x\n", |
358 | __func__, pci_domain_nr(bus), bus->number); | |
184cd4a3 BH |
359 | return; |
360 | } | |
361 | ||
362 | pe = &phb->ioda.pe_array[pe_num]; | |
fb446ad0 | 363 | pe->flags = (all ? PNV_IODA_PE_BUS_ALL : PNV_IODA_PE_BUS); |
184cd4a3 BH |
364 | pe->pbus = bus; |
365 | pe->pdev = NULL; | |
366 | pe->tce32_seg = -1; | |
367 | pe->mve_number = -1; | |
b918c62e | 368 | pe->rid = bus->busn_res.start << 8; |
184cd4a3 BH |
369 | pe->dma_weight = 0; |
370 | ||
fb446ad0 GS |
371 | if (all) |
372 | pe_info(pe, "Secondary bus %d..%d associated with PE#%d\n", | |
373 | bus->busn_res.start, bus->busn_res.end, pe_num); | |
374 | else | |
375 | pe_info(pe, "Secondary bus %d associated with PE#%d\n", | |
376 | bus->busn_res.start, pe_num); | |
184cd4a3 BH |
377 | |
378 | if (pnv_ioda_configure_pe(phb, pe)) { | |
379 | /* XXX What do we do here ? */ | |
380 | if (pe_num) | |
381 | pnv_ioda_free_pe(phb, pe_num); | |
382 | pe->pbus = NULL; | |
383 | return; | |
384 | } | |
385 | ||
386 | /* Associate it with all child devices */ | |
387 | pnv_ioda_setup_same_PE(bus, pe); | |
388 | ||
7ebdf956 GS |
389 | /* Put PE to the list */ |
390 | list_add_tail(&pe->list, &phb->ioda.pe_list); | |
391 | ||
184cd4a3 BH |
392 | /* Account for one DMA PE if at least one DMA capable device exist |
393 | * below the bridge | |
394 | */ | |
395 | if (pe->dma_weight != 0) { | |
396 | phb->ioda.dma_weight += pe->dma_weight; | |
397 | phb->ioda.dma_pe_count++; | |
398 | } | |
399 | ||
400 | /* Link the PE */ | |
401 | pnv_ioda_link_pe_by_weight(phb, pe); | |
402 | } | |
403 | ||
cad5cef6 | 404 | static void pnv_ioda_setup_PEs(struct pci_bus *bus) |
184cd4a3 BH |
405 | { |
406 | struct pci_dev *dev; | |
fb446ad0 GS |
407 | |
408 | pnv_ioda_setup_bus_PE(bus, 0); | |
184cd4a3 BH |
409 | |
410 | list_for_each_entry(dev, &bus->devices, bus_list) { | |
fb446ad0 GS |
411 | if (dev->subordinate) { |
412 | if (pci_pcie_type(dev) == PCI_EXP_TYPE_PCI_BRIDGE) | |
413 | pnv_ioda_setup_bus_PE(dev->subordinate, 1); | |
414 | else | |
415 | pnv_ioda_setup_PEs(dev->subordinate); | |
416 | } | |
417 | } | |
418 | } | |
419 | ||
420 | /* | |
421 | * Configure PEs so that the downstream PCI buses and devices | |
422 | * could have their associated PE#. Unfortunately, we didn't | |
423 | * figure out the way to identify the PLX bridge yet. So we | |
424 | * simply put the PCI bus and the subordinate behind the root | |
425 | * port to PE# here. The game rule here is expected to be changed | |
426 | * as soon as we can detected PLX bridge correctly. | |
427 | */ | |
cad5cef6 | 428 | static void pnv_pci_ioda_setup_PEs(void) |
fb446ad0 GS |
429 | { |
430 | struct pci_controller *hose, *tmp; | |
431 | ||
432 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { | |
433 | pnv_ioda_setup_PEs(hose->bus); | |
184cd4a3 BH |
434 | } |
435 | } | |
436 | ||
959c9bdd | 437 | static void pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb, struct pci_dev *pdev) |
184cd4a3 | 438 | { |
959c9bdd GS |
439 | struct pci_dn *pdn = pnv_ioda_get_pdn(pdev); |
440 | struct pnv_ioda_pe *pe; | |
184cd4a3 | 441 | |
959c9bdd GS |
442 | /* |
443 | * The function can be called while the PE# | |
444 | * hasn't been assigned. Do nothing for the | |
445 | * case. | |
446 | */ | |
447 | if (!pdn || pdn->pe_number == IODA_INVALID_PE) | |
448 | return; | |
184cd4a3 | 449 | |
959c9bdd GS |
450 | pe = &phb->ioda.pe_array[pdn->pe_number]; |
451 | set_iommu_table_base(&pdev->dev, &pe->tce32_table); | |
184cd4a3 BH |
452 | } |
453 | ||
4cce9550 GS |
454 | static void pnv_pci_ioda1_tce_invalidate(struct iommu_table *tbl, |
455 | u64 *startp, u64 *endp) | |
456 | { | |
457 | u64 __iomem *invalidate = (u64 __iomem *)tbl->it_index; | |
458 | unsigned long start, end, inc; | |
459 | ||
460 | start = __pa(startp); | |
461 | end = __pa(endp); | |
462 | ||
463 | /* BML uses this case for p6/p7/galaxy2: Shift addr and put in node */ | |
464 | if (tbl->it_busno) { | |
465 | start <<= 12; | |
466 | end <<= 12; | |
467 | inc = 128 << 12; | |
468 | start |= tbl->it_busno; | |
469 | end |= tbl->it_busno; | |
470 | } else if (tbl->it_type & TCE_PCI_SWINV_PAIR) { | |
471 | /* p7ioc-style invalidation, 2 TCEs per write */ | |
472 | start |= (1ull << 63); | |
473 | end |= (1ull << 63); | |
474 | inc = 16; | |
475 | } else { | |
476 | /* Default (older HW) */ | |
477 | inc = 128; | |
478 | } | |
479 | ||
480 | end |= inc - 1; /* round up end to be different than start */ | |
481 | ||
482 | mb(); /* Ensure above stores are visible */ | |
483 | while (start <= end) { | |
484 | __raw_writeq(start, invalidate); | |
485 | start += inc; | |
486 | } | |
487 | ||
488 | /* | |
489 | * The iommu layer will do another mb() for us on build() | |
490 | * and we don't care on free() | |
491 | */ | |
492 | } | |
493 | ||
494 | static void pnv_pci_ioda2_tce_invalidate(struct pnv_ioda_pe *pe, | |
495 | struct iommu_table *tbl, | |
496 | u64 *startp, u64 *endp) | |
497 | { | |
498 | unsigned long start, end, inc; | |
499 | u64 __iomem *invalidate = (u64 __iomem *)tbl->it_index; | |
500 | ||
501 | /* We'll invalidate DMA address in PE scope */ | |
502 | start = 0x2ul << 60; | |
503 | start |= (pe->pe_number & 0xFF); | |
504 | end = start; | |
505 | ||
506 | /* Figure out the start, end and step */ | |
507 | inc = tbl->it_offset + (((u64)startp - tbl->it_base) / sizeof(u64)); | |
508 | start |= (inc << 12); | |
509 | inc = tbl->it_offset + (((u64)endp - tbl->it_base) / sizeof(u64)); | |
510 | end |= (inc << 12); | |
511 | inc = (0x1ul << 12); | |
512 | mb(); | |
513 | ||
514 | while (start <= end) { | |
515 | __raw_writeq(start, invalidate); | |
516 | start += inc; | |
517 | } | |
518 | } | |
519 | ||
520 | void pnv_pci_ioda_tce_invalidate(struct iommu_table *tbl, | |
521 | u64 *startp, u64 *endp) | |
522 | { | |
523 | struct pnv_ioda_pe *pe = container_of(tbl, struct pnv_ioda_pe, | |
524 | tce32_table); | |
525 | struct pnv_phb *phb = pe->phb; | |
526 | ||
527 | if (phb->type == PNV_PHB_IODA1) | |
528 | pnv_pci_ioda1_tce_invalidate(tbl, startp, endp); | |
529 | else | |
530 | pnv_pci_ioda2_tce_invalidate(pe, tbl, startp, endp); | |
531 | } | |
532 | ||
cad5cef6 GKH |
533 | static void pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb, |
534 | struct pnv_ioda_pe *pe, unsigned int base, | |
535 | unsigned int segs) | |
184cd4a3 BH |
536 | { |
537 | ||
538 | struct page *tce_mem = NULL; | |
539 | const __be64 *swinvp; | |
540 | struct iommu_table *tbl; | |
541 | unsigned int i; | |
542 | int64_t rc; | |
543 | void *addr; | |
544 | ||
545 | /* 256M DMA window, 4K TCE pages, 8 bytes TCE */ | |
546 | #define TCE32_TABLE_SIZE ((0x10000000 / 0x1000) * 8) | |
547 | ||
548 | /* XXX FIXME: Handle 64-bit only DMA devices */ | |
549 | /* XXX FIXME: Provide 64-bit DMA facilities & non-4K TCE tables etc.. */ | |
550 | /* XXX FIXME: Allocate multi-level tables on PHB3 */ | |
551 | ||
552 | /* We shouldn't already have a 32-bit DMA associated */ | |
553 | if (WARN_ON(pe->tce32_seg >= 0)) | |
554 | return; | |
555 | ||
556 | /* Grab a 32-bit TCE table */ | |
557 | pe->tce32_seg = base; | |
558 | pe_info(pe, " Setting up 32-bit TCE table at %08x..%08x\n", | |
559 | (base << 28), ((base + segs) << 28) - 1); | |
560 | ||
561 | /* XXX Currently, we allocate one big contiguous table for the | |
562 | * TCEs. We only really need one chunk per 256M of TCE space | |
563 | * (ie per segment) but that's an optimization for later, it | |
564 | * requires some added smarts with our get/put_tce implementation | |
565 | */ | |
566 | tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL, | |
567 | get_order(TCE32_TABLE_SIZE * segs)); | |
568 | if (!tce_mem) { | |
569 | pe_err(pe, " Failed to allocate a 32-bit TCE memory\n"); | |
570 | goto fail; | |
571 | } | |
572 | addr = page_address(tce_mem); | |
573 | memset(addr, 0, TCE32_TABLE_SIZE * segs); | |
574 | ||
575 | /* Configure HW */ | |
576 | for (i = 0; i < segs; i++) { | |
577 | rc = opal_pci_map_pe_dma_window(phb->opal_id, | |
578 | pe->pe_number, | |
579 | base + i, 1, | |
580 | __pa(addr) + TCE32_TABLE_SIZE * i, | |
581 | TCE32_TABLE_SIZE, 0x1000); | |
582 | if (rc) { | |
583 | pe_err(pe, " Failed to configure 32-bit TCE table," | |
584 | " err %ld\n", rc); | |
585 | goto fail; | |
586 | } | |
587 | } | |
588 | ||
589 | /* Setup linux iommu table */ | |
590 | tbl = &pe->tce32_table; | |
591 | pnv_pci_setup_iommu_table(tbl, addr, TCE32_TABLE_SIZE * segs, | |
592 | base << 28); | |
593 | ||
594 | /* OPAL variant of P7IOC SW invalidated TCEs */ | |
595 | swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL); | |
596 | if (swinvp) { | |
597 | /* We need a couple more fields -- an address and a data | |
598 | * to or. Since the bus is only printed out on table free | |
599 | * errors, and on the first pass the data will be a relative | |
600 | * bus number, print that out instead. | |
601 | */ | |
602 | tbl->it_busno = 0; | |
603 | tbl->it_index = (unsigned long)ioremap(be64_to_cpup(swinvp), 8); | |
373f5657 GS |
604 | tbl->it_type = TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE | |
605 | TCE_PCI_SWINV_PAIR; | |
184cd4a3 BH |
606 | } |
607 | iommu_init_table(tbl, phb->hose->node); | |
608 | ||
184cd4a3 BH |
609 | return; |
610 | fail: | |
611 | /* XXX Failure: Try to fallback to 64-bit only ? */ | |
612 | if (pe->tce32_seg >= 0) | |
613 | pe->tce32_seg = -1; | |
614 | if (tce_mem) | |
615 | __free_pages(tce_mem, get_order(TCE32_TABLE_SIZE * segs)); | |
616 | } | |
617 | ||
373f5657 GS |
618 | static void pnv_pci_ioda2_setup_dma_pe(struct pnv_phb *phb, |
619 | struct pnv_ioda_pe *pe) | |
620 | { | |
621 | struct page *tce_mem = NULL; | |
622 | void *addr; | |
623 | const __be64 *swinvp; | |
624 | struct iommu_table *tbl; | |
625 | unsigned int tce_table_size, end; | |
626 | int64_t rc; | |
627 | ||
628 | /* We shouldn't already have a 32-bit DMA associated */ | |
629 | if (WARN_ON(pe->tce32_seg >= 0)) | |
630 | return; | |
631 | ||
632 | /* The PE will reserve all possible 32-bits space */ | |
633 | pe->tce32_seg = 0; | |
634 | end = (1 << ilog2(phb->ioda.m32_pci_base)); | |
635 | tce_table_size = (end / 0x1000) * 8; | |
636 | pe_info(pe, "Setting up 32-bit TCE table at 0..%08x\n", | |
637 | end); | |
638 | ||
639 | /* Allocate TCE table */ | |
640 | tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL, | |
641 | get_order(tce_table_size)); | |
642 | if (!tce_mem) { | |
643 | pe_err(pe, "Failed to allocate a 32-bit TCE memory\n"); | |
644 | goto fail; | |
645 | } | |
646 | addr = page_address(tce_mem); | |
647 | memset(addr, 0, tce_table_size); | |
648 | ||
649 | /* | |
650 | * Map TCE table through TVT. The TVE index is the PE number | |
651 | * shifted by 1 bit for 32-bits DMA space. | |
652 | */ | |
653 | rc = opal_pci_map_pe_dma_window(phb->opal_id, pe->pe_number, | |
654 | pe->pe_number << 1, 1, __pa(addr), | |
655 | tce_table_size, 0x1000); | |
656 | if (rc) { | |
657 | pe_err(pe, "Failed to configure 32-bit TCE table," | |
658 | " err %ld\n", rc); | |
659 | goto fail; | |
660 | } | |
661 | ||
662 | /* Setup linux iommu table */ | |
663 | tbl = &pe->tce32_table; | |
664 | pnv_pci_setup_iommu_table(tbl, addr, tce_table_size, 0); | |
665 | ||
666 | /* OPAL variant of PHB3 invalidated TCEs */ | |
667 | swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL); | |
668 | if (swinvp) { | |
669 | /* We need a couple more fields -- an address and a data | |
670 | * to or. Since the bus is only printed out on table free | |
671 | * errors, and on the first pass the data will be a relative | |
672 | * bus number, print that out instead. | |
673 | */ | |
674 | tbl->it_busno = 0; | |
675 | tbl->it_index = (unsigned long)ioremap(be64_to_cpup(swinvp), 8); | |
676 | tbl->it_type = TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE; | |
677 | } | |
678 | iommu_init_table(tbl, phb->hose->node); | |
679 | ||
373f5657 GS |
680 | return; |
681 | fail: | |
682 | if (pe->tce32_seg >= 0) | |
683 | pe->tce32_seg = -1; | |
684 | if (tce_mem) | |
685 | __free_pages(tce_mem, get_order(tce_table_size)); | |
686 | } | |
687 | ||
cad5cef6 | 688 | static void pnv_ioda_setup_dma(struct pnv_phb *phb) |
184cd4a3 BH |
689 | { |
690 | struct pci_controller *hose = phb->hose; | |
691 | unsigned int residual, remaining, segs, tw, base; | |
692 | struct pnv_ioda_pe *pe; | |
693 | ||
694 | /* If we have more PE# than segments available, hand out one | |
695 | * per PE until we run out and let the rest fail. If not, | |
696 | * then we assign at least one segment per PE, plus more based | |
697 | * on the amount of devices under that PE | |
698 | */ | |
699 | if (phb->ioda.dma_pe_count > phb->ioda.tce32_count) | |
700 | residual = 0; | |
701 | else | |
702 | residual = phb->ioda.tce32_count - | |
703 | phb->ioda.dma_pe_count; | |
704 | ||
705 | pr_info("PCI: Domain %04x has %ld available 32-bit DMA segments\n", | |
706 | hose->global_number, phb->ioda.tce32_count); | |
707 | pr_info("PCI: %d PE# for a total weight of %d\n", | |
708 | phb->ioda.dma_pe_count, phb->ioda.dma_weight); | |
709 | ||
710 | /* Walk our PE list and configure their DMA segments, hand them | |
711 | * out one base segment plus any residual segments based on | |
712 | * weight | |
713 | */ | |
714 | remaining = phb->ioda.tce32_count; | |
715 | tw = phb->ioda.dma_weight; | |
716 | base = 0; | |
7ebdf956 | 717 | list_for_each_entry(pe, &phb->ioda.pe_dma_list, dma_link) { |
184cd4a3 BH |
718 | if (!pe->dma_weight) |
719 | continue; | |
720 | if (!remaining) { | |
721 | pe_warn(pe, "No DMA32 resources available\n"); | |
722 | continue; | |
723 | } | |
724 | segs = 1; | |
725 | if (residual) { | |
726 | segs += ((pe->dma_weight * residual) + (tw / 2)) / tw; | |
727 | if (segs > remaining) | |
728 | segs = remaining; | |
729 | } | |
373f5657 GS |
730 | |
731 | /* | |
732 | * For IODA2 compliant PHB3, we needn't care about the weight. | |
733 | * The all available 32-bits DMA space will be assigned to | |
734 | * the specific PE. | |
735 | */ | |
736 | if (phb->type == PNV_PHB_IODA1) { | |
737 | pe_info(pe, "DMA weight %d, assigned %d DMA32 segments\n", | |
738 | pe->dma_weight, segs); | |
739 | pnv_pci_ioda_setup_dma_pe(phb, pe, base, segs); | |
740 | } else { | |
741 | pe_info(pe, "Assign DMA32 space\n"); | |
742 | segs = 0; | |
743 | pnv_pci_ioda2_setup_dma_pe(phb, pe); | |
744 | } | |
745 | ||
184cd4a3 BH |
746 | remaining -= segs; |
747 | base += segs; | |
748 | } | |
749 | } | |
750 | ||
751 | #ifdef CONFIG_PCI_MSI | |
137436c9 GS |
752 | static void pnv_ioda2_msi_eoi(struct irq_data *d) |
753 | { | |
754 | unsigned int hw_irq = (unsigned int)irqd_to_hwirq(d); | |
755 | struct irq_chip *chip = irq_data_get_irq_chip(d); | |
756 | struct pnv_phb *phb = container_of(chip, struct pnv_phb, | |
757 | ioda.irq_chip); | |
758 | int64_t rc; | |
759 | ||
760 | rc = opal_pci_msi_eoi(phb->opal_id, hw_irq); | |
761 | WARN_ON_ONCE(rc); | |
762 | ||
763 | icp_native_eoi(d); | |
764 | } | |
765 | ||
184cd4a3 | 766 | static int pnv_pci_ioda_msi_setup(struct pnv_phb *phb, struct pci_dev *dev, |
137436c9 GS |
767 | unsigned int hwirq, unsigned int virq, |
768 | unsigned int is_64, struct msi_msg *msg) | |
184cd4a3 BH |
769 | { |
770 | struct pnv_ioda_pe *pe = pnv_ioda_get_pe(dev); | |
137436c9 GS |
771 | struct irq_data *idata; |
772 | struct irq_chip *ichip; | |
184cd4a3 BH |
773 | unsigned int xive_num = hwirq - phb->msi_base; |
774 | uint64_t addr64; | |
775 | uint32_t addr32, data; | |
776 | int rc; | |
777 | ||
778 | /* No PE assigned ? bail out ... no MSI for you ! */ | |
779 | if (pe == NULL) | |
780 | return -ENXIO; | |
781 | ||
782 | /* Check if we have an MVE */ | |
783 | if (pe->mve_number < 0) | |
784 | return -ENXIO; | |
785 | ||
786 | /* Assign XIVE to PE */ | |
787 | rc = opal_pci_set_xive_pe(phb->opal_id, pe->pe_number, xive_num); | |
788 | if (rc) { | |
789 | pr_warn("%s: OPAL error %d setting XIVE %d PE\n", | |
790 | pci_name(dev), rc, xive_num); | |
791 | return -EIO; | |
792 | } | |
793 | ||
794 | if (is_64) { | |
795 | rc = opal_get_msi_64(phb->opal_id, pe->mve_number, xive_num, 1, | |
796 | &addr64, &data); | |
797 | if (rc) { | |
798 | pr_warn("%s: OPAL error %d getting 64-bit MSI data\n", | |
799 | pci_name(dev), rc); | |
800 | return -EIO; | |
801 | } | |
802 | msg->address_hi = addr64 >> 32; | |
803 | msg->address_lo = addr64 & 0xfffffffful; | |
804 | } else { | |
805 | rc = opal_get_msi_32(phb->opal_id, pe->mve_number, xive_num, 1, | |
806 | &addr32, &data); | |
807 | if (rc) { | |
808 | pr_warn("%s: OPAL error %d getting 32-bit MSI data\n", | |
809 | pci_name(dev), rc); | |
810 | return -EIO; | |
811 | } | |
812 | msg->address_hi = 0; | |
813 | msg->address_lo = addr32; | |
814 | } | |
815 | msg->data = data; | |
816 | ||
137436c9 GS |
817 | /* |
818 | * Change the IRQ chip for the MSI interrupts on PHB3. | |
819 | * The corresponding IRQ chip should be populated for | |
820 | * the first time. | |
821 | */ | |
822 | if (phb->type == PNV_PHB_IODA2) { | |
823 | if (!phb->ioda.irq_chip_init) { | |
824 | idata = irq_get_irq_data(virq); | |
825 | ichip = irq_data_get_irq_chip(idata); | |
826 | phb->ioda.irq_chip_init = 1; | |
827 | phb->ioda.irq_chip = *ichip; | |
828 | phb->ioda.irq_chip.irq_eoi = pnv_ioda2_msi_eoi; | |
829 | } | |
830 | ||
831 | irq_set_chip(virq, &phb->ioda.irq_chip); | |
832 | } | |
833 | ||
184cd4a3 BH |
834 | pr_devel("%s: %s-bit MSI on hwirq %x (xive #%d)," |
835 | " address=%x_%08x data=%x PE# %d\n", | |
836 | pci_name(dev), is_64 ? "64" : "32", hwirq, xive_num, | |
837 | msg->address_hi, msg->address_lo, data, pe->pe_number); | |
838 | ||
839 | return 0; | |
840 | } | |
841 | ||
842 | static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) | |
843 | { | |
fb1b55d6 | 844 | unsigned int count; |
184cd4a3 BH |
845 | const __be32 *prop = of_get_property(phb->hose->dn, |
846 | "ibm,opal-msi-ranges", NULL); | |
847 | if (!prop) { | |
848 | /* BML Fallback */ | |
849 | prop = of_get_property(phb->hose->dn, "msi-ranges", NULL); | |
850 | } | |
851 | if (!prop) | |
852 | return; | |
853 | ||
854 | phb->msi_base = be32_to_cpup(prop); | |
fb1b55d6 GS |
855 | count = be32_to_cpup(prop + 1); |
856 | if (msi_bitmap_alloc(&phb->msi_bmp, count, phb->hose->dn)) { | |
184cd4a3 BH |
857 | pr_err("PCI %d: Failed to allocate MSI bitmap !\n", |
858 | phb->hose->global_number); | |
859 | return; | |
860 | } | |
fb1b55d6 | 861 | |
184cd4a3 BH |
862 | phb->msi_setup = pnv_pci_ioda_msi_setup; |
863 | phb->msi32_support = 1; | |
864 | pr_info(" Allocated bitmap for %d MSIs (base IRQ 0x%x)\n", | |
fb1b55d6 | 865 | count, phb->msi_base); |
184cd4a3 BH |
866 | } |
867 | #else | |
868 | static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) { } | |
869 | #endif /* CONFIG_PCI_MSI */ | |
870 | ||
11685bec GS |
871 | /* |
872 | * This function is supposed to be called on basis of PE from top | |
873 | * to bottom style. So the the I/O or MMIO segment assigned to | |
874 | * parent PE could be overrided by its child PEs if necessary. | |
875 | */ | |
cad5cef6 GKH |
876 | static void pnv_ioda_setup_pe_seg(struct pci_controller *hose, |
877 | struct pnv_ioda_pe *pe) | |
11685bec GS |
878 | { |
879 | struct pnv_phb *phb = hose->private_data; | |
880 | struct pci_bus_region region; | |
881 | struct resource *res; | |
882 | int i, index; | |
883 | int rc; | |
884 | ||
885 | /* | |
886 | * NOTE: We only care PCI bus based PE for now. For PCI | |
887 | * device based PE, for example SRIOV sensitive VF should | |
888 | * be figured out later. | |
889 | */ | |
890 | BUG_ON(!(pe->flags & (PNV_IODA_PE_BUS | PNV_IODA_PE_BUS_ALL))); | |
891 | ||
892 | pci_bus_for_each_resource(pe->pbus, res, i) { | |
893 | if (!res || !res->flags || | |
894 | res->start > res->end) | |
895 | continue; | |
896 | ||
897 | if (res->flags & IORESOURCE_IO) { | |
898 | region.start = res->start - phb->ioda.io_pci_base; | |
899 | region.end = res->end - phb->ioda.io_pci_base; | |
900 | index = region.start / phb->ioda.io_segsize; | |
901 | ||
902 | while (index < phb->ioda.total_pe && | |
903 | region.start <= region.end) { | |
904 | phb->ioda.io_segmap[index] = pe->pe_number; | |
905 | rc = opal_pci_map_pe_mmio_window(phb->opal_id, | |
906 | pe->pe_number, OPAL_IO_WINDOW_TYPE, 0, index); | |
907 | if (rc != OPAL_SUCCESS) { | |
908 | pr_err("%s: OPAL error %d when mapping IO " | |
909 | "segment #%d to PE#%d\n", | |
910 | __func__, rc, index, pe->pe_number); | |
911 | break; | |
912 | } | |
913 | ||
914 | region.start += phb->ioda.io_segsize; | |
915 | index++; | |
916 | } | |
917 | } else if (res->flags & IORESOURCE_MEM) { | |
918 | region.start = res->start - | |
919 | hose->pci_mem_offset - | |
920 | phb->ioda.m32_pci_base; | |
921 | region.end = res->end - | |
922 | hose->pci_mem_offset - | |
923 | phb->ioda.m32_pci_base; | |
924 | index = region.start / phb->ioda.m32_segsize; | |
925 | ||
926 | while (index < phb->ioda.total_pe && | |
927 | region.start <= region.end) { | |
928 | phb->ioda.m32_segmap[index] = pe->pe_number; | |
929 | rc = opal_pci_map_pe_mmio_window(phb->opal_id, | |
930 | pe->pe_number, OPAL_M32_WINDOW_TYPE, 0, index); | |
931 | if (rc != OPAL_SUCCESS) { | |
932 | pr_err("%s: OPAL error %d when mapping M32 " | |
933 | "segment#%d to PE#%d", | |
934 | __func__, rc, index, pe->pe_number); | |
935 | break; | |
936 | } | |
937 | ||
938 | region.start += phb->ioda.m32_segsize; | |
939 | index++; | |
940 | } | |
941 | } | |
942 | } | |
943 | } | |
944 | ||
cad5cef6 | 945 | static void pnv_pci_ioda_setup_seg(void) |
11685bec GS |
946 | { |
947 | struct pci_controller *tmp, *hose; | |
948 | struct pnv_phb *phb; | |
949 | struct pnv_ioda_pe *pe; | |
950 | ||
951 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { | |
952 | phb = hose->private_data; | |
953 | list_for_each_entry(pe, &phb->ioda.pe_list, list) { | |
954 | pnv_ioda_setup_pe_seg(hose, pe); | |
955 | } | |
956 | } | |
957 | } | |
958 | ||
cad5cef6 | 959 | static void pnv_pci_ioda_setup_DMA(void) |
13395c48 GS |
960 | { |
961 | struct pci_controller *hose, *tmp; | |
db1266c8 | 962 | struct pnv_phb *phb; |
13395c48 GS |
963 | |
964 | list_for_each_entry_safe(hose, tmp, &hose_list, list_node) { | |
965 | pnv_ioda_setup_dma(hose->private_data); | |
db1266c8 GS |
966 | |
967 | /* Mark the PHB initialization done */ | |
968 | phb = hose->private_data; | |
969 | phb->initialized = 1; | |
13395c48 GS |
970 | } |
971 | } | |
972 | ||
cad5cef6 | 973 | static void pnv_pci_ioda_fixup(void) |
fb446ad0 GS |
974 | { |
975 | pnv_pci_ioda_setup_PEs(); | |
11685bec | 976 | pnv_pci_ioda_setup_seg(); |
13395c48 | 977 | pnv_pci_ioda_setup_DMA(); |
fb446ad0 GS |
978 | } |
979 | ||
271fd03a GS |
980 | /* |
981 | * Returns the alignment for I/O or memory windows for P2P | |
982 | * bridges. That actually depends on how PEs are segmented. | |
983 | * For now, we return I/O or M32 segment size for PE sensitive | |
984 | * P2P bridges. Otherwise, the default values (4KiB for I/O, | |
985 | * 1MiB for memory) will be returned. | |
986 | * | |
987 | * The current PCI bus might be put into one PE, which was | |
988 | * create against the parent PCI bridge. For that case, we | |
989 | * needn't enlarge the alignment so that we can save some | |
990 | * resources. | |
991 | */ | |
992 | static resource_size_t pnv_pci_window_alignment(struct pci_bus *bus, | |
993 | unsigned long type) | |
994 | { | |
995 | struct pci_dev *bridge; | |
996 | struct pci_controller *hose = pci_bus_to_host(bus); | |
997 | struct pnv_phb *phb = hose->private_data; | |
998 | int num_pci_bridges = 0; | |
999 | ||
1000 | bridge = bus->self; | |
1001 | while (bridge) { | |
1002 | if (pci_pcie_type(bridge) == PCI_EXP_TYPE_PCI_BRIDGE) { | |
1003 | num_pci_bridges++; | |
1004 | if (num_pci_bridges >= 2) | |
1005 | return 1; | |
1006 | } | |
1007 | ||
1008 | bridge = bridge->bus->self; | |
1009 | } | |
1010 | ||
1011 | /* We need support prefetchable memory window later */ | |
1012 | if (type & IORESOURCE_MEM) | |
1013 | return phb->ioda.m32_segsize; | |
1014 | ||
1015 | return phb->ioda.io_segsize; | |
1016 | } | |
1017 | ||
184cd4a3 BH |
1018 | /* Prevent enabling devices for which we couldn't properly |
1019 | * assign a PE | |
1020 | */ | |
cad5cef6 | 1021 | static int pnv_pci_enable_device_hook(struct pci_dev *dev) |
184cd4a3 | 1022 | { |
db1266c8 GS |
1023 | struct pci_controller *hose = pci_bus_to_host(dev->bus); |
1024 | struct pnv_phb *phb = hose->private_data; | |
1025 | struct pci_dn *pdn; | |
184cd4a3 | 1026 | |
db1266c8 GS |
1027 | /* The function is probably called while the PEs have |
1028 | * not be created yet. For example, resource reassignment | |
1029 | * during PCI probe period. We just skip the check if | |
1030 | * PEs isn't ready. | |
1031 | */ | |
1032 | if (!phb->initialized) | |
1033 | return 0; | |
1034 | ||
1035 | pdn = pnv_ioda_get_pdn(dev); | |
184cd4a3 BH |
1036 | if (!pdn || pdn->pe_number == IODA_INVALID_PE) |
1037 | return -EINVAL; | |
db1266c8 | 1038 | |
184cd4a3 BH |
1039 | return 0; |
1040 | } | |
1041 | ||
1042 | static u32 pnv_ioda_bdfn_to_pe(struct pnv_phb *phb, struct pci_bus *bus, | |
1043 | u32 devfn) | |
1044 | { | |
1045 | return phb->ioda.pe_rmap[(bus->number << 8) | devfn]; | |
1046 | } | |
1047 | ||
aa0c033f | 1048 | void __init pnv_pci_init_ioda_phb(struct device_node *np, int ioda_type) |
184cd4a3 BH |
1049 | { |
1050 | struct pci_controller *hose; | |
1051 | static int primary = 1; | |
1052 | struct pnv_phb *phb; | |
1053 | unsigned long size, m32map_off, iomap_off, pemap_off; | |
1054 | const u64 *prop64; | |
aa0c033f | 1055 | const u32 *prop32; |
184cd4a3 BH |
1056 | u64 phb_id; |
1057 | void *aux; | |
1058 | long rc; | |
1059 | ||
aa0c033f | 1060 | pr_info(" Initializing IODA%d OPAL PHB %s\n", ioda_type, np->full_name); |
184cd4a3 BH |
1061 | |
1062 | prop64 = of_get_property(np, "ibm,opal-phbid", NULL); | |
1063 | if (!prop64) { | |
1064 | pr_err(" Missing \"ibm,opal-phbid\" property !\n"); | |
1065 | return; | |
1066 | } | |
1067 | phb_id = be64_to_cpup(prop64); | |
1068 | pr_debug(" PHB-ID : 0x%016llx\n", phb_id); | |
1069 | ||
1070 | phb = alloc_bootmem(sizeof(struct pnv_phb)); | |
1071 | if (phb) { | |
1072 | memset(phb, 0, sizeof(struct pnv_phb)); | |
1073 | phb->hose = hose = pcibios_alloc_controller(np); | |
1074 | } | |
1075 | if (!phb || !phb->hose) { | |
1076 | pr_err("PCI: Failed to allocate PCI controller for %s\n", | |
1077 | np->full_name); | |
1078 | return; | |
1079 | } | |
1080 | ||
1081 | spin_lock_init(&phb->lock); | |
1082 | /* XXX Use device-tree */ | |
1083 | hose->first_busno = 0; | |
1084 | hose->last_busno = 0xff; | |
1085 | hose->private_data = phb; | |
1086 | phb->opal_id = phb_id; | |
aa0c033f | 1087 | phb->type = ioda_type; |
184cd4a3 | 1088 | |
cee72d5b BH |
1089 | /* Detect specific models for error handling */ |
1090 | if (of_device_is_compatible(np, "ibm,p7ioc-pciex")) | |
1091 | phb->model = PNV_PHB_MODEL_P7IOC; | |
f3d40c25 | 1092 | else if (of_device_is_compatible(np, "ibm,power8-pciex")) |
aa0c033f | 1093 | phb->model = PNV_PHB_MODEL_PHB3; |
cee72d5b BH |
1094 | else |
1095 | phb->model = PNV_PHB_MODEL_UNKNOWN; | |
1096 | ||
aa0c033f | 1097 | /* Parse 32-bit and IO ranges (if any) */ |
184cd4a3 BH |
1098 | pci_process_bridge_OF_ranges(phb->hose, np, primary); |
1099 | primary = 0; | |
1100 | ||
aa0c033f | 1101 | /* Get registers */ |
184cd4a3 BH |
1102 | phb->regs = of_iomap(np, 0); |
1103 | if (phb->regs == NULL) | |
1104 | pr_err(" Failed to map registers !\n"); | |
1105 | ||
184cd4a3 | 1106 | /* Initialize more IODA stuff */ |
aa0c033f GS |
1107 | prop32 = of_get_property(np, "ibm,opal-num-pes", NULL); |
1108 | if (!prop32) | |
1109 | phb->ioda.total_pe = 1; | |
1110 | else | |
1111 | phb->ioda.total_pe = *prop32; | |
184cd4a3 BH |
1112 | |
1113 | phb->ioda.m32_size = resource_size(&hose->mem_resources[0]); | |
aa0c033f | 1114 | /* FW Has already off top 64k of M32 space (MSI space) */ |
184cd4a3 BH |
1115 | phb->ioda.m32_size += 0x10000; |
1116 | ||
1117 | phb->ioda.m32_segsize = phb->ioda.m32_size / phb->ioda.total_pe; | |
1118 | phb->ioda.m32_pci_base = hose->mem_resources[0].start - | |
1119 | hose->pci_mem_offset; | |
1120 | phb->ioda.io_size = hose->pci_io_size; | |
1121 | phb->ioda.io_segsize = phb->ioda.io_size / phb->ioda.total_pe; | |
1122 | phb->ioda.io_pci_base = 0; /* XXX calculate this ? */ | |
1123 | ||
aa0c033f GS |
1124 | /* Allocate aux data & arrays |
1125 | * | |
1126 | * XXX TODO: Don't allocate io segmap on PHB3 | |
1127 | */ | |
184cd4a3 BH |
1128 | size = _ALIGN_UP(phb->ioda.total_pe / 8, sizeof(unsigned long)); |
1129 | m32map_off = size; | |
e47747f4 | 1130 | size += phb->ioda.total_pe * sizeof(phb->ioda.m32_segmap[0]); |
184cd4a3 | 1131 | iomap_off = size; |
e47747f4 | 1132 | size += phb->ioda.total_pe * sizeof(phb->ioda.io_segmap[0]); |
184cd4a3 BH |
1133 | pemap_off = size; |
1134 | size += phb->ioda.total_pe * sizeof(struct pnv_ioda_pe); | |
1135 | aux = alloc_bootmem(size); | |
1136 | memset(aux, 0, size); | |
1137 | phb->ioda.pe_alloc = aux; | |
1138 | phb->ioda.m32_segmap = aux + m32map_off; | |
1139 | phb->ioda.io_segmap = aux + iomap_off; | |
1140 | phb->ioda.pe_array = aux + pemap_off; | |
1141 | set_bit(0, phb->ioda.pe_alloc); | |
1142 | ||
7ebdf956 | 1143 | INIT_LIST_HEAD(&phb->ioda.pe_dma_list); |
184cd4a3 BH |
1144 | INIT_LIST_HEAD(&phb->ioda.pe_list); |
1145 | ||
1146 | /* Calculate how many 32-bit TCE segments we have */ | |
1147 | phb->ioda.tce32_count = phb->ioda.m32_pci_base >> 28; | |
1148 | ||
1149 | /* Clear unusable m64 */ | |
1150 | hose->mem_resources[1].flags = 0; | |
1151 | hose->mem_resources[1].start = 0; | |
1152 | hose->mem_resources[1].end = 0; | |
1153 | hose->mem_resources[2].flags = 0; | |
1154 | hose->mem_resources[2].start = 0; | |
1155 | hose->mem_resources[2].end = 0; | |
1156 | ||
aa0c033f | 1157 | #if 0 /* We should really do that ... */ |
184cd4a3 BH |
1158 | rc = opal_pci_set_phb_mem_window(opal->phb_id, |
1159 | window_type, | |
1160 | window_num, | |
1161 | starting_real_address, | |
1162 | starting_pci_address, | |
1163 | segment_size); | |
1164 | #endif | |
1165 | ||
1166 | pr_info(" %d PE's M32: 0x%x [segment=0x%x] IO: 0x%x [segment=0x%x]\n", | |
1167 | phb->ioda.total_pe, | |
1168 | phb->ioda.m32_size, phb->ioda.m32_segsize, | |
1169 | phb->ioda.io_size, phb->ioda.io_segsize); | |
1170 | ||
184cd4a3 BH |
1171 | phb->hose->ops = &pnv_pci_ops; |
1172 | ||
1173 | /* Setup RID -> PE mapping function */ | |
1174 | phb->bdfn_to_pe = pnv_ioda_bdfn_to_pe; | |
1175 | ||
1176 | /* Setup TCEs */ | |
1177 | phb->dma_dev_setup = pnv_pci_ioda_dma_dev_setup; | |
1178 | ||
1179 | /* Setup MSI support */ | |
1180 | pnv_pci_init_ioda_msis(phb); | |
1181 | ||
c40a4210 GS |
1182 | /* |
1183 | * We pass the PCI probe flag PCI_REASSIGN_ALL_RSRC here | |
1184 | * to let the PCI core do resource assignment. It's supposed | |
1185 | * that the PCI core will do correct I/O and MMIO alignment | |
1186 | * for the P2P bridge bars so that each PCI bus (excluding | |
1187 | * the child P2P bridges) can form individual PE. | |
184cd4a3 | 1188 | */ |
fb446ad0 | 1189 | ppc_md.pcibios_fixup = pnv_pci_ioda_fixup; |
184cd4a3 | 1190 | ppc_md.pcibios_enable_device_hook = pnv_pci_enable_device_hook; |
271fd03a | 1191 | ppc_md.pcibios_window_alignment = pnv_pci_window_alignment; |
c40a4210 | 1192 | pci_add_flags(PCI_REASSIGN_ALL_RSRC); |
184cd4a3 BH |
1193 | |
1194 | /* Reset IODA tables to a clean state */ | |
f11fe552 | 1195 | rc = opal_pci_reset(phb_id, OPAL_PCI_IODA_TABLE_RESET, OPAL_ASSERT_RESET); |
184cd4a3 | 1196 | if (rc) |
f11fe552 | 1197 | pr_warning(" OPAL Error %ld performing IODA table reset !\n", rc); |
aa0c033f GS |
1198 | |
1199 | /* | |
1200 | * On IODA1 map everything to PE#0, on IODA2 we assume the IODA reset | |
1201 | * has cleared the RTT which has the same effect | |
1202 | */ | |
1203 | if (ioda_type == PNV_PHB_IODA1) | |
1204 | opal_pci_set_pe(phb_id, 0, 0, 7, 1, 1 , OPAL_MAP_PE); | |
1205 | } | |
1206 | ||
1207 | void pnv_pci_init_ioda2_phb(struct device_node *np) | |
1208 | { | |
1209 | pnv_pci_init_ioda_phb(np, PNV_PHB_IODA2); | |
184cd4a3 BH |
1210 | } |
1211 | ||
1212 | void __init pnv_pci_init_ioda_hub(struct device_node *np) | |
1213 | { | |
1214 | struct device_node *phbn; | |
1215 | const u64 *prop64; | |
1216 | u64 hub_id; | |
1217 | ||
1218 | pr_info("Probing IODA IO-Hub %s\n", np->full_name); | |
1219 | ||
1220 | prop64 = of_get_property(np, "ibm,opal-hubid", NULL); | |
1221 | if (!prop64) { | |
1222 | pr_err(" Missing \"ibm,opal-hubid\" property !\n"); | |
1223 | return; | |
1224 | } | |
1225 | hub_id = be64_to_cpup(prop64); | |
1226 | pr_devel(" HUB-ID : 0x%016llx\n", hub_id); | |
1227 | ||
1228 | /* Count child PHBs */ | |
1229 | for_each_child_of_node(np, phbn) { | |
1230 | /* Look for IODA1 PHBs */ | |
1231 | if (of_device_is_compatible(phbn, "ibm,ioda-phb")) | |
aa0c033f | 1232 | pnv_pci_init_ioda_phb(phbn, PNV_PHB_IODA1); |
184cd4a3 BH |
1233 | } |
1234 | } |